Article
Chemistry, Multidisciplinary
Tong Jiao, Xue-lian Xu, Lei Zhang, You-yun Weng, Yu-bing Weng, Zhi-xian Gao
Summary: Hydrogen proton exchange membrane fuel cell is considered a clean and efficient way of utilizing hydrogen energy, but high storage and transportation costs hinder its development. On-site hydrogen production from methanol steam reforming can solve this issue, and monolithic catalysts show better activity in high space velocity methanol steam reforming reactions.
ACTA CHIMICA SINICA
(2021)
Article
Nanoscience & Nanotechnology
Nayeem Ahmad Pandit, Tokeer Ahmad
Summary: CeO2 and ZrO2 nanospheres were prepared by hydrothermal synthesis and ZrO2-CeO2 nanocomposite heterostructures with different weight percent ratios were obtained through mechanical means. The as-synthesized metal oxides and nanocomposites were characterized using various techniques, revealing the smaller band gaps and enhanced surface areas of ZrO2-CeO2 composites compared to pure CeO2. A 7.5% ZrO2-decorated CeO2 nanocomposite showed remarkable enhancement in gas sensing performance. The improved properties were attributed to the decrease in band gap, increased surface area, the presence of oxygen vacancies on ZrO2 surface, and the formation of ZrO2-CeO2 heterojunctions.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
M. R. Kosinski, A. J. Vizcaino, L. M. Gomez-Sainero, A. Carrero, R. T. Baker
Summary: Catalysts of 2 wt% Pd/Sm-doped Ceria were prepared and evaluated for hydrogen production by methanol reforming. Among the three preparation methods, Method B resulted in the best activity and CO2 selectivity due to the superior nanostructure of the catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Akash Kaithal, Basujit Chatterjee, Christophe Werle, Walter Leitner
Summary: The acceptorless dehydrogenation of methanol to carbon monoxide and hydrogen using homogeneous molecular complexes, particularly those containing ruthenium and manganese with the MACHO ligand framework, showed promising catalytic activities. The metal complex was found to mediate the initial fast dehydrogenation of methanol to formaldehyde and methyl formate followed by subsequent slow decarbonylation, resulting in gas mixtures with varying CO/H2 ratios.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Maria Portarapillo, Danilo Russo, Gianluca Landi, Giuseppina Luciani, Almerinda Di Benedetto
Summary: Green syngas production is a sustainable energy development goal, and thermochemical H2O/CO2 splitting technology shows great promise. Research indicates that K-doped systems can enhance the redox properties of CeO2-ZrO2 systems, improving efficiency and repeatability in CO2 splitting.
Article
Chemistry, Physical
Linxi Wang, Shyam Deo, Ahana Mukhopadhyay, Nicholas A. Pantelis, Michael J. Janik, Robert M. Rioux
Summary: Experimental kinetics demonstrate that catalytic lean CO oxidation over single Pd atoms exhibits a CO reaction order greater than unity, which is unique to Pd single atoms supported on CeO2 nanocubes. The ability of Pd atoms to access multiple formal oxidation states is the key factor in this emergent redox behavior. A microkinetic model and density functional theory calculations support the experimental findings and provide insights into the reaction mechanism.
Article
Chemistry, Physical
Maxim Zabilskiy, Kaibo Ma, Arik Beck, Jeroen A. van Bokhoven
Summary: In this research, high surface area ceria-zirconia synthesized by a glycothermal approach was used as a support for copper nanoparticles, leading to the successful preparation of Cu-CeO2/ZrO2 catalysts that exhibit high efficiency in the conversion of carbon dioxide to methanol. The catalyst with 5 wt% copper showed the highest activity and mass utilization of copper.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Energy & Fuels
Weijun Qiao, Shuqian Yang, Lei Zhang, Yuan Tian, Honghao Wang, Caishun Zhang, Zhixian Gao
Summary: Different divalent metals were used to prepare Cu-Ce/M-Al catalysts for hydrogen production from methanol steam reforming, with Ce-Cu/Zn-Al catalyst showing the best performance. The dispersion, reduction temperature, and oxygen vacancies on the surface played key roles in determining the catalytic performance of the catalysts. At optimal conditions, the methanol conversion reached 100% and the H-2 production rate was 779.7 STP cm(3) kg(-1) s(-1).
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Multidisciplinary Sciences
Sharif F. Zaman, Abdulrahim Al-Zahrani, Aibibula Bake
Summary: Partial methanol oxidation (POM) is a possible route for hydrogen generation in fuel cell-driven vehicles. Transition metals (Fe, Ni, Co, Cu, and Zn) were used as promoters over Au/CeO2-ZrO2 to catalyze the POM reaction. Among them, Zn-modified Au/CeO2-ZrO2 samples showed the highest yield for hydrogen (around 80%) with over 83% selectivity and less than 16% CO selectivity at 450 degrees C, making it a promising catalyst for the process.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Zhiyuan Qi, Luning Chen, Shuchen Zhang, Ji Su, Gabor A. Somorjai
Summary: Research has shown that the activity of Pt-1 / CeO2 catalyst surpasses that of CeO2 supported 2.5 nm Pt nanoparticles by 40-fold. The mechanism involves dissociative adsorption of methanol molecules on nanoceria support followed by diffusion onto Pt single sites for dehydrogenation, resulting in weakly bonded CO.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Mengchen Li, Jie Deng, Xinyi Yin, Wei Wang, Yi Zhao, Haidi Xu, Jianli Wang, Yaoqiang Chen
Summary: The study showed that adding lauric acid at the end of grain growth had no effect on the grain growth but modified the grain stacking mode, enhancing thermal stability of CZ. However, when lauric acid was added at the nucleation and growth stage, it inhibited the growth of certain crystal planes, resulting in anisotropic growth of other planes and contributing to the formation of oxygen vacancies, leading to improved catalytic activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Chemical
Moyu Liao, Hang Qin, Wenming Guo, Pengzhao Gao, Hanning Xiao
Summary: A CuO/ZnO/CeO2/ZrO2 catalyst slurry was prepared by mixing the catalyst powder, a polyvinyl alcohol aqueous solution, and glycerol. The catalyst was in situ reduced by glycerol during the loading process, leading to the integration of catalyst loading and reduction. The prepared catalyst showed excellent performance in methanol steam reforming with a high methanol conversion rate and hydrogen yield.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Physical
Shiyu Xu, Yunxia Cao, Zhiming Liu
Summary: CexZr1-xO2 catalysts were prepared by the sol-gel method and used for the direct synthesis of dimethyl carbonate (DMC) from CO2 and methanol. Ce0.8Zr02O2 catalyst exhibited the highest catalytic activity, which may be attributed to its highest concentration of oxygen vacancy sites.
CATALYSIS COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Linlin Yang, Xianming Guo, Yingzhi Ren, Rong Gu, Zhao-Xu Chen, Guixiang Zeng
Summary: The acceptorless dehydrogenation of methanol to produce carbon monoxide (CO) and dihydrogen (H2) mediated by MACHO-type 1-Ru and 1-Mn complexes was investigated. The 1-Ru-catalyzed process involves the formation of active species 4-Ru through a methanol-bridged H-2 release pathway. Methanol dehydrogenation by 4-Ru yields formaldehyde and 1Ru, followed by H-2 release to regenerate 4-Ru. The 1-Mn-catalyzed reaction has reduced efficiency compared to 1-Ru due to a higher Gibbs energy barrier in the rate-determining step.
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Sumit R. Patil, Viral N. Barhate, Vilas S. Patil, Khushabu S. Agrawal, Ashok M. Mahajan
Summary: The study investigates the effects of plasma-enhance atomic layer deposition (PEALD) on ZrO2/La2O3/ZrO2 (ZLZ) nanolaminates and the impact of different annealing temperatures. The film annealed at 400 degrees C exhibits a stable pyrochlore phase, resulting in the lowest leakage current density in the MIM capacitor. The research suggests that PEALD nanolaminated high-k MIM capacitors have potential applications in nanoelectronics.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
