Direct deposition of MoSe2 nanocrystals onto conducting substrates: towards ultra-efficient electrocatalysts for hydrogen evolution

Damien, Dijo and Anil, Athira and Chatterjee, Dipanwita and Shaijumon, M M (2017) Direct deposition of MoSe2 nanocrystals onto conducting substrates: towards ultra-efficient electrocatalysts for hydrogen evolution. In: JOURNAL OF MATERIALS CHEMISTRY A, 5 (26). pp. 13364-13372.

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Abstract

There is an urgent need to develop efficient and cost-effective catalysts for the hydrogen evolution reaction (HER) in order to realize a hydrogen economy with clean and renewable energy. Nanostructures of layered transition metal dichalcogenides show promising electrocatalytic activity towards the hydrogen evolution reaction, however, the majority of the exposed surfaces (basal planes) are inactive, and engineering their catalytically active edge sites still remains a challenge. Here we show that monodisperse single/fewlayered MoSe2 nanocrystals can be directly deposited onto any conducting substrate, through electrochemical exfoliation of bulk MoSe2, which exhibit remarkable electrocatalytic activity for the HER with ultra-high efficiency showing a very low on-set potential (70.9 mV vs. the RHE) and Tafel slope (31.8 mV dec (1)). The exceptional electrocatalytic activity of the MoSe2 nanocrystals results from the synergistic advantages emerging from improved edge sites, enhanced electronic conductivity and the presence of new and active sites arising upon in situ lithiation, all in one step, which is facile, economic and environmentally benign.

Item Type:	Journal Article
Publication:	JOURNAL OF MATERIALS CHEMISTRY A
Additional Information:	Copy right for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	03 Aug 2017 10:21
Last Modified:	03 Aug 2017 10:21
URI:	http://eprints.iisc.ac.in/id/eprint/57571

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