[Mo3S13]2− Cluster Decorated Sulfur-doped Reduced Graphene Oxide as Noble Metal-Free Catalyst for Hydrogen Evolution Reaction in Polymer Electrolyte Membrane Electrolyzers

Pham C, Zana A, Arenz M, Thiele S (2018)

Publication Type: Journal article

Publication year: 2018

Journal

ChemElectroChem Wiley

Book Volume: 5

Pages Range: 2672-2680

Journal Issue: 18

DOI: 10.1002/celc.201800719

Abstract

Non-noble metal catalysts represent a central direction of seminal scientific research in electrocatalysis due to the high cost and scarcity of present Pt-based catalysts for the hydrogen evolution reaction (HER) in particular. Here, we develop a novel hybrid material of [Mo3S13]2− clusters decorated sulfur doped reduced graphene oxide (Mo3S13-SrGO) as a HER catalyst for water electrolyzers. Doped S elements act as anchor points for [Mo3S13]2− cluster attachment via forming doped S−Mo coordinate bonds, which increase stability of the hybrid catalyst as well as contribute additional active sites for the HER. SrGO supports substantially enhance the activity of the hybrid catalyst, maintaining high catalyst utilization at high loading. In standard electrochemical tests, the Mo3S13-SrGO catalyst exhibits a Tafel slope of about 40 mV per decade and a current density of 10 mA cm−2 at 174 mV overpotential, which are significantly better than those exhibited by unsupported [Mo3S13]2− clusters with a Tafel slope of 53 mV per decade and an overpotential of 244 mV at 10 mA cm−2. Further, the hybrid catalyst exhibits a good working stability in acidic media. In the form of nanostructured powder, Mo3S13-SrGO can be readily processed into porous electrodes for practical applications using standard manufacturing technologies.

Authors with CRIS profile

Simon Thiele

Involved external institutions

Albert-Ludwigs-Universität Freiburg DE Germany (DE) Universität Bern CH Switzerland (CH)

How to cite

APA:

Pham, C., Zana, A., Arenz, M., & Thiele, S. (2018). [Mo3S13]2− Cluster Decorated Sulfur-doped Reduced Graphene Oxide as Noble Metal-Free Catalyst for Hydrogen Evolution Reaction in Polymer Electrolyte Membrane Electrolyzers. ChemElectroChem, 5(18), 2672-2680. https://doi.org/10.1002/celc.201800719

MLA:

Pham, Chuyen, et al. "[Mo3S13]2− Cluster Decorated Sulfur-doped Reduced Graphene Oxide as Noble Metal-Free Catalyst for Hydrogen Evolution Reaction in Polymer Electrolyte Membrane Electrolyzers." ChemElectroChem 5.18 (2018): 2672-2680.

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