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题名: Metal organic framework-derived CoPS/N-doped carbon for efficient electrocatalytic hydrogen evolution
作者: Li, YZ;  Niu, SQ;  Rakov, D;  Wang, Y;  Caban-Acevedo, M;  Zheng, SJ;  Song, B;  Xu, P
发表日期: 2018-4-21
摘要: Electrocatalytic hydrogen evolution has attracted a great deal of attention due to the urgent need for clean energy. Herein, we demonstrate the synthesis of ternary pyrite-type cobalt phosphosulphide (CoPS) nanoparticles supported on a nitrogen-doped carbon matrix, CoPS/N-C, through carbonization and subsequent phosphosulfurization of Co-based zeolitic imidazolate frameworks (ZIF-67), as promising hydrogen evolution reaction (HER) electrocatalysts in both acidic and alkaline solutions. The polyhedral structure of ZIF-67 can be well maintained in the as-prepared CoPS/N-C nanocomposites. In particular, CoPS/N-C provides a geometric catalytic current density of -10 mA cm(-2) at overpotentials of -80 and -148 mV vs. a reversible hydrogen electrode (RHE) and a Tafel slope of 68 and 78 mV dec(-1) in 0.5 M H2SO4 and 1 M KOH, respectively, which is superior to most of the transition metal phosphosulfide materials. This MOF-derived synthesis of a transition metal phosphosulfide supported heteroatom-doped carbon matrix provides a promising opportunity for the development of highly efficient electrocatalysts for renewable energy devices.
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Recommended Citation:
Li, YZ,Niu, SQ,Rakov, D,et al. Metal Organic Framework-derived Cops/n-doped Carbon For Efficient Electrocatalytic Hydrogen Evolution[J]. Nanoscale,2018,10(15):7291-7297.

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