Jump to main content
Jump to site search


Accelerating the water splitting kinetics of CoP microcubes anchored on a graphene electrocatalyst by Mn incorporation

Author affiliations

Abstract

CoP is considered as an efficient electrocatalyst for the hydrogen evolution reaction (HER) in acidic electrolytes but its performance in alkaline solutions is generally poor because of its slow reaction kinetics, which further limits its application in overall water splitting. Herein, we demonstrate a strategy to greatly accelerate its HER and OER kinetics in alkaline solutions through Mn incorporation. Ternary MnxCo1−xP microcubes with a tunable Mn/Co ratio strongly anchored on rGO were synthesized using Prussian blue analogues as precursors. The synergy between the high activity of MnxCo1−xP microcubes and the good conductivity of rGO leads to the superior performance of the hybrid toward water splitting in 1 M KOH. The optimized Mn0.6Co0.4P–rGO electrocatalyst shows high activity and stability towards both the HER and OER with low overpotentials of 54 and 250 mV at 10 mA cm−2, respectively. Furthermore, the water electrolyzer using Mn0.6Co0.4P–rGO as both the cathode and anode only requires a cell voltage as low as 1.55 V to reach a current density of 10 mA cm−2, making Mn0.6Co0.4P–rGO a competitive and cost-effective electrocatalyst for water splitting.

Graphical abstract: Accelerating the water splitting kinetics of CoP microcubes anchored on a graphene electrocatalyst by Mn incorporation

Back to tab navigation

Supplementary files

Publication details

The article was received on 01 Oct 2018, accepted on 19 Nov 2018 and first published on 21 Nov 2018


Article type: Paper
DOI: 10.1039/C8NA00261D
Citation: Nanoscale Adv., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    Accelerating the water splitting kinetics of CoP microcubes anchored on a graphene electrocatalyst by Mn incorporation

    X. Xu, H. Liang, G. Tang, Y. Hong, Y. Xie, Z. Qi, B. Xu and Z. Wang, Nanoscale Adv., 2019, Advance Article , DOI: 10.1039/C8NA00261D

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements