Article
Chemistry, Multidisciplinary
Qianbing Wei, Chang Yu, Xuedan Song, Yiping Zhong, Lin Ni, Yongwen Ren, Wei Guo, Jinhe Yu, Jieshan Qiu
Summary: The study demonstrates the positive impact of water on the oxidation of benzyl alcohol on the Pd/MgAl-LDO catalyst, promoting reaction activity. The proportion of water significantly affects reactivity, and the water promotion effects can be verified through adsorption experiments and Raman spectroscopy.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
A. Lopez-Martin, M. F. Sini, M. G. Cutrufello, A. Caballero, G. Colon
Summary: This study analyzed the promoting effect of rhenium addition as a co-dopant in the Mo/ZSM-5 catalyst system. It was found that the sequential impregnation method affected the synergy between Mo and Re, and the catalyst with Re incorporated first showed higher aromatic yields and stability against deactivation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Junjie Chen, Chih-Han Liu, Hien N. Pham, Todd J. Toops, Abhaya K. Datye, Eleni A. Kyriakidou
Summary: By tuning the surface coverage of γ-Al2O3 nanosheets, ultrastable Pt/CeO2-Al2O3 nanosheet catalysts with improved low-temperature activity and stability were successfully synthesized based on the Sabatier principle of metal-support interaction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Lingcong Li, Nazmul H. Md Dostagir, Abhijit Shrotri, Atsushi Fukuoka, Hirokazu Kobayashi
Summary: The addition of Re to a Ru/Al2O3 catalyst changes the reaction mechanism, leading to increased production of CO for syngas, with Re playing a dual role in formate generation and steam reforming acceleration. Re is a main player in the catalytic reaction rather than a simple promoter.
Article
Chemistry, Multidisciplinary
F. M. Harth, B. Likozar, M. Grilc
Summary: This article discusses the application of rhenium as a catalyst in biomass conversion and the related deactivation mechanisms, detection methods, and coping strategies. It focuses on the correlation between rhenium leaching and catalyst deactivation, and systematically assesses the material properties, reaction conditions, and other factors influencing rhenium leaching. The article also presents insights into the detection of rhenium leaching and the correlation between leaching and catalyst deactivation, and proposes strategies for purposefully using rhenium leaching.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Applied
Zhiyan He, Xiaomei Ning, Guangxing Yang, Hongjuan Wang, Yonghai Cao, Feng Peng, Hao Yu
Summary: This article provides a comprehensive review of recent developments on glycerol selective oxidation over supported noble metal catalysts, with critical attention paid to the influence of metal-support and metal-metal interactions on the catalyst structure and performance, aiming for a better understanding of the reaction mechanism and rational catalyst design.
Article
Chemistry, Physical
Salwa Bader Alreshaidan, Ahmed A. Ibrahim, Anis H. Fakeeha, Abdulaziz M. Almutlaq, Fekri Abdulraqeb Ahmed Ali, Ahmed S. Al-Fatesh
Summary: The influence of five different supported catalysts on the CO2 reforming of methane to syngas was examined. The results showed that the catalyst support with the highest surface area provided the best catalytic activity.
Article
Chemistry, Multidisciplinary
G. E. Bekmukhamedov, V. I. Morozov, R. R. Tuktarov, M. S. Bukharov, S. R. Egorova, A. A. Lamberov, D. G. Yakhvarov
Summary: In this study, chromia-alumina catalysts were investigated using EPR spectroscopy. The activity of the catalysts in dehydrogenation reactions was found to be correlated with the amount of Cr3+ ions in the chromia phase. The increase in antiferromagnetic coupling energy between Cr3+ ions with concentration was shown, indicating that the exchange interaction between Cr3+ ions is more favorable for the dehydrogenation of i-butane compared to n-butane.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Multidisciplinary Sciences
Masoud Khani, Seyyed Ebrahim Mousavi, Reza Khalighi, Saeed Abbasizadeh, Hassan Pahlavanzadeh, Habib Ale Ebrahim, Abbas Mozaffari
Summary: This study aimed to develop a cobalt catalyst supported on alumina that can achieve high sulfur yield and maintain stability during usage, for the conversion of toxic gas SO2 into elemental sulfur using methane. Experimental tests revealed that the Al2O3-Co (15%) catalyst exhibited excellent catalytic performance, achieving a sulfur yield of 98.1% at 750 degrees C. However, a long-term stability test showed that sulfidation of Co3O4 occurred after a short while, resulting in a decrease in sulfur yield to 89.8%.
Article
Chemistry, Applied
Jean-Luc Dubois, Sandra Segondy, Georgeta Postole, Aline Auroux
Summary: This review summarizes the scientific literature data and patents on isobutanol, specifically focusing on the fermentation process and selective dehydration reaction to produce isobutene. The effects of different conditions on process design and catalyst performance are objectively analyzed and discussed. Thermodynamic equilibria and limiting step rates are provided for the reactants and products. Additionally, the impact of pressure on downstream recovery, catalyst stability, and reactor volume is discussed, as well as the purification of isobutene.
Article
Chemistry, Physical
Chenyang Shen, Kaihang Sun, Rui Zou, Qinglei Wu, Donghai Mei, Chang-jun Liu
Summary: In this study, the size of In2O3-supported rhenium (Re) catalysts was found to significantly impact the CO2 hydrogenation reaction. Atomically dispersed Re species with a positive charge on the Re/In2O3 catalyst surface showed high activity and stability for CO2 hydrogenation to methanol, while the presence of Re nanoclusters favored methane production. Catalyst characterization and theoretical calculations confirmed the influence of catalyst size on hydrogen activation and the selectivity of the CO2 hydrogenation reaction.
Article
Chemistry, Physical
Qi Li, Xuefeng Chu, Ya Wang, Qilei Yang, Ziang Su, Yue Peng, Wenzhe Si, Junhua Li
Summary: This study used YMn2O5 as a catalytically active support and prepared a dual-site catalyst, Pd/YMn2O5, which showed high CH4 catalytic activities in both dry and wet atmospheres. Experimental and theoretical studies revealed that the interactions between PdOx and YMn2O5 significantly enhanced the CH4 adsorption and lattice oxygen activity of the support.
Article
Energy & Fuels
Venkata D. B. C. Dasireddy, Blaz Likozar
Summary: This study prepared bimetallic Cu/Fe-based catalysts for the oxidation of methane to methanol, with HT Cu-Fe/Al2O3 exhibiting the highest activity. The catalytic process relied on metal atom dispersion and showed a direct chemosynthesis of alcohol, which was influenced by the oxidant molecule type used.
Review
Chemistry, Physical
Jinxiong Tao, Yuxi Liu, Jiguang Deng, Lin Jing, Zhiquan Hou, Lu Wei, Zhiwei Wang, Hongxing Dai
Summary: The emission of methane contributes to the greenhouse effect and environmental problems. Conventional palladium catalysts are unstable under harsh conditions, but zeolite-supported noble metal catalysts show promise. This review summarizes the development and characteristics of these catalysts for methane combustion and highlights the importance of high-performance catalysts under realistic conditions.
Article
Engineering, Chemical
Yuan Shu, Mengyao Wang, Xiaolan Duan, Dandan Liu, Shize Yang, Pengfei Zhang
Summary: Designing methane combustion catalysts operated under low temperature remains a challenge. In this study, a NiO catalyst with abundant oxygen vacancies and a high-specific surface area was successfully prepared using NaCl as a crystalline scaffold. The mesoporous NiO exhibited excellent CH4 combustion performance and the key role of surface lattice oxygen and reaction mechanism were revealed by various experiments. Furthermore, doping La improved the stability of NiO.