Electrocatalytic Hydrogen Evolution from Molybdenum Sulfide-Polymer Composite Films on Carbon Electrodes.

The design of more efficient catalytic electrodes remains an important objective for the development of H2O splitting electrolyzers. In this context a structured composite cathode material was synthesized by electrodeposition of Mo sulfide (MoSx) into a poly(pyrrole-alkylammonium) matrix, previously coated onto C electrodes by oxidative electropolymn. of a pyrrole-alkylammonium monomer. The composite material showed an efficient electrocatalytic activity toward proton redn. and the H evolution reaction (HER). Data from Tafel plots demonstrated that the electron transfer rate in the composite films is fast, in agreement with the high catalytic activity of this cathode material. Bulk electrolysis of acidic H2O at C foam electrodes modified with the composite showed that the cathodes display a high catalytic activity and a reasonable operational stability, largely exceeding that of regular amorphous MoSx electrodeposited on naked C foam. The enhanced catalytic performances of the composite electrode material were attributed to the structurization of the composite, which led to a homogeneous distribution of the catalyst on the C foam network, as shown by SEM characterizations. [on SciFinder(R)]

Références

Titre
Electrocatalytic Hydrogen Evolution from Molybdenum Sulfide-Polymer Composite Films on Carbon Electrodes.
Type de publication
Article de revue
Année de publication
2015
Revue
ACS Appl. Mater. Interfaces
Volume
7
Pagination
15866–15875
ISSN
1944-8244
Soumis le 12 avril 2018