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Efficient porous molybdenum diselenide catalyst for electrochemical hydrogen generation

Abstract

The design and development of inexpensive and highly efficient electrocatalysts for hydrogen production underpin several emerging clean-energy technologies. In this work, we show a novel strategy to synthesize vertical aligned porous MoSe2 by two-step co-electrodeposition/etching method. The morphology of the porous MoSe2 can be easily tuned by merely varying the Mo/Cu ratio. First, a matrix composite MoSe2/Cu3Se2 was prepared by electrodeposition and subsequently etched Cu3Se2 to form porous MoSe2 structures. The obtained perpendicularly oriented porous MoSe2 material exhibit an excellent electrochemical hydrogen generation catalytic performance without the need for a transferring material step. This designed architecture based on an oriented vertical structure possesses fully exposed active edges and open structures for fast ion/electron transfer, leads to remarkable HER activity with a low onset potential of −0.10 V vs. RHE (reversible hydrogen electrode), a small Tafel slope of 46 mV per decade and excellent long-cycle stability. This work opens a new class of nanomaterials for the development of an efficient hybrid HER catalyst.

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Publication details

The article was received on 05 Jul 2017, accepted on 02 Sep 2017 and first published on 04 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA05826H
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Efficient porous molybdenum diselenide catalyst for electrochemical hydrogen generation

    S. Poorahong, R. Izquierdo and M. Siaj, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA05826H

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