过电位
塔菲尔方程
析氧
纳米点
材料科学
纳米技术
电极
化学
物理化学
电化学
作者
Ziqian Xue,Xia Li,Qinglin Liu,Mengke Cai,Kang Liu,Min Liu,Zhuofeng Ke,Xialin Liu,Guangqin Li
标识
DOI:10.1002/adma.201900430
摘要
Interface engineering has been recognized as one of the most promising strategies for regulating the physical and chemical properties of materials. However, constructing well-defined nanointerfaces with efficient oxygen evolution reaction (OER) still remains a challenge. Herein, cross columnar NiTe nanoarrays supported on nickel foam are prepared. Subsequently, NiTe/NiS nanointerfaces are constructed by an ion-exchange process. Importantly, the electrocatalytic performance for the OER can be facilitated by coupling NiTe and NiS. As a result, NiTe/NiS shows excellent OER activity with an ultralow overpotential of only 257 mV at a current density of 100 mA cm-2 , and a Tafel slope of 49 mV dec-1 in 1.0 m KOH. The calculated and experimental results reveal that the strong electron interaction on nanointerfaces induces electronic structure modulation, which optimizes the binding energy of *OOH intermediates, thus improving the OER performance.
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