Jump to main content
Jump to site search


Realizing the extraction of carbon from WC for in situ formation of W/WC heterostructures with efficient photoelectrochemical hydrogen evolution

Author affiliations

Abstract

Although extracting carbon atoms from carbides, as the reverse route to carbide derived carbon (CDC), may have more potentials for constructing advanced nanostructures, it has not been realized yet. As a proof of concept, in this work we realize the extraction of carbon atoms from carbide lattices by rationally controlling the reaction between carbides and Cl2. Thus, a homologous metallic W layer adhered on a WC (W/WC) heterostructure is created. Based on experimental results, such a W/WC heterostructure can be used as an efficient catalyst for the photoelectrocatalytic hydrogen evolution reaction (HER), where the photocurrent density at 0 V can reach up to 16 mA cm−2. Our theoretical calculations disclose that the Mott–Schottky effect accelerates electron flow across the interfaces and significantly decreases the work function of the W facet, which leads to excellent photoelectrocatalytic HER activity on the W facets. The presented results have broad implications since they demonstrate the generic capability to build homologous M/TMC heterostructures.

Graphical abstract: Realizing the extraction of carbon from WC for in situ formation of W/WC heterostructures with efficient photoelectrochemical hydrogen evolution

Back to tab navigation

Supplementary files

Publication details

The article was received on 31 Aug 2018, accepted on 02 Oct 2018 and first published on 02 Oct 2018


Article type: Communication
DOI: 10.1039/C8NH00275D
Citation: Nanoscale Horiz., 2018, Advance Article
  •   Request permissions

    Realizing the extraction of carbon from WC for in situ formation of W/WC heterostructures with efficient photoelectrochemical hydrogen evolution

    Z. Kou, T. Wang, Z. Pu, L. Wu, K. Xi and S. Mu, Nanoscale Horiz., 2018, Advance Article , DOI: 10.1039/C8NH00275D

Search articles by author

Spotlight

Advertisements