Jump to main content
Jump to site search

Issue 9, 2019
Previous Article Next Article

Regulating effect of heterojunctions on electrocatalytic oxidation of methanol for Pt/WO3-NaTaO3 catalysts

Author affiliations

Abstract

Pt/WO3-NaTaO3 composite catalysts for different W/Ta molar ratios were obtained via a facile hydrothermal method. The WO3-NaTaO3 heterojunction was constituted and could be regulated by the adjustment of the W : Ta ratio, as confirmed by multiple characterizations. Due to the favorable CO anti-poisoning characteristics ascribed to the sufficient surface –OHad provided by both WO3 and NaTaO3, excellent stability of the WO3-NaTaO3 composite in acidic and alkaline environments, and charge transfer from metal oxide to Pt, the as-obtained Pt/WO3-NaTaO3 composite catalyst could exhibit desirably high electrocatalytic performances. As a result, the as-prepared Pt/WO3-NaTaO3 (W : Ta = 3 : 1) and Pt/WO3-NaTaO3 (W : Ta = 0.2 : 1) products exhibited optimal performances in the methanol oxidation reaction (MOR) process in acids and alkalis, respectively, as compared to those of commercial Pt/C, Pt/NaTaO3, and Pt/WO3 catalysts. In particular, in acidic and alkaline environments, the highest electrocatalytic activity of Pt/WO3-NaTaO3 catalyst could reach three times that of commercial Pt/C and its stability could reach more than five times that of commercial Pt/C. Density functional theory calculations further proved the enhancement of WO3 with regard to methanol electrooxidation.

Graphical abstract: Regulating effect of heterojunctions on electrocatalytic oxidation of methanol for Pt/WO3-NaTaO3 catalysts

Back to tab navigation

Supplementary files

Publication details

The article was received on 21 Dec 2018, accepted on 01 Feb 2019 and first published on 02 Feb 2019


Article type: Paper
DOI: 10.1039/C8DT05045G
Dalton Trans., 2019,48, 3061-3073

  •   Request permissions

    Regulating effect of heterojunctions on electrocatalytic oxidation of methanol for Pt/WO3-NaTaO3 catalysts

    X. Bi, P. Bai, J. Lv, T. Yang, Z. Chai, X. Wang and C. Wang, Dalton Trans., 2019, 48, 3061
    DOI: 10.1039/C8DT05045G

Search articles by author

Spotlight

Advertisements