光促进快速重构诱导 Ag@amorphous NiFe 氢氧化物活性位点的改变,以增强氧进化反应

IF 19.5 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Carbon Energy Pub Date : 2024-04-02 DOI:10.1002/cey2.543
Zhi Cai, Mingyuan Xu, Yanhong Li, Xinyan Zhou, Kexin Yin, Lidong Li, Binbin Jia, Lin Guo, Hewei Zhao
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引用次数: 0

摘要

局部结构的动态表面自重构行为与氧进化反应(OER)性能相关,已成为构建催化活性相的有效策略。然而,如何理解重构机制并快速、深入地完成重构仍是一项挑战。在此,我们报道了在碳布上的银纳米粒子负载非晶氢氧化镍铁纳米片上的光促进快速重构(PRR)过程,以增强 OER。银产生的光生空穴与阳极电位共同促进了非晶基底的彻底重构。作为活性位点的不饱和配位铁原子的价态显著增加,而相应的晶体基底则变化不大。非晶基底和晶体基底在重构过程中的不同结构演变导致了 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种的生成并提高导电性,这为通过重构策略开发高效催化剂提供了新的灵感。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Photo-promoted rapid reconstruction induced alterations in active site of Ag@amorphous NiFe hydroxides for enhanced oxygen evolution reaction

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.

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来源期刊
Carbon Energy
Carbon Energy Multiple-
CiteScore
25.70
自引率
10.70%
发文量
116
审稿时长
4 weeks
期刊介绍: Carbon Energy is an international journal that focuses on cutting-edge energy technology involving carbon utilization and carbon emission control. It provides a platform for researchers to communicate their findings and critical opinions and aims to bring together the communities of advanced material and energy. The journal covers a broad range of energy technologies, including energy storage, photocatalysis, electrocatalysis, photoelectrocatalysis, and thermocatalysis. It covers all forms of energy, from conventional electric and thermal energy to those that catalyze chemical and biological transformations. Additionally, Carbon Energy promotes new technologies for controlling carbon emissions and the green production of carbon materials. The journal welcomes innovative interdisciplinary research with wide impact. It is indexed in various databases, including Advanced Technologies & Aerospace Collection/Database, Biological Science Collection/Database, CAS, DOAJ, Environmental Science Collection/Database, Web of Science and Technology Collection.
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Issue Information Cover Image, Volume 6, Number 10, October 2024 Back Cover Image, Volume 6, Number 10, October 2024 Interface and doping engineering of V2C-MXene-based electrocatalysts for enhanced electrocatalysis of overall water splitting Issue Information
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