学術雑誌論文

学術雑誌論文

Nature Communications. 2024, 15(1), p. 6403

Heteroatom doping enables hydrogen spillover via H⁺/e⁻ diffusion pathways on a non-reducible metal oxide

Nature Research

英語

2024-07-31

https://doi.org/10.1038/S41467-024-50217-Z

Shun K., Mori K., Kidawara T., et al. Heteroatom doping enables hydrogen spillover via H⁺/e⁻ diffusion pathways on a non-reducible metal oxide. Nature Communications 15, 6403 (2024); https://doi.org/10.1038/S41467-024-50217-Z.

Hydrogen spillover, the simultaneous diffusion of protons (H⁺) and electrons (e⁻) is considered to be applicable to ubiquitous technologies related to hydrogen but limited to over reducible metal oxides. The present work demonstrates that a non-reducible MgO with heteroatom Al dopants (Al–MgO) allows hydrogen spillover in the same way as reducible metal oxides. Furthermore, a H⁺ storage capacity of this material owing to hydrogen spillover is more than three times greater than those of various standard metal oxides based on H⁺ transport channels within its bulk region. Atomic hydrogen diffuses over the non-reducible Al–MgO produces active H⁺-e⁻ pairs, as also occurs on reducible metal oxides, to enhance the catalytic performance of Ni during CO2 hydrogenation. The H⁺ and e⁻ diffusion pathways generated by the heteroatom Al doping are disentangled based on systematic characterizations and calculations. This work provides a new strategy for designing functional materials intended to hydrogen spillover for diverse applications in a future hydrogen-based society.

This article is licensed under a Creative Commons Attribution 4.0 International License.

97846

Heteroatom doping enables hydrogen spillover via H⁺/e⁻ diffusion pathways on a non-reducible metal oxide

Nature Research

英語

2024-07-31

Nature Communications

15

1

6403

https://doi.org/10.1038/S41467-024-50217-Z

https://hdl.handle.net/11094/97846