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CoMoO

Jiabing Luo1, Yan Zhou1, Xingzhao Wang2

  • 1School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.

Journal of Colloid and Interface Science
|June 9, 2023
PubMed
Summary
This summary is machine-generated.

A novel CoMoO4-CoP heterostructure on N-doped carbon (CoMoO4-CoP/NC) shows excellent performance for water splitting. This catalyst efficiently produces hydrogen and oxygen, demonstrating potential for cost-effective hydrogen production.

Keywords:
HeterointerfaceInterfacial electron transferOverall water splittingSpinelTransition metal phosphide

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Efficient electrocatalysts are crucial for water splitting.
  • Developing stable and active catalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is essential for renewable energy technologies.

Purpose of the Study:

  • To synthesize and characterize a novel CoMoO4-CoP heterostructure anchored on a hollow polyhedral N-doped carbon skeleton (CoMoO4-CoP/NC).
  • To evaluate the electrocatalytic performance of CoMoO4-CoP/NC for overall water splitting (OWS) applications.

Main Methods:

  • Anion exchange, self-hydrolysis, and phosphating annealing were used for synthesis.
  • Electrocatalytic activity was tested in 1.0 M KOH solution for HER and OER.
  • Performance was assessed in a two-electrode system for OWS and a home-made membrane electrode device.

Main Results:

  • CoMoO4-CoP/NC exhibited low overpotentials for HER (122 mV) and OER (280 mV) at 10 mA cm⁻².
  • The catalyst achieved an OWS cell voltage of 1.62 V at 10 mA cm⁻².
  • The material showed comparable activity to commercial Pt/C‖RuO2 catalysts in a proton exchange membrane electrolyzer.

Conclusions:

  • The hollow structure and interfacial electron transfer in CoMoO4-CoP/NC enhance catalytic activity.
  • CoMoO4-CoP/NC is a promising, cost-effective electrocatalyst for efficient water splitting.
  • The material demonstrates potential for practical applications in electrolyzers.