Volume 60, Issue 52 pp. 27095-27101
Research Article

Water Splitting by C60-Supported Vanadium Single Atoms

Gao-Lei Hou

Corresponding Author

Gao-Lei Hou

Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium

MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an, 710049 P. R. China

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Tao Yang

Corresponding Author

Tao Yang

MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an, 710049 P. R. China

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Mengyang Li

Mengyang Li

MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an, 710049 P. R. China

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Jan Vanbuel

Jan Vanbuel

Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium

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Olga V. Lushchikova

Olga V. Lushchikova

Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, The Netherlands

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Piero Ferrari

Piero Ferrari

Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium

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Joost M. Bakker

Joost M. Bakker

Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, The Netherlands

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Ewald Janssens

Corresponding Author

Ewald Janssens

Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium

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First published: 05 October 2021
Citations: 49

Graphical Abstract

Splitting of water by a single vanadium is greatly facilitated by a C60 support, which can be regarded as a small piece of porous carbon nanomaterials, especially those with intrinsic pentagonal defects and curvatures. The compelling experimental and theoretical evidence demonstrates the important role of support in single vanadium atom catalysis.

Abstract

Water splitting is an important source of hydrogen, a promising future carrier for clean and renewable energy. A detailed understanding of the mechanisms of water splitting, catalyzed by supported metal atoms or nanoparticles, is essential to improve the design of efficient catalysts. Here, we report an infrared spectroscopic study of such a water splitting process, assisted by a C60 supported vanadium atom, C60V++H2O→C60VO++H2. We probe both the entrance channel complex C60V+(H2O) and the end product C60VO+, and observe the formation of H2 as a result from resonant infrared absorption. Density functional theory calculations exploring the detailed reaction pathway reveal that a quintet-to-triplet spin crossing facilitates the water splitting reaction by C60-supported V+, whereas this reaction is kinetically hindered on the isolated V+ ion by a high energy barrier. The C60 support has an important role in lowering the reaction barrier with more than 70 kJ mol−1 due to a large orbital overlap of one water hydrogen atom with one carbon atom of the C60 support. This fundamental insight in the water splitting reaction by a C60-supported single vanadium atom showcases the importance of supports in single atom catalysts by modifying the reaction potential energy surface.

Conflict of interest

The authors declare no conflict of interest.

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