Article
Engineering, Environmental
Lina Zhang, Jianhuang Wang, Baoquan Zhang, Zenan Lin, Lele Liu, Xianhua Zhang, Shuai Wang, Jingdong Lin, Haifeng Xiong, Chuanqiang Wu, Yong Wang, Shaolong Wan
Summary: PdZn beta alloy catalysts show high reactivity and CO2 selectivity in methanol steam reforming (MSR) reaction, which makes them a promising replacement for copper catalysts. The synthesized ZnFexAl2-xO4 support has a high surface area and superior stability, enabling the formation of PdZn beta alloy at low Pd loadings.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Qiuwan Shen, Zhongwen Cai, Xin Zhang, Gaokui Chen, Guogang Yang, Shian Li
Summary: A series of CuFexAl2-xO4 (0 < x < 2) spinel oxide catalysts were prepared for methanol steam reforming (MSR) via the sol-gel method. The catalytic performance of CuFexAl2-xO4 catalysts was studied by XRD, SEM, EDS, XPS, and Raman techniques. The influence of Fe doping on the catalysts was thoroughly investigated, showing that proper Fe doping improved the activity of the catalysts. Among the CuFexAl2-xO4 (0 < x < 2), CuFe1.2Al0.8O4 exhibited the best catalytic performance with hydrogen selectivity over 99% and CO selectivity less than 1%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Green & Sustainable Science & Technology
Venkata D. B. C. Dasireddy, Blaz Likozar
Summary: Nanocomposite Cu-Mn-O nano-particle (CuMnNP) and nano-sheet (CuMnNS) catalysts were successfully prepared via a one-step hydrothermal method without any templating reagent. CuMnNS showed enhanced crystal lattice oxygen reactivity and higher O2 adsorption/storage capacity compared to CuMnNP. Additionally, CuMnNS demonstrated superior catalytic activity in the preferential oxidation (PROX) pathway of CO.
Article
Chemistry, Physical
Ya-Jie Liu, He-Fei Kang, Xiao-Ning Hou, Shao-Jun Qing, Lei Zhang, Zhi-Xian Gao, Hong-Wei Xiang
Summary: The dynamic copper releasing process from a copper-aluminum oxide catalyst in methanol steam reforming was investigated. The results showed that copper could be liberated from the spinel structure and serve as the active species. The released copper atoms agglomerated into nano entities, and the number of these nanoparticles increased quasi-linearly with time on stream.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Pengpeng Li, Sheng Wang, Shudong Wang
Summary: The effects of Fe and Cr species on Cu-based supported and spinel oxide catalysts during methanol steam reforming (MSR) reaction and the Cu-Fe-Cr synergy were investigated. The addition of Fe and Cr had a significant promotion on MSR performance. CuFeCr catalyst possessed superior MSR behaviors with methanol conversion maintained above 80% during a time-on-stream stability of 100 h.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Ceramics
Kai Cui, Minghui Sun, Jinyang Zhang, Jiali Xu, Zhirou Zhai, Tianyu Gong, Linrui Hou, Changzhou Yuan
Summary: A universal and simple method was developed for the scalable synthesis of CuFe2O4 samples with spinel structure at low temperatures, with optimal experimental conditions obtained for high infrared emissivity. Under these conditions, CuFe2O4 exhibited high infrared emission values in the wavelength range of 3-5 μm. This work will provide significant guidance for the efficient preparation of spinel materials with excellent infrared emissivity, especially at low temperatures.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Xiaoning Hou, Shaojun Qing, Yajie Liu, Lei Zhang, Caishun Zhang, Gang Feng, Xiang Wang, Zhixian Gao, Yong Qin
Summary: The study successfully synthesized an efficient catalyst Cu1-xMgxAl3 ternary spinel oxide using a versatile and green method, showing promising performance in methanol steam reforming. The incorporation of magnesium into the spinel lattice helps to maintain stable catalytic performance and facilitate the in-situ formation of smaller nano copper metals.
Article
Chemistry, Applied
Arturo Claudio-Piedras, Rosa Ma. Ramirez-Zamora, Brenda C. Alcantar-Vazquez, Albina Gutierrez-Martinez, Gilberto Mondragon-Galicia, Fernando Morales-Anzures, Raul Perez-Hernandez
Summary: The study synthesized Pt nanocatalysts supported on CeO2-NR for hydrogen production via the steam reforming of methanol. The choice of Pt precursor had an impact on the catalyst's performance, with Pt/CeO2-NR(Nit) showing the best methanol conversion rates. The stability of the catalyst during the reaction was confirmed by real-time monitoring analysis using Mass Spectroscopy.
Article
Chemistry, Physical
Haiguang Wang, Yongfeng Liu, Jun Zhang
Summary: CuO/ZnO/Al2O3 catalysts were prepared using an oxalate precursor via co-precipitation method. Ethanol was found to influence the crystalline phase composition of the oxalate precursor. Microwave irradiation promoted isomorphous substitution between Cu2+ and Zn2+, forming the master phase (Cu,Zn)C2O4. After calcination, a solid solution Cu-O-Zn with nano-fibriform morphology was formed. The catalyst exhibited small CuO grains, a large surface area, and strong synergistic effects between CuO and ZnO, which improved the catalytic performance of methanol steam reforming.
Article
Engineering, Environmental
Weiqin Lu, Rongjun Zhang, Sam Toan, Ran Xu, Feiyi Zhou, Zhao Sun, Zhiqiang Sun
Summary: The study evaluated the impact of four different microchannel structures on the performance of methanol steam reforming, with the integrated structure incorporating sinusoidal waves and dimples demonstrating the best overall performance. Enhanced heat and mass transportation, as well as improved H2 production capacity, were observed in the integrated structure.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Guiru Zhang, Jiali Zhao, Taotao Yang, Qi Zhang, Li Zhang
Summary: The CuZnO catalyst with excellent low-temperature catalytic activity is widely used in methanol steam reforming, and the unique synergistic effect of Cu2O/ZnO on MSR has been found. This effect significantly reduces the activation energy of methoxy dehydrogenation.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Materials Science, Multidisciplinary
Omar A. Fouad, Mohamed M. S. Wahsh, Gehad G. Mohamed, Maher MI. Desssouky
Summary: To protect the environment, bagasse waste materials are now being recycled for the production of porous ceramics. The synthesis of nano tetragonal zirconia (t-ZrO2) and nano spinel (MgAl2O4) is achieved using a modified co-precipitation method. XRD, SEM-TEM, and BET analyses were conducted to examine the phase composition, particle size, and surface area of the synthesized nanoparticles, respectively. Alumina-nano t-ZrO2-nano spinel macroporous ceramics were prepared by adding nano t-ZrO2 and bagasse ash to calcined alumina, and sintering the samples at different temperatures. The phase composition, densification parameters, cold crushing strength, microstructure, and pore distribution in the sintered samples were investigated.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Energy & Fuels
Azita Etminan, S. K. Sadrnezhaad
Summary: In this study, mesoporous monometallic and bimetallic catalysts were synthesized and characterized. The results showed that the bimetallic catalyst had higher conversion and lower carbon deposition in methane steam reforming. The study also suggested that highly dispersed active Ni species might play an important role in the catalyst activity and resistance to coking in the reaction.
Article
Energy & Fuels
Ngoc Van Trinh, Younghyeon Kim, Hongjip Kim, Sangseok Yu
Summary: The study compares the effect of four different evaporator designs on the stable reforming of methanol-water mixtures, showing that the evaporator configuration is critical in performing stable reform reactions, especially for the flow-field mode of the evaporator. Additionally, a combination of both internal and external evaporation methods generates the highest performance for the methanol-reforming system, with methanol conversion reaching almost 98%.
Review
Engineering, Chemical
Apoorva M. Ranjekar, Ganapati D. Yadav
Summary: The hydrogen economy is actively developing, with methanol being a flexible alternative fuel of interest. Different metallic catalysts and their compositions play a crucial role in the steam reforming of methanol.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
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)