Volume 56, Issue 17 pp. 4712-4718
Communication

Supported Rhodium Catalysts for Ammonia–Borane Hydrolysis: Dependence of the Catalytic Activity on the Highest Occupied State of the Single Rhodium Atoms

Liangbing Wang

Liangbing Wang

Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026 P.R. China

These authors contributed equally to this work.

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Hongliang Li

Hongliang Li

Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026 P.R. China

These authors contributed equally to this work.

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Wenbo Zhang

Wenbo Zhang

Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026 P.R. China

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Xiao Zhao

Xiao Zhao

Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026 P.R. China

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Jianxiang Qiu

Jianxiang Qiu

Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026 P.R. China

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Aowen Li

Aowen Li

Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026 P.R. China

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Xusheng Zheng

Xusheng Zheng

Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026 P.R. China

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Prof. Zhenpeng Hu

Corresponding Author

Prof. Zhenpeng Hu

School of Physics, Nankai University, Tianjin, 300071 P.R. China

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Prof. Rui Si

Corresponding Author

Prof. Rui Si

Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204 P.R. China

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Prof. Jie Zeng

Corresponding Author

Prof. Jie Zeng

Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026 P.R. China

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First published: 30 March 2017
Citations: 193

Graphical Abstract

Phase-dependent: When a catalyst consisting of isolated rhodium atoms dispersed on the surface of VO2 nanorods was employed for ammonia–borane hydrolysis, the activation energy changed when the substrate underwent a phase transition. Mechanistic studies indicate that the catalytic performance depends directly on the highest occupied state of the single Rh atoms, which is determined by the band structure of the substrate.

Abstract

Supported metal nanocrystals have exhibited remarkable catalytic performance in hydrogen generation reactions, which is influenced and even determined by their supports. Accordingly, it is of fundamental importance to determine the direct relationship between catalytic performance and metal–support interactions. Herein, we provide a quantitative profile for exploring metal–support interactions by considering the highest occupied state in single-atom catalysts. The catalyst studied consisted of isolated Rh atoms dispersed on the surface of VO2 nanorods. It was observed that the activation energy of ammonia–borane hydrolysis changed when the substrate underwent a phase transition. Mechanistic studies indicate that the catalytic performance depended directly on the highest occupied state of the single Rh atoms, which was determined by the band structure of the substrates. Other metal catalysts, even with non-noble metals, that exhibited significant catalytic activity towards NH3BH3 hydrolysis were rationally designed by adjusting their highest occupied states.

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