镧系多孔纳米晶高熵氧化物电催化剂OER性能研究

IF 2.6 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

CrystEngComm Pub Date : 2025-03-12 DOI:10.1039/D4CE01301H

Baolin Yi, Junhua You, Yao Zhao, Guangyi Liu and Jie Zhang

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引用次数: 0

摘要

研究了退火温度和退火时间对析氧反应镧系电催化剂性能的影响。结果表明，具有多层孔隙结构的HEO颗粒具有更多的缺陷，可以增强催化剂的活性中心。同时，自然混沌相可以产生许多“悬空键”，这些“悬空键”提供了许多具有不饱和电结构的活性位点。在所制备的纳米结构中，HEO-250AR-3H表现出最好的OER性能，在50 mA cm−2下达到320 mV的低过电位，并保持稳定电位超过72 h。

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Study of OER performance of lanthanide porous nanocrystalline high-entropy oxide electrocatalysts

This work examined the effects of annealing temperature and time on the performance of lanthanide electrocatalysts for the oxygen evolution reaction. Results indicate that HEO particles with multilayer pore structures have more flaws, which can enhance the catalyst's active centre. Meanwhile, the naturally chaotic phase can produce many “dangling bonds”, which offer numerous active sites with unsaturated electrical structures. Among the prepared nanostructures, HEO-250AR-3H exhibited the best OER performance, reaching a low overpotential of 320 mV at 50 mA cm⁻² and maintained a stable potential for over 72 h.

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