Oxidized Mild Steel S235: An Efficient Anode for Electrocatalytically Initiated Water Splitting.
Oxidized Mild Steel S235: An Efficient Anode for Electrocatalytically Initiated Water Splitting.
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DOI：
10.1002/cssc.201500666
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发表时间：
2015-09
期刊：
影响因子：
8.4
通讯作者：
H. Schäfer;K. Küpper;J. Wollschläger;N. Kashaev;J. Hardege;L. Walder;Seyyed Mohsen Beladi-Mousavi;B. Hartmann-Azanza;M. Steinhart;S. Sadaf;F. Dorn
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文献类型：
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作者：
H. Schäfer;K. Küpper;J. Wollschläger;N. Kashaev;J. Hardege;L. Walder;Seyyed Mohsen Beladi-Mousavi;B. Hartmann-Azanza;M. Steinhart;S. Sadaf;F. Dorn
用Cl 2气体氧化S235钢的表面，并检查其在水溶液中关于氧形成的电催化效率。如果暴露于潮湿的Cl 2气体110分钟，钢S235成为一个电催化剂，表现出的析氧反应（OER）的过电位为462 mV，在1 mA cm（-2），pH值为7。与最近开发的OER电催化剂相比，相同样品在pH 13下的OER活性是中等的（在2.0 mA cm（-2）电流密度下的347 mV过电位）。在恒定电流下测量的电势与时间的曲线图证明了所有样品在pH 7和13的催化条件下数十小时的足够稳定性。高分辨率X射线光电子能谱可以合理地解决的条件下，Fe 2 O3，FeO（OH），MnO（OH），和Mn 2 O3是氧化钢S235表面上的主要Fe和Mn物种。
The surface of steel S235 was oxidized by Cl2 gas and checked for its electrocatalytic efficiency regarding oxygen formation in aqueous solution. If exposed to humid Cl2 gas for 110 min, steel S235 became an electrocatalyst that exhibits an overpotential for the oxygen evolution reaction (OER) of 462 mV at 1 mA cm(-2) at pH 7. The OER activity of the same sample at pH 13 was moderate (347 mV overpotential at 2.0 mA cm(-2) current density) in comparison with OER electrocatalysts developed recently. Potential versus time plots measured at a constant current demonstrate the sufficient stability of all samples under catalysis conditions at pH 7 and 13 for tens of hours. High-resolution X-ray photoelectron spectra could be reasonably resolved with the proviso that Fe2 O3 , FeO(OH), MnO(OH), and Mn2 O3 are the predominant Fe and Mn species on the surface of the oxidized steel S235.