过电位
塔菲尔方程
电催化剂
铜
特里斯
氧化物
催化作用
无机化学
化学
电流密度
材料科学
化学工程
电化学
电极
物理化学
有机化学
工程类
物理
量子力学
生物化学
作者
Hu Chen,Yan Gao,Zichen Lu,Yonglai Lu,Licheng Sun
标识
DOI:10.1016/j.electacta.2017.01.187
摘要
Water splitting is deemed as an effective pathway for producing ideal clean energy, such as hydrogen. Here, a copper oxide film (Cu-Tris film) was prepared in-situ from a 0.2 M phosphate buffer solution (pH = 12.0) containing 1.0 mM Cu2+ and 2.0 mM Tris via controlled-potential electrodeposition. The Cu-Tris film showed a significantly low overpotential of 390 mV at a current density of 1.0 mA/cm2 for electrocatalytic water oxidation. Simultaneously, a considerably low Tafel slope of 41 mV/decade was achieved. This Cu-Tris film also exhibited a high and stable current density of ca. 7.5 mA/cm2 at 1.15 V vs. NHE for long-term electrocatalysis (10 h). These results demonstrated the superior performance of the developed Cu-Tris film, which should be attributed to the regulating effect of the five coordinated planar structure of the Cu-Tris complex precursor during the process of electrodeposition.
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