Jump to main content
Jump to site search


MoC based Mott–Schottky electrocatalyst for boosting the hydrogen evolution reaction performance

Author affiliations

Abstract

Searching for promising HER electrocatalysts is an urgent task for the practical application of hydrogen production by water electrolysis. The Mott–Schottky effect between a metal with larger work function and n-type semiconductor with a higher Fermi level will facilitate the electron transfer from the semiconductor toward the metal. As a result, it is possible to design optimal H* adsorption active sites with thermoneutral hydrogen adsorption free energy (ΔGH*). Herein, MoC nanoparticles with a diameter of about 3.4 nm embedded in N, P-codoped carbon were converted from well-defined polyoxometalates (around 1 nm) and polypyrrole nanocomposites by carbonization and further wrapped on the surface of CNTs. On the basis of improved electron transfer rate, increased carrier densities, and enhanced active site activities on MoC after lowering the work function due to the Mott–Schottky effect with n-type domains in N, P-codoped carbon, our electrocatalysts could drive the current density of 10 mA cm−2 at 175 mV with a Tafel slope of 62 mV dec−1 and TOF value of 1.49 s−1 at 150 mV, as well as long-term H2 production stability. The present study provides a new guideline for the design and preparation of Mott–Schottky HER electrocatalysts.

Graphical abstract: MoC based Mott–Schottky electrocatalyst for boosting the hydrogen evolution reaction performance

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Oct 2019, accepted on 31 Oct 2019 and first published on 06 Nov 2019


Article type: Paper
DOI: 10.1039/C9SE00897G
Sustainable Energy Fuels, 2020, Advance Article

  •   Request permissions

    MoC based Mott–Schottky electrocatalyst for boosting the hydrogen evolution reaction performance

    X. Ji, K. Wang, Y. Zhang, H. Sun, Y. Zhang, T. Ma, Z. Ma, P. Hu and Y. Qiu, Sustainable Energy Fuels, 2020, Advance Article , DOI: 10.1039/C9SE00897G

Search articles by author

Spotlight

Advertisements