过电位
纳米片
氧化物
催化作用
纳米颗粒
材料科学
氧气
化学工程
热解
析氧
纳米技术
化学
物理化学
电化学
电极
有机化学
冶金
生物化学
工程类
作者
Zhaoshun Liu,Junli Xu,Fang Zhang,Ji Lu,Zhongning Shi
标识
DOI:10.1016/j.ijhydene.2022.12.333
摘要
In this work, high-entropy oxide nanoparticles (HEO NPs)/high-entropy metal-organic framework (HE-MOF) heterostructure electrocatalysts for oxygen evolution reaction (OER) are constructed by in-situ growth of HEO NPs on HE-MOF using partial-localized pyrolysis strategy, and the effect of pyrolysis temperature on the OER performance are studied. The results indicate that the well-dispersed HEO NPs are rich in defects such as oxygen vacancy and lattice distortion, which can increase catalytic active centers. Meanwhile, the nanosheet-like HE-MOF not only acts as the support HEO NPs catalyst but also is kinetically beneficial for fast electrons and ions transportation. Among all the prepared nanostructures, HE-MOF-350-200 shows the best OER performance, achieving a low overpotential of 266 mV at 50 mA cm−2 along with a satisfactory stability.
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