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Bifunctional metal phosphide FeMnP films from single source metal organic chemical vapor deposition for efficient overall water splitting

zhpd55 添加于 2017/7/28 15:04:17  765次阅读 | 0次推荐 | 0个评论

Developing stable and efficient bifunctional catalysts for overall water splitting into hydrogen and oxygen is a critical step in the realization of several clean-energy technologies. Here we report a robust and highly active electrocatalyst that is constructed by deposition of the ternary metal phosphide FeMnP onto graphene-protected nickel foam by metal-organic chemical vapor deposition from a single source precursor. FeMnP exhibits high electrocatalytic activity toward both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Utilizing FeMnP/GNF as both the anode and the cathode for overall water splitting, a current density of 10 mA cm−2 is achieved at a cell voltage of as low as 1.55 V with excellent stability. Complementary density functional theory (DFT) calculations suggest that facets exposing both Fe and Mn sites are necessary to achieve high HER activity. The present work provides a facile strategy for fabricating highly efficient electrocatalysts from earth-abundant materials for overall water splitting.

作 者:Zhenhuan Zhao, Desmond E. Schipper, Andrew P. Leitner, Hari Thirumalai, Jing-Han Chen, Lixin Xie, Fan Qin, Md Kamrul Alam, Lars C. Grabow, Shuo Chen, Dezhi Wang, Zhifeng Ren, Zhiming Wang, Kenton H. Whitmire, Jiming Bao
期刊名称: Nano Energy
期卷页: 20 July 2017 第39卷 第期 444–453页
学科领域:化学科学 » 无机化学 » 无机合成和制备化学
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原文链接:https://doi.org/10.1016/j.nanoen.2017.07.027
DOI: 10.1016/j.nanoen.2017.07.027
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备 注: Highlights • FeMnP was grown on Ni foam or graphene-wrapped Ni foam by MOCVD. • Films were grown using the single-source molecular precursor FeMn(CO)8(μ-PH(μ-PH2). • The films are an efficient bifunctional electrocatalyst for water splitting. • FeMnP/graphene/Ni foam achieved a current density of 10 mA cm−2 at 1.55 V for overall water splitting. • DFT investigation supports the outstanding electrocatalytic activity of FeMnP.
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