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Ultrafine CoPS nanoparticles encapsulated in N, P, S tri-doped porous carbon as an efficient bifunctional water splitting electrocatalyst in both acid and alkaline solution

Abstract

Searching for highly efficient, stable and non-noble metal electrocatalysts for the hydrogen/oxygen evolution reaction (HER/OER) is crucial to renewable-energy conversion systems. Cobalt phosphosulfide (CoPS) is regarded as a promising electrocatalyst for HER in acid solution. Nonetheless, there are no studies of its HER and OER activity in basic solution. Herein, we engineer a novel and highly efficient water splitting electrocatalyst of ultrafine CoPS nanoparticles (NPs) encapsulated in N, P, S tri-doped porous carbon (CoPS@NPS-C) through metal−organic framework (MOF) and commercial carbon black (XC-72) as precursors. The wealthy and evenly distributed metals of MOF form the ultrafine CoPS NPs, and the rich N organic ligands of MOF and XC-72 are shaped into the NPS-C to protect CoPS NPs leading to long-term stability in water-splitting applications. Meanwhile, the strong interaction between CoPS and NPS-C in this special structure not only ensures the high activity of HER in acid solution and OER in alkaline solution, but also keeps well HER performance in alkaline. The results display that the novel structure electrocatalyst of CoPS@NPS-C has a great potential in water-splitting applications.

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Publication details

The article was received on 07 Feb 2018, accepted on 20 Apr 2018 and first published on 03 May 2018


Article type: Paper
DOI: 10.1039/C8TA01310A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Ultrafine CoPS nanoparticles encapsulated in N, P, S tri-doped porous carbon as an efficient bifunctional water splitting electrocatalyst in both acid and alkaline solution

    J. Ma, Y. Hu, F. Li, Y. Long, H. Yang, L. Gao, X. Long, H. Hu, N. Xu and J. Jin, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA01310A

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