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Controlled contribution of Ni and Cr cations to stainless steel 304 electrode: Effect of electrochemical oxidation on electrocatalytic properties
Electrochemistry Communications ( IF 5.4 ) Pub Date : 2020-06-15 , DOI: 10.1016/j.elecom.2020.106770
Moonsu Kim , Yong-Tae Kim , Jinsub Choi

The surface composition of a stainless steel 304 electrode, composed of Fe, Ni, and Cr, was adjusted through electrochemical oxidation under harsh anodizing conditions. As the electrochemical oxidation progressed, the Ni and Cr atoms in the Fe medium moved via the synergetic effect of electromigration and drag force, creating a Ni-rich surface on the electrodes with fast kinetics for the hydrogen evolution reaction. This study investigated the optimal duration of electrochemical oxidation affecting the cation contribution of Cr, which forms a passivation layer with high charge transfer resistance on the electrode. Electrochemical oxidation for 60 min induced a significant enhancement in the electrochemical catalytic activity as the cation contribution of Cr decreased.



中文翻译:

Ni和Cr阳离子对304不锈钢电极的受控贡献:电化学氧化对电催化性能的影响

由Fe,Ni和Cr组成的304不锈钢电极的表面成分是通过在苛刻的阳极氧化条件下进行电化学氧化来调节的。随着电化学氧化的进行,Fe介质中的Ni和Cr原子通过电迁移和拖曳力的协同作用而移动,从而在电极上形成了富Ni的表面,具有快速的动力学以进行氢气释放反应。这项研究研究了影响Cr阳离子贡献的电化学氧化的最佳持续时间,Cr在电极上形成具有高电荷转移电阻的钝化层。随着Cr的阳离子贡献的减少,电化学氧化60分钟引起电化学催化活性的显着增强。

更新日期:2020-06-23
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