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Surfaces, Volume 2, Issue 4 (December 2019) – 3 articles
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Cover Story (view full-size image) One of the most pressing needs of the emerging hydrogen economy is the development of sustainable [...] Read more. One of the most pressing needs of the emerging hydrogen economy is the development of sustainable catalysts for the electrochemical production of hydrogen from water. Transition metal chalcogenides, given their large availability and low cost, represent an excellent choice; however, their catalytic performance is still inadequate for practical devices. Here, we demonstrate that nickel can be used to boost the catalytic activity of MoS2 both in alkaline and acid media. By combining different characterization techniques to the study of the electrochemical performances, we deduced that NiSx species help the hydrogen evolution in alkaline conditions by facilitating water dissociation, whereas in acid conditions, nickel dopants (Ni–Mo–S) improve catalytic activity through a combination of structural and electronic effects. View this paper.