Jump to main content
Jump to site search

Issue 28, 2017
Previous Article Next Article

Hierarchically structured, oxygen deficient, tungsten oxide morphologies for enhanced photoelectrochemical charge transfer and stability

Author affiliations

Abstract

The role of non-stoichiometry in a hierarchically structured WO3−x electrode, constituted from nanoscale fuzziness as well as microscale wire morphology, on the photoelectrochemical response is investigated. Through X-ray photoelectron spectroscopy (XPS) studies, the relative amounts of the various oxidation states of the constituent W are probed with respect to the observed response. It is concluded that an intermediate/optimal number of vacancies, yielding a W6+/(W5+ + W4+) ratio of around 2, would be beneficial for increasing the photocurrent. It is posited that defect engineering combined with optimized band structure modulation could be used for enhanced photocurrent density as well as electrode stability. The work would help considerably elucidate the role of defects as well as charge carriers for oxygen evolution reaction (OER) efficiency increase.

Graphical abstract: Hierarchically structured, oxygen deficient, tungsten oxide morphologies for enhanced photoelectrochemical charge transfer and stability

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 May 2017, accepted on 19 Jun 2017 and first published on 20 Jun 2017


Article type: Paper
DOI: 10.1039/C7TA04118G
Citation: J. Mater. Chem. A, 2017,5, 14898-14905
  •   Request permissions

    Hierarchically structured, oxygen deficient, tungsten oxide morphologies for enhanced photoelectrochemical charge transfer and stability

    P. Chen, M. Baldwin and P. R. Bandaru, J. Mater. Chem. A, 2017, 5, 14898
    DOI: 10.1039/C7TA04118G

Search articles by author

Spotlight

Advertisements