Photo‐promoted rapid reconstruction induced alterations in active site of Ag@amorphous NiFe hydroxides for enhanced oxygen evolution reaction
Zhi Cai,
Mingyuan Xu,
Yanhong Li,
Xinyan Zhou,
Kexin Yin,
Lidong Li,
Binbin Jia,
Lin Guo,
Hewei Zhao
Affiliations
Zhi Cai
School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing China
Mingyuan Xu
School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing China
Yanhong Li
School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing China
Xinyan Zhou
School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing China
Kexin Yin
School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing China
Lidong Li
School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing China
Binbin Jia
Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, College of Materials and Chemical Engineering China Three Gorges University Yichang Hubei China
Lin Guo
School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing China
Hewei Zhao
School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing China
Abstract The dynamic surface self‐reconstruction behavior in local structure correlates with oxygen evolution reaction (OER) performance, which has become an effective strategy for constructing the catalytic active phase. However, it remains a challenge to understand the mechanisms of reconstruction and to accomplish it fast and deeply. Here, we reported a photo‐promoted rapid reconstruction (PRR) process on Ag nanoparticle‐loaded amorphous Ni‐Fe hydroxide nanosheets on carbon cloth for enhanced OER. The photogenerated holes generated by Ag in conjunction with the anodic potential contributed to a thorough reconstruction of the amorphous substrate. The valence state of unsaturated coordinated Fe atoms, which serve as active sites, is significantly increased, while the corresponding crystalline substrate shows little change. The different structural evolutions of amorphous and crystalline substrates during reconstruction lead to diverse pathways of OER. This PRR utilizing loaded noble metal nanoparticles can accelerate the generation of active species in the substrate and increase the electrical conductivity, which provides a new inspiration to develop efficient catalysts via reconstruction strategies.
