Article
Chemistry, Physical
Fengzhi Fu, Yanan Liu, Yinwen Li, Baoai Fu, Lirong Zheng, Junting Feng, Dianqing Li
Summary: This study successfully enhanced the catalytic activity and selectivity of non-noble metal catalysts in the selective hydrogenation of acetylene by constructing an FeyMgOx-modified Cu interfacial structure. Through mechanism analysis, the roles of interfacial Cu and Fe atoms in the hydrogenation process were confirmed.
Review
Chemistry, Physical
Luiz H. H. Vieira, Leticia F. Rasteiro, Cassia S. Santana, Gabriel L. L. Catuzo, Alisson H. M. da Silva, Jose M. Assaf, Elisabete M. M. Assaf
Summary: Following advances in capture technologies, utilizing low-cost renewable H-2 in catalytic hydrogenation for CO2 utilization shows great potential in reducing the carbon footprint of industrial processes by providing valuable chemicals and fuels. However, the scalability and economic viability of these processes heavily rely on the development of efficient catalysts. This review summarizes recent progress in noble metal-based heterogeneous catalysts for the thermocatalytic conversion of CO2 into various products, highlighting their impact on catalyst properties and discussing challenges and potential future research opportunities.
Article
Chemistry, Physical
Claudia E. Berdugo-Diaz, Yang Sik Yun, Melissa T. Manetsch, Jing Luo, David G. Barton, Xue Chen, David W. Flaherty
Summary: The direct reduction of esters to ethers offers an efficient pathway to obtain ethers from renewable intermediates. This study elucidates the reaction pathways of propyl acetate in the presence of hydrogen over Pd nanoparticles supported on high-surface area Nb2O5. The results show that esters react via three primary pathways, leading to the formation of different products. The formation of ethers is not affected by the pressure of C5H10O2 but is dependent on the pressure of H-2.
Article
Chemistry, Multidisciplinary
Claudia E. Berdugo-Diaz, Melissa T. Manetsch, Yang Sik Yun, Jieun Lee, Jing Luo, Xue Chen, David W. Flaherty
Summary: Esters can be reduced to ethers and alcohols through C-O bond cleavage by hydrogenation and hydrogenolysis pathways on Bronsted acidic faujasite (M-FAU) supported metal nanoparticles. The rates and selectivities of each pathway are influenced by the metal identity (M=Co, Ni, Cu, Ru, Rh, Pd, and Pt). Pt-FAU catalyst exhibits propyl acetate consumption rates up to 100 times higher than other M-FAU catalysts and achieves a 34% selectivity for ethyl propyl ether. The reduction of esters appears to involve a bifunctional mechanism, with stepwise addition of H* atoms to the carbonyl to form hemiacetals on the metal sites, followed by hemiacetal diffusion to Bronsted acid sites for dehydration to ethers or decomposition to alcohol and aldehyde. The reduction rates of propyl acetate seem to be determined by H* addition to the carbonyl and C-O cleavage of hemiacetal.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Inorganic & Nuclear
Jhonatan Luiz Fiorio, Marco A. S. Garcia, Maite Lippel Gothe, Diego Galvan, Paula Castellani Troise, Carlos A. Conte-Junior, Pedro Vidinha, Pedro H. C. Camargo, Liane M. Rossi
Summary: Noble metals nanoparticles (NPs) and single atoms (SAs) supported on nitrogen-doped carbon (NC) materials exhibit remarkable activity and selectivity, with the ability to finely tune the physical and chemical properties of the catalysts. The precise control of the coordination environment in the host support allows for the design of efficient noble metal catalysts with optimized active centers. This review discusses recent progress in catalysis by noble metals supported on N-doped carbon materials, covering various catalytic systems and exploring structure-performance relations.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Inorganic & Nuclear
Changzhen Wang, Xueqing Hai, Jia Li, Yupeng Liu, Xiaosheng Yu, Yongxiang Zhao
Summary: By varying the reduction temperature, the structure of NiCu-phyllosilicate catalysts can be adjusted to selectively regulate the Ni(Cu)-L acid cooperative active sites, thereby improving the hydrogenation activity and selectivity of 1,4-butynediol.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Baoai Fu, Alan J. McCue, Yanan Liu, Shaoxia Weng, Yuanfei Song, Yufei He, Junting Feng, Dianqing Li
Summary: A strategy for fabricating a stable and site-isolated Ni catalyst was reported, where a Ni1MoS/Al2O3 sample exhibited high performance in the selective hydrogenation of acetylene due to its unique isolated Ni delta+ structure induced by Mo and S. This work opens up new opportunities for selective hydrogenation research by providing a feasible way to construct site-isolated catalysts with higher active metal loadings.
Article
Chemistry, Physical
Shuya Zhang, Xiaochen Liu, Yuanjie Xu, Yu Tang
Summary: This study investigates the production of methane from biomass molecules using hydrogenation techniques. The results show that reaction temperature and the type of nickel catalyst used significantly impact the hydrogenation pathways, with a shift towards hydrodeoxygenation at higher temperatures.
Review
Chemistry, Physical
Zhihui Wang, Wei Zhang, Cuiqing Li, Chen Zhang
Summary: Layered double hydroxides (LDHs) are widely used in various fields due to their unique structural advantages, and are capable of synthesizing metal catalysts with high metal dispersion, tunable acid-base properties, and strong metal-support interaction. LDH-derived materials show great potential as catalysts in hydrogenation and hydrogenolysis reactions, as indicated by the rapid development in this field with over 200 papers published in the past five years. This review comprehensively discusses the applications of LDH-derived materials as catalysts in different hydrogenation and hydrogenolysis reactions, showcasing their extraordinary potentials in these reactions and their future significance.
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.
Review
Nanoscience & Nanotechnology
Al-Mahmnur Alam, Young-Seok Shon
Summary: This article summarizes a variety of interesting catalytic studies employing solubilized and freely movable noble metal nanoparticle catalysts for organic reactions in water-based systems. The impact of different ligands on the catalytic activity and selectivity of semi-heterogeneous nanoparticles in water is discussed in detail, with a categorization based on synthetic method and type of reaction. Systems using polymers, dendrimers, and ionic liquids as supporting or protecting materials are excluded from the review.
ACS APPLIED NANO MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Rasika Mane, Yukwon Jeon, Chandrashekhar Rode
Summary: The importance of developing alternative green technologies for energy and chemical production, specifically through glycerol hydrogenolysis, is discussed. The review focuses on the influence of catalyst properties on product selectivity, the role of reaction parameters, and recent progress in non-noble metal-catalyzed glycerol hydrogenolysis. Further, the potential commercialization of the process is highlighted, with a discussion on catalyst stability and co-product formation being considered critically.
Article
Nanoscience & Nanotechnology
Shedrack G. Akpe, Sun Hee Choi, Hyung Chul Ham
Summary: This study investigates the direct C-2-C-3 bond-cleaving activity of xylitol using first-principles calculations. The results show that C-C bond scission of xylitol appears to be impossible on single-crystal catalysts (SCCs), while single-atom catalysts (SACs) demonstrate higher activity. Electronic structure calculations reveal an up-shift in DOS for surface M-1 atoms in SACs, resulting in higher d-band center and stronger adsorbate binding. This study highlights the importance of SACs in boosting atom efficiency of costly metals and tuning catalytic reaction activity.
Article
Energy & Fuels
Shiva Fazlikeshteli, Xavier Vendrell, Jordi Llorca
Summary: In this study, monometallic Ru, Pd, and bimetallic Ru-Pd catalysts were prepared via mechanochemical and conventional incipient wetness impregnation methods and used in the partial oxidation of methane (POM). The results showed that bimetallic catalysts exhibited higher catalytic activity and stability compared to monometallic ones, and the catalysts prepared by mechanochemical method produced synthesis gas at a lower temperature compared to conventional catalysts.
Article
Biotechnology & Applied Microbiology
Kseniia V. Vikanova, Marina S. Chernova, Elena A. Redina, Gennady Kapustin, Olga P. Tkachenko, Leonid M. Kustov
Summary: The study demonstrates that ultra-low-loaded supported Pt catalysts exhibit extremely high activity in the selective hydrogenation of 5-HMF, with 0.1% Pt/CeO2-ZrO2 catalyst showing the highest yield and selectivity for BHMF without the need for alkali or other additives.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)