Journal article
Hydrogen Evolution on Supported Incomplete Cubane-type [Mo3S4](4+) Electrocatalysts
Department of Physics, Technical University of Denmark1
NanoChemistry, Department of Chemistry, Technical University of Denmark2
Department of Chemistry, Technical University of Denmark3
Metalloprotein Chemistry and Engineering, Department of Chemistry, Technical University of Denmark4
Surface Physics and Catalysis, Department of Physics, Technical University of Denmark5
Center for Individual Nanoparticle Functionality, Centers, Technical University of Denmark6
Center for Nanoteknologi, Centers, Technical University of Denmark7
Electrocatalytic properties of biomimetic supported incomplete cubane-type [Mo3S4](4+) clusters are investigated. The activity toward the hydrogen evolution reaction (HER) is evaluated on both a high surface area gas diffusion electrode in a membrane electrode assembly and on highly orientated pyrolytic graphite (HOPG) supports.
Sub-monolayers of the clusters were imaged by means of scanning tunnelling microscopy (STM) prior to electrochemical characterization. This enabled the quantification of the activity on a per cluster basis for the HER and the comparison of the activity with other HER catalysts. We find that the HER activity of the [Mo3S4](4+) is comparable with that of the edge sites of MoS2.
The supported [Mo3S4](4+) molecules were also characterized by X-ray photoelectron spectroscopy (XPS), and the observed deterioration in electrocatalytic activity with time was assigned to slow [Mo3S4](4+) cathodic desorption from the catalyst support.
| Language: | English |
|---|---|
| Year: | 2008 |
| Pages: | 17492-17498 |
| ISSN: | 19327455 and 19327447 |
| Types: | Journal article |
| DOI: | 10.1021/jp802695e |
| ORCIDs: | Zhang, Jingdong and Chorkendorff, Ib |
