Sulfur poisoning of emergent and current electrocatalysts: Vulnerability of MoS2, and direct correlation to Pt hydrogen evolution reaction kinetics

Shu Min Tan; Zdeněk Sofer; Martin Pumera

doi:10.1039/c5nr01378j

Sulfur poisoning of emergent and current electrocatalysts: Vulnerability of MoS₂, and direct correlation to Pt hydrogen evolution reaction kinetics

Shu Min Tan, Zdeněk Sofer, Martin Pumera

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

The recent surge in interest in the utilisation of transition metal dichalcogenides for the hydrogen evolution reaction (HER), as well as the long-standing problem of sulfur poisoning suffered by the established Pt HER electrocatalyst, motivated us to examine the impacts of sulfur poisoning on both emergent and current electrocatalysts. Through a comparative study between MoS₂ and Pt/C on the effects of sulfur poisoning, we demonstrate that MoS₂ is not invulnerable to poisoning. Additionally, using X-ray photoelectron spectroscopy, correlations have also been established between the atomic percentages of Pt-S bonds and normalised HER parameters e.g. Tafel slope and potential at -10 mA cm^-2. These findings are of high importance for potential hydrogen evolution catalysis.

Original language	English
Pages (from-to)	8879-8883
Number of pages	5
Journal	Nanoscale
Volume	7
Issue number	19
DOIs	https://doi.org/10.1039/c5nr01378j
Publication status	Published - 2015 May 21

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

Materials Science(all)

Access to Document

10.1039/c5nr01378j

Cite this

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abstract = "The recent surge in interest in the utilisation of transition metal dichalcogenides for the hydrogen evolution reaction (HER), as well as the long-standing problem of sulfur poisoning suffered by the established Pt HER electrocatalyst, motivated us to examine the impacts of sulfur poisoning on both emergent and current electrocatalysts. Through a comparative study between MoS2 and Pt/C on the effects of sulfur poisoning, we demonstrate that MoS2 is not invulnerable to poisoning. Additionally, using X-ray photoelectron spectroscopy, correlations have also been established between the atomic percentages of Pt-S bonds and normalised HER parameters e.g. Tafel slope and potential at -10 mA cm-2. These findings are of high importance for potential hydrogen evolution catalysis.",

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