电化学
电催化剂
材料科学
拉曼光谱
化学工程
插层(化学)
电解质
蚀刻(微加工)
电极
催化作用
阳极
电泳沉积
碳纤维
纳米技术
无机化学
化学
复合数
复合材料
有机化学
涂层
物理化学
工程类
物理
图层(电子)
光学
作者
Minhao Sheng,Xiaoqing Bin,Yawei Yang,Zhong Chen,Wenxiu Que
标识
DOI:10.1002/admt.202301694
摘要
Abstract The work presents a green and fluorine‐free environmentally friendly two‐electrode system, which enables the direct fabrication of the corresponding 3D MXene electrodes by the synergistic combination of anodic electrochemical in situ Al etching from Mo 2 TiAlC 2 MAX and cathodic electrophoretic deposition. In just several minutes, the Mo 2 TiC 2 MXene can be deposited on the cathode plate (Pt foil or carbon cloth) without the need for organic large‐molecule intercalation agents or ultrasound treatment. This approach allows an efficient separation of MXene from the electrolyte, leading to a significant reduction in the quantity of waste acid generated by conventional acid etching processes. The electrochemically etched‐MXene can be uniformly and stably deposited onto carbon cloth (E‐MXene@CC), enabling its direct utilization as a 3D electrocatalyst for hydrogen evolution reaction (HER). This unique 3D E‐MXene@CC exhibits a moderate HER performance and outperforms most of the reported pure non‐precious MXene‐based catalysts in 0.5 m H 2 SO 4 . In order to clarify the catalytic mechanism, in situ Raman spectroscopy of 3D E‐MXene@CC reveals a significant down‐shift without observing any new bands when the HER potential shifts negatively, which can be attributed to H + intercalation.
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