Article
Chemistry, Physical
Estela Ruiz-Lopez, Maria Ribota Pelaez, Maria Blasco Ruz, Maria Isabel Dominguez Leal, Marcela Martinez Tejada, Svetlana Ivanova, Miguel angel Centeno
Summary: Formic acid is an excellent hydrogen carrier and there is growing interest in the development of efficient and selective catalysts for its dehydrogenation. This study investigated heterogeneous catalysts based on mono- or bimetallic Pd/Ru for formic acid dehydrogenation reactions in both liquid- and vapor-phase conditions. The catalysts exhibited good catalytic activity and selectivity towards the dehydrogenation reaction, preventing the formation of undesired CO.
Article
Chemistry, Applied
Bowen Luo, Linxuan Zhou, Zhipeng Tian, Yao He, Riyang Shu
Summary: This study proposed a novel Ru-based biochar catalyst with a micro-mesoporous structure and N-doping. The catalyst showed good hydrogenolysis performance of cornstalk lignin in supercritical ethanol. The micro-mesoporous structure facilitated the dispersion of metal site and mass transfer, while N-doping promoted the interaction between the loaded Ru and the support.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Hong-Yan Ma, Gui-Chang Wang
Summary: This study reveals a strong relationship between the Ru-Ru coordination number and the CO2 methanation reactivity/selectivity. The selectivity for CH4 increases as the Ru coordination number increases from 3 to 5.5, with Ru4/Ru(0001) showing almost 100% selectivity for CH4. However, the selectivity for CO is higher on Ru ensembles with lower coordination numbers. Metal nanoparticles with more five-coordinated Ru-Ru configurations are suggested to be beneficial for CO2 methanation.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Eugenia Miguel-Casan, Mohanad D. Darawsheh, Victor Farina-Torres, Inigo J. Vitorica-Yrezabal, Eduardo Andres-Garcia, Martin Fananas-Mastral, Guillermo Minguez Espallargas
Summary: This study successfully synthesized a stable palladium-based metal-organic framework and demonstrated its excellent catalytic activity and selectivity in the Suzuki-Miyaura allylation of aryl and alkyl boronates. This has important implications for the development of efficient catalysts.
Article
Chemistry, Physical
Masashi Kikugawa, Yoshihiro Goto, Keisuke Kobayashi, Tetsuya Nanba, Hideyuki Matsumoto, Haruo Imagawa
Summary: The Ru/CeO2-PrOx catalyst system showed improved NH3 synthesis activity with an optimal range of Pr content, but excessive Pr doping hindered active site formation. The number of active sites in this system can be controlled by the Pr content.
JOURNAL OF CATALYSIS
(2022)
Review
Chemistry, Physical
Yuli Wei, Wu Yang, Zhiwang Yang
Summary: Mesoporous silicas (mSiO(2)), as versatile and excellent catalyst carriers, have been widely used for preparing supported catalysts with ideal catalytic properties. The uniform channels, adjustable pore size, high hydrothermal stability, and easy functional modification of mSiO(2) contribute to enhanced catalytic activity, selectivity, and cyclic lifespan. Additionally, the high adsorption capacity of mSiO(2) improves reactant molecule enrichment. The mesoporous structure of mSiO(2) pore walls ensures proper diffusion and prevents leaching of active components. This review provides a detailed introduction to the development and applications of mesoporous silica-based catalysts, particularly in hydrogenation reactions, esterification reactions, hydrogen production, and photo catalytic water splitting.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
L. F. Bobadilla, A. Munoz-Murillo, J. Gandara-Loe, A. Perez, O. H. Laguna, T. L. M. Martinez, A. Penkova, M. A. Centeno, J. A. Odriozola
Summary: This study focuses on the development of efficient catalysts for selective CO methanation in practical conditions. The results show that Rh significantly enhances the activity and selectivity, while Pt has a negative effect. These findings suggest that RuRh-based catalysts could be important for treating industrial-volume streams.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Shyamal Roy, Dilip Kumar Mondal
Summary: A novel catalyst Ru-Fe3O4/CeOx-SiO2 was synthesized via excess solution impregnation (ESI) method, which exhibited high degradation efficiency for phenol and phenol-containing wastewater at low temperatures. The preparation process and characterization results of the catalyst demonstrated its excellent catalytic activity and dispersion.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Multidisciplinary Sciences
Dmitry Galyamin, Jorge Torrero, Isabel Rodriguez, Manuel J. Kolb, Pilar Ferrer, Laura Pascual, Mohamed Abdel Salam, Diego Gianolio, Veronica Celorrio, Mohamed Mokhtar, Daniel Garcia Sanchez, Aldo Saul Gago, Kaspar Andreas Friedrich, Miguel A. Pena, Jose Antonio Alonso, Federico Calle-Vallejo, Maria Retuerto, Sergio Rojas
Summary: The study finds that low-ruthenium-content pyrochlores (R2MnRuO7, R = Y, Tb, and Dy) exhibit high activity and durability for the oxygen evolution reaction (OER) in acidic media. Among them, Y2MnRuO7 is the most stable catalyst, showing a voltage of 1.5 V at 10 mA cm(-2) for 40 h, or 5000 cycles up to 1.7 V. Experimental and computational results indicate that the excellent performance is attributed to the Ru sites embedded in RuMnOx surface layers. A water electrolyzer with Y2MnRuO7 and only 0.2 mgRu cm(-2) achieves a current density of 1 A cm(-2) at 1.75 V, remaining stable at 200 mA cm(-2) for over 24 h. These findings suggest further investigation on Ru catalysts with the goal of enhancing OER performance through a partial replacement of Ru with inexpensive cations. Ru-pyrochlores can serve as alternative anodes of PEM water electrolyzers, and their high performance is attributed to the Ru sites embedded in RuMnOx surface layers. The durability of a water electrolyzer with Y2MnRuO7 and only 0.2 mgRu cm(-2) has been successfully demonstrated.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Reyila Abuduwayiti, Feng-Yun Ma, Xing Fan
Summary: In this study, four supported catalysts were prepared and the Ni-Ru/HZSM-5 catalyst showed the best catalytic performance for the hydro-conversion of model compounds and lignite extraction residue. Moreover, the catalytic treatment effectively reduced the oxygen content in the products.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Applied
Christina Wildfire, Victor Abdelsayed, Dushyant Shekhawat, Robert A. Dagle, Stephen D. Davidson, Jianli Hu
Summary: In this study, microwave synthesis of ammonia over Ru/MgO catalysts was conducted at 320℃ under ambient pressure with different Ru loading levels. Higher Ru loading showed better dispersion, leading to decreased sintering and enhanced activity and stability. The microwave reactor also offered faster catalyst recovery compared to traditional thermal convectional Haber Bosch (HB) technology.
Article
Chemistry, Applied
Lijie Zhang, Yongzhao Wang, Yanling Yang, Bingsen Zhang, Shuai Wang, Jingdong Lin, Shaolong Wan, Yong Wang
Summary: RuFe/CeO2 catalysts show high activity and selectivity in the hydrodeoxygenation of diphenyl ether, with iron's oxophilic nature promoting the hydrogenolysis of C-O bonds to form benzene and phenol while inhibiting the hydrogenation of aromatic rings. The weak adsorption of aromatic rings on the RuFe alloy surface compared to Ru leads to reduced hydrogenation of arenes.
Article
Chemistry, Physical
Caijun Ma, Jiachao Duan, Yan Fu, Jie Chang
Summary: In this study, MOFs supported Pd catalysts were synthesized for H-2 generation from FA. The 10% Pd/MOF-Cr catalyst showed remarkable performance, while the introduction of Ni in the subsequent work led to the preparation of highly active and durable 10% Ni0.4Pd0.6/MOF-Cr catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Hanyu Hu, Jiahan Zhao, Jiangbo Xi
Summary: This paper reports a facile one-pot method to synthesize a dual-active-component assembly catalyst (DACAC) and successfully construct a catalytic continuous flow system. The catalyst possesses dual-active-components and hierarchical architecture, exhibiting excellent catalytic efficiency in nitroarene reduction and phenylboronic acid oxidative hydroxylation reactions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Chongya Yang, Tianyu Zhang, Yusen Chen, Weijue Wang, Hongying Zhuo, Xiaofeng Yang, Yanqiang Huang
Summary: By using the atomic layer deposition (ALD) technique to deposit alumina on the Ru/SiC model nanocatalysts, the corrugated (1011) surface of Ru nanoparticles can be selectively insulated, and the intrinsic activity of CO2 conversion was found to depend on the residual planar (0001) surface. The competitive kinetics of H2 and CO2 activation on the Ru surface govern the activity and selectivity of methanation. The terrace sites of Ru nanocatalysts serve as the active site through the HCOO* intermediate, while the (1011) surface has a negligible contribution toward methanation due to its preference for CO2 adsorption and surface poisoning.
