Mechanism of S-atom synergistic ordered oxygen vacancies promoting HER and OER reaction. (IMAGE)

Tsinghua University Press

Mechanism of S-atom synergistic ordered oxygen vacancies promoting HER and OER reaction.

Caption

In HNBs-VO(LRO)-S, the pristine surface-trapped state oxygen vacancies trap sulfur atoms for Fe–S coordination, which both stabilizes the ordered oxygen vacancy structure of HNBs-VO(LRO)-S and also the S atoms can serve as the active site Ⅰ. In addition, the retained ordered oxygen vacancy structure can serve as a channel for the directional transport of charge and as active site II. Therefore, the introduction of an appropriate amount of sulfur atoms in HNBs-VO(LRO)-S can effectively regulate the electronic structure of the catalyst and synergistically promote the HER/OER catalytic reaction on the surface of HNBs-VO(LRO)-S efficiently with the ordered oxygen vacancies.

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Journal of Advanced Ceramics, Tsinghua University Press

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