The influence of the local atomic packing of thin MoSx films on their electrocatalytic properties in hydrogen reduction View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2017-08

AUTHORS

V. Yu. Fominski, V. N. Nevolin, R. I. Romanov, D. V. Fominskii, P. S. Dzhumaev

ABSTRACT

We have studied the characteristics of the structure, composition, and electrocatalytic properties of thin MoSx films obtained by pulsed laser deposition using an Mo target ablated in H2S reactive-gas medium. The laser plume during deposition was directed tangentially and normally to the substrate, which allowed amorphous films to be obtained with different local atomic packings in an amorphous matrix consisting of Mo3–S clusters. It is established that the orientation of Mo3–S clusters influences charge transport in the catalyst and determines the type and surface density of catalytically active sites in the reaction of hydrogen evolution. For small, approximately equal amounts of Mo and Pt (~4 μg/cm2) laser-deposited on glassy carbon substrates, the MoSx films were inferior to a Pt film with respect to hydrogen overvoltage (by about 90 mV) in acid solution, but the efficiency of thin-film MoSx catalysts at elevated cathode potentials exceeded that of a thin Pt film. More... »

PAGES

770-773

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1063785017080181

DOI

http://dx.doi.org/10.1134/s1063785017080181

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1091423108


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