Journal ArticleDOI
Role of Metal–Support Interactions, Particle Size, and Metal–Metal Synergy in CuNi Nanocatalysts for H2 Generation
TLDR
In this article, the mesoporous carbon-supported Cu0.5Ni 0.5 nanocatalysts exhibit excellent catalytic performance for the hydrolysis of ammonia borane and decomposition of hydrous hydrazine with 100% hydrogen selectivity.Abstract:
Efficient bimetallic nanocatalysts based on non-noble metals are highly desired for the development of new energy storage materials. In this work, we report a simple method for the synthesis of highly dispersed CuNi catalysts supported on mesoporous carbon or silica nanospheres using low-cost metal nitrate precursors. The mesoporous carbon-supported Cu0.5Ni0.5 nanocatalysts exhibit excellent catalytic performance for the hydrolysis of ammonia borane and decomposition of hydrous hydrazine with 100% hydrogen selectivity in aqueous alkaline solution at 60 °C. The chemical composition and size of the metal particles, which have a significant influence on the catalytic properties of the supported bimetallic CuNi materials, can readily be controlled by adjusting the metal loading and ratio of metal precursors. An exceedingly high turnover frequency of 3288 (molH2 molmetal–1 h–1) and complete reaction within 1 min in dehydrogenation of ammonia-borane were achieved over a tailored-made catalyst obtained through p...read more
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Journal ArticleDOI
Dehydrogenation of Ammonia Borane by Metal Nanoparticle Catalysts
TL;DR: In this paper, the authors summarize new progress in the development of metal nanoparticle (NP) catalysts, which are categorized into monometallic and heterometallic catalysts with excellent activity and high recyclability for different AB dehydrogenation pathways.
Journal ArticleDOI
High Pt-like activity of the Ni–Mo/graphene catalyst for hydrogen evolution from hydrolysis of ammonia borane
TL;DR: In this paper, Ni nanoparticles modified with a Mo dopant have been synthesized on graphene sheets via a facile chemical reduction route, which show the highest catalytic activity reported to date for noble-metal-free catalysts for hydrogen evolution from the hydrolysis of ammonia borane with a turnover frequency value as high as 66.7 mol H2 (mol metal min)−1.
Journal ArticleDOI
Nanopore-Supported Metal Nanocatalysts for Efficient Hydrogen Generation from Liquid-Phase Chemical Hydrogen Storage Materials
TL;DR: The latest research progress in catalytic hydrogen production is summarized, by using metal nanocatalysts confined within diverse nanoporous materials, such as metal-organic frameworks, porous carbons, zeolites, mesoporous silica, and porous organic polymers.
Journal ArticleDOI
Efficient and versatile CuNi alloy nanocatalysts for the highly selective hydrogenation of furfural
TL;DR: In this article, a series of highly dispersed and versatile bimetallic nanocatalysts derived from layer double hydroxides (LDHs) precursors were fabricated and used for the selective hydrogenation of furfural to tetrahydrofurfuryl alcohol (THFA) and FOL.
Journal ArticleDOI
Supported Rhodium Catalysts for Ammonia–Borane Hydrolysis: Dependence of the Catalytic Activity on the Highest Occupied State of the Single Rhodium Atoms
Liangbing Wang,Hongliang Li,Wenbo Zhang,Xiao Zhao,Jianxiang Qiu,Aowen Li,Xusheng Zheng,Zhenpeng Hu,Rui Si,Jie Zeng +9 more
TL;DR: A quantitative profile for exploring metal-support interactions by considering the highest occupied state in single-atom catalysts, which indicates that the catalytic performance depended directly on thehighest occupied state of the single Rh atoms, which was determined by the band structure of the substrates.
References
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Journal ArticleDOI
Electronic Metal–Support Interactions in Single-Atom Catalysts
Pingping Hu,Zhiwei Huang,Zakariae Amghouz,Michiel Makkee,Fei Xu,Freek Kapteijn,Alla Dikhtiarenko,Yaxin Chen,Xiao Gu,Xingfu Tang +9 more
TL;DR: A stable supported single-atom silver catalyst with a controllable electronic state was obtained by anti-Ostwald ripening and may improve the understanding of the nature of electronic metal-support interactions and lead to structure-activity correlations.
Journal ArticleDOI
Structural study of mesoporous MCM-48 and carbon networks synthesized in the spaces of MCM-48 by electron crystallography
Mizue Kaneda,Toshikazu Tsubakiyama,Anna Carlsson,Yasuhiro Sakamoto,Tetsu Ohsuna,Osamu Terasaki,Sang Hoon Joo,Ryong Ryoo +7 more
TL;DR: In this article, the Fourier sum of the 3D-structure factors, both amplitudes and phases, which are obtained from Fourier analyses of a set of high-resolution electron microscope (HREM) images, was used for structure analyses of two MCM-48 crystals with different crystal morphologies.
Journal ArticleDOI
Noble-Metal-Free Bimetallic Nanoparticle-Catalyzed Selective Hydrogen Generation from Hydrous Hydrazine for Chemical Hydrogen Storage
TL;DR: Noble-metal-free nickel-iron alloy nanoparticles exhibit excellent catalytic performance for the complete decomposition of hydrous hydrazine, for which the NiFe nanocatalyst shows 100% hydrogen selectivity in basic solution.
Journal ArticleDOI
The energetics of supported metal nanoparticles: relationships to sintering rates and catalytic activity.
TL;DR: My laboratory group's research toward the basic understanding of the effects of particle size and support material on catalytic properties is reviewed, with key insights into how and why specific structural properties of catalyst nanomaterials dictate their catalysttic properties.
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