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MOFs-derived Mn doped porous CoP nanosheets as efficient and stable bifunctional electrocatalysts for water splitting

Abstract

Searching for the highly active and stable bifunctional electrocatalysts for overall water splitting, e.g., for both of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), is dominating in terms of operating future renewable energy storage and conversion processes to reality. In this work, a kind of two-dimensional ultrathin manganese (Mn) doped polyhedral cobalt phosphide (Mn-CoP) have been synthesized with the etching-carbonization-phosphidation of Co-centered metal-organic frameworks. The as-prepared porous Mn-CoP nanosheets have larger specific surface area and higher porosity furnishing more plentiful catalytic active sites than its counterpart hollow CoP and Mn-CoP nanoparticles, thus show much better electrocatalytic activity for both HER and OER in acidic and alkaline media. In addition, the Mn-CoP nanosheets also demonstrate excellent durability after long-term operations. The high performances are attributed to the synergistic effects of CoP nanosheets with intrinsic activity, graphitic carbon and controllable electronic structure doped by Mn and N elements. This synthetic methodology of using a classical MOF as a precursor to build a new 2D sheet-like composite may create the opportunities to search highly efficient and robust non-precious metal catalysts for energy-related reactions.

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Supplementary files

Publication details

The article was received on 03 Jul 2018, accepted on 13 Sep 2018 and first published on 15 Sep 2018


Article type: Paper
DOI: 10.1039/C8DT02706D
Citation: Dalton Trans., 2018, Accepted Manuscript
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    MOFs-derived Mn doped porous CoP nanosheets as efficient and stable bifunctional electrocatalysts for water splitting

    Y. Li, B. Jia, Q. Liu, M. Cai, Z. Xue, Y. Fan, H. Wang, C. Su and G. Li, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT02706D

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