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.

中文翻译：

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光促进快速重建诱导Ag@非晶态NiFe氢氧化物活性位点的改变以增强析氧反应

局部结构中的动态表面自重构行为与析氧反应（OER）性能相关，这已成为构建催化活性相的有效策略。然而，了解重建机制并快速、深入地完成重建仍然是一个挑战。在这里，我们报道了碳布上负载银纳米粒子的非晶态镍铁氢氧化物纳米片的光促进快速重建（PRR）过程，以增强 OER。 Ag 产生的光生空穴与阳极电位相结合，有助于非晶基底的彻底重建。作为活性位点的不饱和配位Fe原子的价态显着增加，而相应的晶体基质几乎没有变化。重构过程中非晶态和晶态基质的不同结构演化导致 OER 的不同途径。这种利用负载贵金属纳米粒子的PRR可以加速基底中活性物质的生成并提高电导率，这为通过重构策略开发高效催化剂提供了新的灵感。