面(心理学)
析氧
阳极
材料科学
纳米孔
阴极
分解水
电解水
过电位
电解
化学工程
电流密度
镍
箔法
纳米技术
冶金
电极
电化学
复合材料
化学
电解质
物理化学
心理学
五大性格特征
光催化
人格
催化作用
生物化学
工程类
物理
量子力学
社会心理学
作者
Jing Dong,Fu Qiang Zhang,Yang Yang,Yue‐Biao Zhang,Hailong He,Xiaofeng Huang,Xiujun Fan,Xian-Ming Zhang
标识
DOI:10.1016/j.apcatb.2018.11.003
摘要
Developing earth-abundant catalysts for overall water splitting is important to sustainable energy conversion technologies. However, selectively exposing active surface and judiciously optimizing nanostructure remain challenging for high-performance electrocatalysts. Herein, (003)-facet-exposed Ni3S2 nanoporous thin films (NTFs) on nickel foil are synthesized through anodization and vapor-sulfurization strategies. The Ni3S2 NTFs exhibit low onset overpotentials of 48 and 152 mV, and require overpotentials of 135 and 175 mV to achieve a benchmark of 10 mA cm–2 towards alkaline hydrogen and oxygen evolution, respectively. Remarkably, an electrolyzer assembled by Ni3S2 NTFs as both anode and cathode can deliver a water-splitting current density of 10 mA cm–2 at 1.611 V. Experimental and theoretical results indicate that the controllable hollow nanoporous spheres and low-coordinated Ni3-triangles on Ni3S2(003) facet synergistically contribute to the electrocatalytic activity.
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