Article
Chemistry, Physical
Hanan A. Ahmed, Ahmed E. Awadallah, Ateyya A. Aboul-Enein, Sanaa M. Solyman, Noha A. K. Aboul-Gheit
Summary: The study developed and examined bimetallic Ni-Mo catalysts supported on CeO2 and CeO2-SiO2 for CH4 decomposition, revealing the influence of SiO2 on catalytic efficiency. Ni-Mo/CeO2 catalyst demonstrated exceptional decomposition behavior and durability, with high hydrogen yield.
Article
Chemistry, Physical
Junjie Chen, Kevin Giewont, Eric A. Walker, Jungkuk Lee, Yubiao Niu, Eleni A. Kyriakidou
Summary: Incorporating cobalt (Co) into Pd/BEA catalyst can substantially enhance CH4 oxidation performance at low temperatures, with experimental evidence and DFT calculations explaining the promotion mechanism.
Article
Chemistry, Physical
Natalia Diaz Montenegro, William S. Epling
Summary: The methane oxidation and oxygen storage capacity of a bilayer Pt/Pd/Al2O3 over a Mn0.5Fe2.5O4 spinel catalyst under periodic conditions were studied before and after SO2 exposure. Improvement in CH4 oxidation conversion was observed under periodic conditions compared to steady-state conditions before sulfur exposure. After sulfur exposure, a loss in CH4 oxidation performance and oxygen storage capacity of the spinel material was observed, but regeneration methods under periodic conditions led to improved CH4 conversion.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Olga Stonkus, Lidiya Kibis, Elena Slavinskaya, Andrey Zadesenets, Ilia Garkul, Tatyana Kardash, Andrey Stadnichenko, Sergey Korenev, Olga Podyacheva, Andrei Boronin
Summary: The application of composite materials as catalysts for air purification by oxidizing CO and other toxic compounds is promising. This study investigated composites of palladium and ceria components supported on carbon nanotubes, carbon nanofibers, and Sibunit in the oxidation reactions of CO and CH4. The results showed that carbon nanomaterials stabilize the deposited components in a highly-dispersed state, forming nanoparticles, clusters, and atoms. The interblock contacts between nanoparticles have an important effect on oxygen transfer, which influences the catalytic activity. The optimal combination of dispersed species and nanoparticles in the CNTs-based catalyst makes it highly effective in both studied reactions.
Article
Chemistry, Physical
Woo-Ju Jeon, Hyunsub Kim, Song-Ho Byeon
Summary: In this study, nanoceria with controllable surface Ce3+/Ce4+ ratios were synthesized using aqueous solutions without the use of surfactant organic molecules or complexing agents. The pH of the solution was adjusted to increase the Ce3+ concentration on the surface of nanoceria, which is important for practical applications in biomedical systems. The stability of excess surface Ce3+ ions was enhanced by embedding ceria nanoparticles in the mesopores of silica.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Shiyuan Chen, Songda Li, Ruiyang You, Ziyi Guo, Fei Wang, Guanxing Li, Wentao Yuan, Beien Zhu, Yi Gao, Ze Zhang, Hangsheng Yang, Yong Wang
Summary: The structure of PdOx nanoparticles loaded on CeO2 nanocrystals of different shapes was systematically studied using Cs-corrected HRTEM/STEM, XPS, and Raman spectroscopy. The active sites for methane catalytic oxidation were found to be morphology-dependent on the CeO2 supports, with Pd2+ species identified as the active centers. Additionally, the chemical states of Pd can be tuned through interactions with CeO2 in oxidizing/reducing atmospheres.
Article
Chemistry, Physical
Sabrina Ballauri, Enrico Sartoretti, Min Hu, Carmine D'Agostino, Zijuan Ge, Liang Wu, Chiara Novara, Fabrizio Giorgis, Marco Piumetti, Debora Fino, Nunzio Russo, Samir Bensaid
Summary: This study presents an improved design for Pd/Ce-Pr catalysts, showing that the PdO-PrOx interaction in materials with high praseodymium content results in lower activity, while a limited amount of Pr in ceria can lead to a more active catalyst. The simultaneous presence of Pd in its reduced and oxidized forms is a key factor for high activity, and the higher hydrophobicity of the sample significantly reduces the H2O inhibition effect typical of Pd-based materials.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Applied
R. P. Borges, L. G. Moura, S. Kanitkar, J. J. Spivey, F. B. Noronha, C. E. Hori
Summary: The study found that the silica molar content in Ni/CeO2-SiO2 catalyst significantly affects its performance, with higher silica content leading to larger surface area and smaller Ni crystallite size. Silica content also influences the metal-support interaction, ceria dispersion, and reducibility. Experimental results showed that Ni75CS catalyst performed the best during propane steam reforming.
Article
Multidisciplinary Sciences
Ningdong Feng, Huiwen Lin, Hui Song, Longxiao Yang, Daiming Tang, Feng Deng, Jinhua Ye
Summary: In this study, the photocatalytic conversion of CH4 into CH3OH on Ag-decorated facet-dominated TiO2 with high yield and selectivity is achieved, showing a key role of oxygen vacancies generation on {001} in avoiding overoxidation. The research comprehensively clarifies the underlying mechanism and presents distinct reaction pathways on {001} compared to {101} TiO2, leading to enhanced selectivity and yield.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Yongwei Chen, Sol Ahn, Mohammad Rasel Mian, Xingjie Wang, Qing Ma, Florencia A. Son, Lifeng Yang, Kaikai Ma, Xuan Zhang, Justin M. Notestein, Omar K. Farha
Summary: Solid supports play a crucial role in heterogeneous catalysis, but their specific effects remain challenging to elucidate. In this study, metal-organic frameworks (MOFs) with 8-connected Zr-6 nodes were used as supports to deposit molybdenum(VI) and investigate the effects of pore environment and topology on the resulting catalysts. It was found that by modulating the chemical environments of the deposited molybdenum species, the catalytic activity and structure can be changed. This work demonstrates the importance of using MOF supports to construct heterogeneous catalysts and elucidate structure-activity relationships in reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(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
Rukiye Babacan Tosun, Kadriye Ozlem Hamaloglu, Cengiz Kavakli, Pinar Akkas Kavakli, Ali Tuncel
Summary: A reusable catalyst with dual active center was synthesized for the first time, using iridium oxide nanoparticles immobilized on monodisperse porous manganese oxide microspheres. The catalyst showed maximum activity in water oxidation when synthesized with Mn5O8 microspheres, and the catalytic activity was correlated with the oxidation states of manganese oxide. Oxygen evolution up to 244 mmol was achieved in 30 min, with maximum TON and TOF numbers obtained as 298 and 557 h(-1) respectively, demonstrating excellent reusability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Qiang Gao, Jianzhong Zhao, Jian Guan, Chi Zhang
Summary: The study examines the memory effect on the synthesis of CO2/CH4 mixed gas hydrate and its impact on factors such as induction time, gas consumption rate, change of gas components, and separation factor. The memory effect shortens the induction time of the second synthesis and is influenced by decomposition time and pressure. It improves the nucleation rate and CO2 selectivity, providing a novel approach for mixed gas separation via hydrate method.
Article
Chemistry, Multidisciplinary
Zhongshan Yang, Qiqi Zhang, Liteng Ren, Xin Chen, Defa Wang, Lequan Liu, Jinhua Ye
Summary: Record ethanol production rate of 281.6 lmol g(-1) h(-1 was achieved for the photocatalytic conversion of methane over nitrogen vacancy-rich carbon nitride at room temperature. Systematic studies demonstrated that CH4 activation was done by highly reactive (OH)-O-center dot radicals generated from the photoreduction of O-2 with H2O.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yunhao Wang, Gurong Shen, Wei Xiong, Jianqiang Wang, Chen Wang, Meiqing Shen
Summary: This study investigates the silica-to-alumina ratio (SAR) effect on lean methane oxidation over Pd/Beta catalysts. The results show that Pd/Beta402 exhibits the highest activity among all samples. Through various experiments and analyses, it is found that the acidity of Pd/Beta catalysts is the major factor influencing their activity, with increasing SAR leading to lower acidity. This results in less formation of inactive Pd2+ and higher hydrophobicity, which benefits methane oxidation. However, increasing SAR also leads to larger PdO particles and a decrease in the amount of exposed PdO, which is detrimental to methane oxidation.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Shiva Fazlikeshteli, Xavier Vendrell, Jordi Llorca
Summary: Monometallic Pd and Ni and bimetallic Pd-Ni catalysts supported on CeO2 were prepared and tested for syngas production by the partial oxidation of methane. Bimetallic Pd-Ni/CeO2 catalysts exhibited higher methane conversion and syngas yield compared to monometallic Ni/CeO2 and Pd/CeO2. The bimetallic catalysts prepared by ball milling showed syngas production at lower temperatures. Various preparation parameters were examined, and the best performance was achieved with a bimetallic catalyst prepared at 50 Hz for 20 min, containing only 0.12 wt% Pd and 1.38 wt% Ni. Stability tests demonstrated superior stability for mechanochemically prepared bimetallic Pd-Ni/CeO2 catalysts. The results suggest that the impressive dispersion of metal species and strong interaction with the CeO2 surface contribute to the improved performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Environmental Sciences
Sajid Hussain, Eleonora Aneggi, Clara Comuzzi, Diego Baderna, Daniele Zuccaccia, Alessandro Trovarelli, Daniele Goi
Summary: Landfill leachates are highly contaminated liquid waste and their treatment is challenging. This study focuses on developing simpler and faster tools for evaluating the treated waste and for preliminary screening of Fenton process conditions. Several analytical techniques, including UV-vis spectroscopy, AOX analysis, and H-1 NMR analysis, were used to assess the reduction of toxicity and degradation of contaminants. The results demonstrate the effectiveness of the investigated tool for preliminary evaluation of detoxification efficacy.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Patrizia Frontera, Angela Malara, Anastasia Macario, Mariachiara Miceli, Lucio Bonaccorsi, Marta Boaro, Alfonsina Pappacena, Alessandro Trovarelli, Pier Luigi Antonucci
Summary: In this study, the catalytic behavior of nickel-based catalysts supported on ceria/zirconia, undoped and doped with lanthanum and neodymium, was investigated under steam reforming, partial oxidation and autothermal reforming reactions of different fuels. The catalytic properties were evaluated at a temperature of 800 degrees C, under atmospheric pressure, using steam/carbon and oxygen/carbon ratio, respectively, of S/C = 2.5 and O/C = 0.5. The doped catalyst showed better catalytic performance and resistance to deactivation due to improved distribution of nickel species and higher concentration of defect groups and oxygen vacancies on the catalyst surface.
Article
Chemistry, Physical
Maila Danielis, Juan D. Jimenez, Ning Rui, Jorge Moncada, Luis E. Betancourt, Alessandro Trovarelli, Jose A. Rodriguez, Sanjaya D. Senanayake, Sara Colussi
Summary: In this study, CO2 methanation reactivity, reaction mechanism, and surface structure were investigated on a mechano-chemically prepared Pd/CeO2 catalyst. The oxidative pretreatment increased methane yield by a factor of two compared to the reductive pretreatment. Methanation rates were maintained for over 48 h and increased further upon oxidative regeneration treatments. Various in situ spectroscopic techniques were used to gain insights into the CO2 hydrogenation mechanism, leading to a deeper understanding of the direct CO2 reduction towards methane and CO over mechanochemically prepared Pd/CeO2 catalysts.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Engineering, Chemical
Patrizia Frontera, Angela Malara, Marta Boaro, Andrea Felli, Alessandro Trovarelli, Anastasia Macario
Summary: Ruthenium/nickel ex-solved perovskite catalysts were synthesized and characterized for ethanol autothermal reforming. The catalysts exhibited high ethanol conversion and hydrogen yield, with the SFMN/0.5Ru catalyst containing 0.5 wt% Ru showing the best performance. Increasing the amount of Ru in the catalyst resulted in reduced hydrogen yield and increased coke deposition.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Biochemistry & Molecular Biology
Jaroslaw Serafin, Jordi Llorca
Summary: In this study, four different nanoshapes of cerium dioxide were prepared and decorated with various metals. Adding metals to cerium dioxide enhanced its ability to release oxygen and reduce CO2. The best catalyst, 2% Ni/CeO2-rods prepared by ball milling, showed the highest CO2 splitting value (412 μmol/g(cat)) and confirmed its good redox ability with H-2 consumption (453.2 μmol/g(cat)).
Article
Nanoscience & Nanotechnology
Andrea Braga, Marina Armengol-Profitos, Laia Pascua-Sole, Xavier Vendrell, Lluis Soler, Isabel Serrano, Ignacio J. Villar-Garcia, Virginia Perez-Dieste, Nuria J. Divins, Jordi Llorca
Summary: The catalytic performance and mechanism of Ni-Fe nanocatalysts supported on CeO2 for methane steam reforming were investigated. It was found that the dry ball milling method resulted in a higher amount of defective carbon on the surface of the catalysts, which improved their coke resistance.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Eleonora Aneggi, Filippo Campagnolo, Daniele Zuccaccia, Walter Baratta, Jordi Llorca, Alessandro Trovarelli
Summary: This study investigates the solvent-free oxidation of benzyl alcohol using air as an oxidant in the presence of ruthenium supported on alumina and zirconia. The catalyst shows good activity and complete selectivity, meeting the requirements for atom economy and environmental sustainability. The materials are stable and maintain high activity after recycling.
Article
Chemistry, Multidisciplinary
Abdulaziz Aldureid, Daniel Montane, Jordi Llorca, Francesc Medina
Summary: Ni-Mg/Al mixed oxide catalysts derived from LDHs exhibited excellent performance in the one-pot production of tetrahydrofurfuryl alcohol (TFA) from furfural (FF).
CHEMISTRY-SWITZERLAND
(2023)
Article
Chemistry, Physical
Sonia Garcia-Gomez, Javier Gimenez, Ignasi Casas, Jordi Llorca, Joan De Pablo
Summary: The influence of GdIII doping on the surface oxidation of UO2 was investigated in situ by XPS. It was found that doping UO2 with Gd2O3 completely inhibited the oxidation of UO2 in absence of porosity. However, for porous samples, the oxidation of UO2 in presence of Gd2O3 depended strongly on the surrounding gas atmosphere.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Nuria Martin, Francisco G. Cirujano, Eduardo Garcia-Verdugo, Jordi Llorca, Enrique del Rio, Ignacio Jimenez-Morales, Adrian Bogeat-Barroso, Elena Lopez-Maya, Mayra G. Alvarez
Summary: The introduction of iron ionic sites by metal exchange improves the activity of nickel materials and enables control over hydrogen peroxide activation.
Article
Nanoscience & Nanotechnology
Shasha Ge, Yufen Chen, Xuan Tang, Yali Shen, Yang Lou, Li Wang, Yun Guo, Jordi Llorca
Summary: In this study, Pt nanoparticles with different morphologies were loaded on CeO2 catalysts to investigate their effect on the oxidation of propane. The Pt/CeO2 catalyst with {111} facets showed higher catalytic activity compared to the Pt/CeO2 catalyst with {110} and {100} facets. XPS and DRIFTS analysis revealed that the excellent performance of Pt/CeO2 catalyst with {111} facets is attributed to the prevalence of metallic Pt species, which promotes C-C bond cleavage and facilitates the removal of surface formate species. The findings of this study provide insights into the mechanism of propane oxidation on different nanoshaped Pt/CeO2 catalysts.
ACS APPLIED NANO MATERIALS
(2023)
Article
Multidisciplinary Sciences
Tijani Hammedi, Rahma Bensouilah, Abdelkader Ouakouak, Jordi Llorca, Francisco Medina Cabello, Zouhaier Ksibi
Summary: This study investigated the catalytic wet air oxidation of p-hydroxybenzoic acid using Ru-based catalysts supported on various materials. The physicochemical properties of the catalysts were analyzed using various characterization techniques. The presence of cerium was found to enhance the catalytic activity by increasing the surface-active oxygen through a redox process.
Article
Chemistry, Inorganic & Nuclear
Sonia Garcia-Gomez, Javier Gimenez, Ignasi Casas, Jordi Llorca, Joan De Pablo
Summary: The dissolution rates of non-doped UO2 and UO2 doped with Gd2O3 were studied under different pH conditions. It was found that non-doped UO2 had a low dissolution rate under high alkaline conditions but increased significantly when the pH decreased to 9. XPS analysis confirmed the effect of bicarbonate on the dissolution of UO2. The doping of Gd2O3 did not affect the dissolution rates, and it was attributed to the retardation of U(v) oxidation by gadolinium.
DALTON TRANSACTIONS
(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)