析氧
X射线光电子能谱
过电位
材料科学
化学工程
共晶体系
深共晶溶剂
扫描电子显微镜
电化学
化学
物理化学
电极
微观结构
冶金
复合材料
工程类
作者
Shengqin Guan,Baoen Xu,Juncheng Wu,Jie Han,Taotao Guan,Yucheng Yang,Kaixi Li,Jianlong Wang
出处
期刊:Fuel
[Elsevier]
日期:2024-02-01
卷期号:358: 130315-130315
被引量:1
标识
DOI:10.1016/j.fuel.2023.130315
摘要
High-entropy materials (HEM) are promising electrocatalysts for oxygen evolution reaction (OER) because of their instinctive physicochemical properties and highly tailorable electrochemical properties. However, their synthesis and morphology control remains challenging due to the thermodynamic immiscibility of multimetallic elements under mild conditions. Deep eutectic solvents (DESs) as solvents and temples can affect the morphology and electrochemical performance of OER. Herein, a series of HEM electrocatalysts based on different DESs were synthesized to investigate the effect of DES on the morphology and OER performance of catalysts. The influence of metals on OER performance was further explored. Among them, poly-(ethylene glycol)/thiourea-based HEM catalyst (PEG/TU-NiFeCoMnAl) shows excellent OER performance with an overpotential of only 220 mV and 317 mV at10 mA cm−2 and 100 mA cm−2, respectively. Finally, the influence of different metal active sites on OER performance was analyzed by DFT calculations, and scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, inductively coupled plasma-optical emission spectroscopy (ICP-OES) X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopes (TEM) characterization testing technologies. This work provides a new direction for the construction of advanced high-entropy materials under mild conditions for energy conversion and storage.
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