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W-doped MoS2 nanosheets as a highly-efficient catalyst for hydrogen peroxide electroreduction in alkaline media

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Abstract

Novel W-doped MoS2 electrocatalysts have been successfully fabricated through a facile one-pot solvothermal method and employed for the hydrogen peroxide reduction reaction (HPRR) in emerging alkaline H2O2-based fuel cells. The wide composition stoichiometry of W-doped MoS2 is obtained in molar fractions of 30% and 15%. It has been found that 30% W-doped MoS2 presents superior catalytic activity with a high peak current density of 2.83 mA cm−2 at −0.86 V vs. Hg/HgO, owing to the heteroatom doping and the defect sites that emerged in the nanostructure. Furthermore, the influence of alkali concentration, H2O2 concentration and temperature on the HPRR is systematically investigated. The mechanism of HPRR is illustrated using a rotating disk electrode as a direct two-electron electroreduction pathway. Thereby, a new insight into heteroatom doping in transition metal dichalcogenides for HPRR applications is provided.

Graphical abstract: W-doped MoS2 nanosheets as a highly-efficient catalyst for hydrogen peroxide electroreduction in alkaline media

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Publication details

The article was received on 26 Jul 2017, accepted on 14 Oct 2017 and first published on 16 Oct 2017


Article type: Paper
DOI: 10.1039/C7CY01509G
Citation: Catal. Sci. Technol., 2017, Advance Article
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    W-doped MoS2 nanosheets as a highly-efficient catalyst for hydrogen peroxide electroreduction in alkaline media

    Y. Xue, W. Cai, S. Zheng, W. Yan, J. Hu, Z. Sun, Y. Zhang and W. Jin, Catal. Sci. Technol., 2017, Advance Article , DOI: 10.1039/C7CY01509G

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