过电位
催化作用
贵金属
氢氧化物
钴
电化学
材料科学
纳米颗粒
析氧
分解水
化学工程
层状双氢氧化物
氢氧化钴
无机化学
纳米技术
化学
电极
物理化学
光催化
冶金
有机化学
工程类
作者
Qian Chen,Peisheng Cao,Yanying Wang,Jinying Yuan,Peng Wu
出处
期刊:Small
[Wiley]
日期:2024-01-08
标识
DOI:10.1002/smll.202310380
摘要
Abstract Supported noble metal nanoparticles (NMNPs) are appealing for energy and environment catalysis. To facilitate the loading of NMNPs, in situ reduction of M n+ on the support with extra reductants/surfactants is adopted, but typically results in aggregated NMNPs with uneven size distributions or blocked active sites of the NMNPs. Herein, the use of cobalt layered double hydroxide (Co‐LDH) is proposed as both support and reductant for the preparation of supported NMNPs with ultrasmall sizes and even distributions. The resultant Co‐LDH‐supported NMNPs exhibit excellent catalytic performance and stability. For example, Ir/Co‐LDH displays a low overpotential of 188 mV (10 mA cm −2 ) for electrocatalytic oxygen evolution reaction and a long‐term stability over 100 h (100 mA cm −2 ) in overall water splitting. Ru/Co‐LDH can achieve a 4‐nitrophenol reduction with high rate of 0.36 min −1 and S 2− detection with low limit of detection (LOD) of 0.34 µ m . Overall, this work provides a green and effective strategy to fabricate supported NMNPs with greatly improved catalytic performances.
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