Article
Chemistry, Physical
M. Sliwa, J. Podobinski, D. Rutkowska-Zbik, J. Datka
Summary: Catalytic conversion of ethanol into hydrogen is a promising method. This study focused on the transformations of ethanol on CuO/ZrO2 (Cu/Zr) mixed oxides with the addition of ZnO and NiO. It was found that CuO oxidized ethanol into acetaldehyde and water, while Cu/Zr performed both oxidation and dehydrogenation of ethanol, producing acetaldehyde, water, and hydrogen. ZnO facilitated the formation of acetone, and NiO caused the decomposition of acetaldehyde into methane and CO.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Multidisciplinary
Taro Ueda, Takumi Matsuo, Takeo Hyodo, Yasuhiro Shimizu
Summary: The effects of heat treatment on the Pt-loaded theta-Al2O3 catalysts were investigated in terms of CO-oxidation activity and CO-sensing properties for catalytic combustion-type gas sensors. It was found that the Pt-loaded theta-Al2O3 treated in wet N-2 showed higher CO-oxidation activity and completely converted CO to CO2 even at low temperature. The heat treatment in wet N-2 also resulted in smaller Pt particles and lower residual chlorine concentration in the catalyst. However, the sensor using Pt-loaded theta-Al2O3 treated in wet N-2 had lower sensitivity compared to the sensor using Pt-loaded theta-Al2O3 treated in dry air due to ineffective heat conduction.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
A. Sridevi, S. Krishnamohan, M. Thairiyaraja, B. Prakash, R. Yokeshwaran
Summary: A novel and facile γ-Al2O3/CuO nanocomposite was prepared via a hydrothermal technique and demonstrated excellent visible light photocatalytic activity. The γ-Al2O3/CuO nanocomposite exhibited the highest degradation efficiency for Rhodamine B and Methylene Blue dyes.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Jiangang Lv, Chong Chen, Xuefeng Guo, Weiping Ding, Weimin Yang
Summary: In this study, a special CuO/?-Al2O3 catalyst with {111} facet-exposed ?-Al2O3 nanotubes as support was prepared and investigated. The results showed that the CuO species supported on {111} facet-exposed ?-Al2O3 nanotube had better dispersity and stronger interaction compared to the {110} facet-exposed ?-Al2O3 nanosheet. Furthermore, the catalytic activity of the CuO/?-Al2O3 catalyst was greatly improved by manipulating the exposed facets of the crystal carrier.
MOLECULAR CATALYSIS
(2023)
Article
Biochemistry & Molecular Biology
Jerzy Podobinski, Malgorzata Zimowska, Katarzyna Samson, Michal Sliwa, Jerzy Datka
Summary: The reaction of ethanol with various oxides was studied using IR spectroscopy. Ethanol reacts with surface OH groups on certain oxides to form ethoxy groups and water. The amount and types of ethoxy groups formed depend on the basicity of the oxides. Oxides with higher basicity produce more ethoxy groups, while oxides with lower basicity produce fewer ethoxy groups. The ability of oxides to oxidize the ethoxy groups and the temperature of the oxidation peak in the H-2-TPR diagram follow a similar trend, with CuO/ZrO2 showing the highest oxidation ability.
Article
Chemistry, Multidisciplinary
Byeong Jun Cha, Ji Yoon Choi, Soo Hyun Kim, Shufang Zhao, Sher Ali Khan, Beomgyun Jeong, Young Dok Kim
Summary: Temperature-regulated chemical vapor deposition was used to disperse iron oxide nanoparticles on porous Al2O3 to create a catalytic Fe-oxide/Al2O3 structure for NH3 oxidation. The Fe-oxide/Al2O3 achieved almost complete NH3 removal, with N2 as the main product and no detectable NOx emissions at all temperatures. The results of spectroscopic analysis suggest an NH3 oxidation mechanism mediated by N2H4 on the Fe-oxide/Al2O3 surface. A dual catalytic filter system was designed using Fe-oxide/Al2O3 to fully oxidize NH3 to N2 in a clean and energy-efficient manner.
Article
Chemistry, Multidisciplinary
Jing Hu, Fucheng Wei, Xingyu Hu, Jianying Xu, Weijun Deng
Summary: In this study, a reliable synthesis of CuO loaded ceria hollow spheres (CHS-CuO) was reported, which exhibited excellent performance in CO oxidation reaction with a higher CO consumption rate. The superior performance was attributed to the hollow structure, large surface area, more adsorptive oxygen, and lower activation energy.
Article
Chemistry, Physical
Lei Gong, Weiwei Jie, Yumeng Liu, Xinchen Lin, Wenyong Deng, Mei Qiu, Xiuxia Hu, Qian Liu
Summary: Nanosized ceria was synthesized using a facile method in 2-methylimidazole solution, which exhibited excellent catalytic activity in the preferential oxidation of CO in H2-rich gases. The CuO/n-CeO2 catalyst with higher copper loading, CuCeO9, showed the highest activity and stability for complete CO conversion.
Article
Chemistry, Physical
Hu Li, Fei-Xiang Tian, Qi Liu, Yi-Fan Han, Minghui Zhu
Summary: Copper-cerium catalysts are commonly used for the oxidation of CO. This study prepared CuO/CeInOx catalysts and found that the inclusion of In dopants improved the catalyst's activity. The Cu/Ce90In10Ox catalyst showed excellent CO oxidation activity at low temperatures.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Liqun Kang, Bolun Wang, Andreas T. Guntner, Siyuan Xu, Xuhao Wan, Yiyun Liu, Sushila Marlow, Yifei Ren, Diego Gianolio, Chiu C. Tang, Vadim Murzin, Hiroyuki Asakura, Qian He, Shaoliang Guan, Juan J. Velasco-Velez, Sotiris E. Pratsinis, Yuzheng Guo, Feng Ryan Wang
Summary: In this study, a flow of electrons from metallic Cu to surface carbon species was observed, leading to the proposal of an electronic metal-support-carbon interaction model. This provides a comprehensive understanding of mass and electron flow, aiding in the prediction and improvement of catalytic performance in various chemical reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Lu Feng, Xiangdong Xing, Yueli Du, Zhenghua Shen, Hui Zhang, Liu Yang, Ming Lv
Summary: In this paper, the effect of KMnO4 modification on the performance of CuCeOx/Fe2O3 catalyst for CO oxidation in industrial flue gas was investigated. Various analytical techniques were employed to reveal the relationship between the structural properties and the catalyst performance. The results showed that KMnO4 modification led to an increase in catalytic activity, with 0.07 mol/L KMnO4 modified CuCeOx/Fe2O3 catalyst exhibiting a CO conversion of 78.2% at 160 degrees C. The modification also resulted in reduced grain size and improved dispersion of active particles, as well as an increase in oxygen-containing functional groups for anchoring metal particles and providing active oxygen species for CO oxidation.
Article
Chemistry, Physical
Wei Tan, Shaohua Xie, Xin Wang, Juntian Xu, Yong Yan, Kaili Ma, Yandi Cai, Kailong Ye, Fei Gao, Lin Dong, Fudong Liu
Summary: In this study, an efficient CuO catalyst supported on a CeO2-Al2O3 support (CA-T) prepared by two-step incipient wetness impregnation (T-IWI) method was successfully developed. The Cu/CA-T catalyst exhibited better catalytic performance in CO oxidation and NO reduction by CO (NO + CO reaction) as well as higher thermal stability compared to the CuO catalyst loaded on conventional CeO2-Al2O3 support (Cu/CA). The microstructure of CuO-CeO2-Al2O3 catalysts, especially the state of Cu species, was systematically investigated using various characterization techniques. The mechanisms of CO oxidation and NO + CO reactions on Cu/CA and Cu/CA-T catalysts were collaboratively revealed.
Article
Chemistry, Analytical
Xinyu Li, Pengcheng Xu, Yufan Zhou, Ying Chen, Hao Jia, Haitao Yu, Xinxin Li
Summary: The microcantilever-based in situ H2-TPR technology accurately measures the mass change caused by reduction of catalysts, and it has the advantages of simplified operation and high precision.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zhiwen Li, Yifei Zhang, Qike Jiang, Liangliang Xu, Zhong-Kang Han, Alfons Baiker, Gao Li
Summary: This study presents a synthetic strategy for preparing CuO-supported CuCeOx catalysts by calcination of a hydrotalcite precursor. The catalysts were characterized by various techniques, revealing the formation of a mesoporous catalyst consisting of well-dispersed CuO-supported CuCeOx clusters with a high population of oxygen vacancies. The as-prepared catalyst showed excellent catalytic performance in the reduction of NO by CO, attributed to its high oxygen defect concentration facilitating redox reactions.
Article
Chemistry, Physical
Zhenhua Zhang, Liping Fan, Weiqi Liao, Feiyue Zhao, Cen Tang, Jing Zhang, Ming Feng, Ji-Qing Lu
Summary: By studying the CO oxidation catalyzed by CeO2-CuO/Cu2O nanocomposites with different CuO structures, it was found that the CuO-CeO2 interfaces in the CeO2-CuO/c-Cu2O (cubes) nanocomposites exhibit higher intrinsic activity, indicating that the active oxygen species originates from CuO. An active 13.2% CeO2-CuO/c-Cu2O(s) catalyst for CO oxidation was achieved on fine Cu2O cubes, possessing a high density of active sites.
JOURNAL OF CATALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Cheng Qian, Yong Liu, Huichao Cheng, Kun Li, Bin Liu, Xin Zhang
Summary: In this study, functionally graded cemented carbides with a multi-principal-element alloy binder were prepared. The results showed that a higher carbon content can increase the diffusion rate and channel of carbon, leading to improved mechanical properties of the carbides obtained at appropriate carburization temperatures.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yaojia Ren, Hong Wu, Bin Liu, Quan Shan, Sheng Guo, Zengbao Jiao, Ian Baker
Summary: A high hardness, crack-free AlCoCuFeNi high-entropy alloy with good corrosion resistance was successfully produced by spark plasma sintering and hot rolling. The alloy exhibited a fine and uniform microstructure, low anisotropy, good wear and corrosion resistance, and grain boundary sliding as the creep mechanism.
Article
Engineering, Mechanical
Yang Chen, Shuo Wang, Hui Feng, Weipeng Li, Bin Liu, Jia Li, Yong Liu, Peter K. Liaw, Qihong Fang
Summary: By conducting high-resolution transmission electron microscopy and random field theory informed discrete dislocation dynamics simulations, this study reveals the influence mechanism of heterogeneous lattice strain on the complex interaction between dislocations and dislocation loops in high entropy alloys (HEAs) under irradiation. The results show that lattice-strain-induced irradiation hardening decreases, in line with the excellent irradiation hardening resistance of HEAs observed in recent experiments. A new cross-slip mechanism is also discovered, involving the co-linear reaction between dislocations and rhombus perfect loops. This study provides insights into the mesoscopic-level irradiation damage behavior, guiding the development of advanced HEA materials for nuclear energy applications through the regulation of heterogeneous lattice strain.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Jing Peng, Jia Li, Bin Liu, Jian Wang, Haotian Chen, Hui Feng, Xin Zeng, Heng Duan, Yuankui Cao, Junyang He, Peter K. Liaw, Qihong Fang
Summary: Additive manufacturing is believed to open a new era in precise microfabrication. This study investigates the microstructure evolution of a prototype multi-principal-element alloy FeCrNi fabricated using selective laser melting (SLM) through experiment and simulation. The results reveal the growth of columnar crystals across cladding layers and the development of dense cellular structures in the filled crystal. At the micron scale, the constituent elements are evenly distributed, while at the near-atomic scale, segregation of Cr element is observed. Simulation results demonstrate changes in the solid-liquid interface and the formation of precipitates, microscale voids, and stacking faults due to the thermal gradient, resulting in residual stress in the SLMed structure. A microstructure-based physical model reveals the presence of strong interface strengthening in tensile deformation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Xinxin Lv, Ning Cao, LingJun He, Bin Liu, Haotian Sun, Wenting Qiu, Zhu Xiao, Yanbin Jiang, Shen Gong
Summary: A series of Cu-10Fe-xSi (x = 0, 0.8, 1.6 wt%) alloys were prepared and the effects of Si content and a novel multi-stage thermomechanical treatment on the microstructure, mechanical, electrical, and magnetic properties of the alloys were studied. The results showed that the Cu-10Fe-0.8Si alloy exhibited higher strength, magnetic permeability, and excellent electromagnetic shielding performance compared to the Cu-10Fe alloy. After peak aging treatment, the Cu-10Fe-0.8Si alloy demonstrated a tensile strength of 593.6 MPa, conductivity of 55.66% IACS, elongation of 22.8%, and relative magnetic permeability of 1.57. The addition of an appropriate amount of Si element resulted in the formation of a dual-scale FeSi phase in the alloy, which promoted the precipitation of Fe atoms and refined the alloy grains, thereby improving the strength and magnetic properties synergistically.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Na Li, Yuankui Cao, Ao Fu, Qian Xie, Yong Liu, Bin Liu
Summary: A precipitate-gradient Ti-W alloy with simultaneous high strength and high ductility was prepared by powder metallurgy and subsequent heat treatment. The high strength was mainly caused by solid strengthening and precipitation strengthening, while the gradient structure enhanced the strength through the generation of hetero-deformation induced stress. The good ductility and superior strain hardening capability were attributed to the activation of multiple deformation modes around the gradient interface during plastic deformation.
MATERIALS CHARACTERIZATION
(2023)
Article
Computer Science, Artificial Intelligence
Jian Liu, Na Song, Zhengde Xia, Bin Liu, Jinxiao Pan, Abdul Ghaffar, Jianbin Ren, Ming Yang
Summary: This paper analyzes the correlation and constraint relationship between the optical flow field and motion field of multi-view images to effectively reconstruct the angle domain of the light field based on sparse light field data. The proposed method can reconstruct texture, shadow, and color information in the light field of a long-baseline scene with high quality and is suitable for dense light field reconstruction in complex scenes.
PATTERN RECOGNITION
(2023)
Article
Nanoscience & Nanotechnology
Yaojia Ren, Bo Han, Hong Wu, Jianchuan Wang, Bin Liu, Bingqiang Wei, Zengbao Jiao, Ian Baker
Summary: For the first time, the formation of nanotwins and 9R phase were observed in ultrafine-grained Ti-5wt.%Cu alloys with an average lath width of 223 nm produced by laser powder bed fusion. The 9R phase originated from lath boundaries with Cu segregation and terminated at the other boundary of the lath. Deformation caused curvature of the lath boundaries and an increase in lath width, promoting the transition of the central 9R phase to nanotwins. This work provides a new route for in situ production of nanotwinned Ti by the laser melting-induced segregation of Cu.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Li Wang, Xiaopeng Liang, Bin Liu, Michael Oehring, Jonathan Paul, Jie Liu, Min Song, Florian Pyczak, Yong Liu
Summary: The interaction between dislocations and perovskite Ti3AlC precipitates in a titanium alloy was investigated. It was found that the Ti3AlC carbides can be sheared by dislocations, leading to the formation of stacking faults and crossed stacking fault configurations. These stacking faults are induced by the shear of Shockley partial dislocations and further extended along specific crystal planes.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Yang Gao, Zihan Yang, Haibo Xiao, Qian Lei, Bin Liu, Yong Liu
Summary: A Cu35Ni25Co25Cr15 high-entropy alloy (HEA) coating was deposited on a pure Cu substrate by plasma transfer arc (PTA) welding to enhance its surface hardness and wear resistance. The coating consisted of Cu-rich A1 phase and NiCoCr-rich γ' phase, with an apparent structural gradient and different microstructures in different zones. The coating exhibited improved interfacial bonding with increased welding current, but the hardness showed a non-monotonic trend. At a welding current of 150 A, the coating showed good metallurgical bonding with the Cu substrate and excellent wear resistance, especially at high temperatures.
Article
Engineering, Chemical
Shikun Li, Bin Liu, Xiao Jia, Min Xu, Ruoyu Zong, Xunfeng Li, Guohua Liu, Xiulan Huai
Summary: Understanding the relationship between the physical properties of composite components and thermal conductivity is crucial for improving overall heat-dissipation performance. A numerical simulation was conducted to investigate the anisotropic thermal conductivity and heat flux distributions of h-BN/nanofiber composite films. Factors such as the intrinsic thermal conductivity of the matrix and filler, filler geometry and orientation, and interface thermal resistance were considered. The study found that increasing the intrinsic thermal conductivity of the matrix and tuning the interface thermal resistance could enhance the thermal conductivity, while the contributions from increasing filler conductivity and length were limited.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Environmental Sciences
Xuemin Xing, Jihang Zhang, Jun Zhu, Rui Zhang, Bin Liu
Summary: Health monitoring is crucial for densely distributed urban infrastructures in rapidly progressing cities. A novel time-series InSAR process, based on the AWHPSPO algorithm and TELM, is proposed to address the limitations of PSI. The algorithm provides a reference for the control of the health and safety of urban infrastructures.
Article
Chemistry, Multidisciplinary
Yifan Chen, Feifeng Cao, Weiping Cheng, Bin Liu
Summary: This study proposes a new parameter-inversion model for estimating bed roughness in hydrodynamic models. A numerical experiment was conducted to analyze the impact of various factors on the accuracy of inversed roughness. The results show that increasing the number of measurement stations and observed data significantly improves the model's robustness, with an optimal parameter setting of 3 stations and 30 observed data. The proposed model provides a new approach to estimating bed roughness parameters and can improve the accuracy of water-level forecasting.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Xu Wang, Xiaofeng Li, Huiqi Xie, Touwen Fan, Li Zhang, Kaiyang Li, Yuankui Cao, Xiaohui Yang, Bin Liu, Peikang Bai
Summary: The effects of Al and La elements on the mechanical properties of CoNiFe0.6Cr0.6 high-entropy alloys with a face-centered cubic structure were investigated using first-principles calculations. The study discussed in detail the variations of various physical parameters as a function of Al and La concentration. The results showed that the resistance to deformation decreased with the increase of Al and La concentration, while the plasticity and ductility of the alloys improved. The addition of Al and La also strengthened the metallic characteristic of atomic bonding and increased the material's anisotropy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Food Science & Technology
Shuailing Yang, Hui Xu, Jie-Hua Chen, Bin Liu, Ka-Wing Cheng
Summary: In recent years, there has been increasing interest in microalgal protein (MP), but its potential applications in the food industry have not been fully realized. This review evaluates the safety aspects, potential production strategies, and technologies of about 30 microalgal species commonly used for human consumption. The nutritional, biological, and techno-functional properties of MP are summarized, and challenges facing the industry are addressed. The review highlights the need for low-cost cultivation strategies, efficient protein purification techniques, and exploration of novel applications for MP.
FOOD AND BIOPROCESS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)
