标题:Single-crystalline (FexNi1-x)2P nanosheets with dominant {011¯1¯} facets: Efficient electrocatalysts for hydrogen evolution reaction at all pH values
作者:Zhang, Wei ;Zou, Yihui ;Liu, Hongli ;Chen, Shuai ;Wang, Xin ;Zhang, Huawei ;She, Xilin ;Yang, Dongjiang
作者机构:[Zhang, Wei ;Zou, Yihui ;Liu, Hongli ;She, Xilin ;Yang, Dongjiang ] State Key Laboratory of Bio-Fibers and Eco-Textiles, Shandong Collaborative Innova 更多
通讯作者:She, Xilin
来源:Nano Energy
出版年:2019
卷:56
页码:813-822
DOI:10.1016/j.nanoen.2018.11.090
摘要:Electrocatalytic hydrogen evolution reaction (HER) plays a critical role in developing hydrogen and fuel cell technologies. At present, only platinum (Pt) and its compounds are thought to be efficient electrocatalysts for HER, particularly at all-pH values. However, the scarcity and high cost of Pt-based catalysts have seriously hindered their practical application in HER. Here, we report a two-step method for synthesizing single-crystalline (FexNi1-x)2P nanosheets with exposed {011¯1¯} facets on Ni foam. Compared with pristine Ni2P, the (FexNi1-x)2P nanosheets exhibit a dramatically improved HER activity (an overpotential of 81, 90, 103 mV at 10 mA cm−2 in acidic, neutral and alkaline media, respectively). Based on the density functional theory (DFT) calculations, it is observed that trace Fe-doping can lead to more charge accumulation around P active sites, which accordingly decreases the ΔGH* and ΔGH2O and promotes the catalytic activity.
© 2018 Elsevier Ltd
收录类别:EI
资源类型:期刊论文
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