Electrocatalytic regeneration of atmospherically aged MoS2 nanostructures via solution-phase sulfidation

H.A. Burch; M. Isaacs; K. Wilson; R.E. Palmer; N.V. Rees

doi:10.1039/c6ra03326a

Electrocatalytic regeneration of atmospherically aged MoS₂ nanostructures via solution-phase sulfidation

H.A. Burch, M. Isaacs, K. Wilson, R.E. Palmer, N.V. Rees

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Abstract

The performance of MoS₂ as a hydrogen evolution catalyst is diminished by exposure to air. We demonstrate a solution phase technique to resulfidate MoS_xO_2-x using Na₂S₂O₃. The success of the method was judged by performance as a H⁺ reduction catalyst. Following sulfidation samples displayed a favourable decrease in both onset potential and Tafel slope, with the best decreasing from -0.23 V to -0.18 V (vs. SHE), and 282 mV dec^-1 to 87 mV dec^-1 respectively. Ageing studies indicate that this method may be used to recycle the MoS₂ repeatedly without losing catalytic performance, although repeated sulfidation did result in homogenisation of the nanostructure.

Original language	English
Pages (from-to)	26689-26695
Number of pages	7
Journal	RSC advances
Volume	6
Issue number	32
Early online date	4 Mar 2016
DOIs	https://doi.org/10.1039/c6ra03326a
Publication status	Published - 2016

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This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.

Funding: EPSRC

Electronic supplementary information (ESI) available. See DOI: 10.1039/c6ra03326a

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Electrocatalytic regeneration of atmospherically aged MoS2 nanostructures
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title = "Electrocatalytic regeneration of atmospherically aged MoS2 nanostructures via solution-phase sulfidation",

abstract = "The performance of MoS2 as a hydrogen evolution catalyst is diminished by exposure to air. We demonstrate a solution phase technique to resulfidate MoSxO2-x using Na2S2O3. The success of the method was judged by performance as a H+ reduction catalyst. Following sulfidation samples displayed a favourable decrease in both onset potential and Tafel slope, with the best decreasing from -0.23 V to -0.18 V (vs. SHE), and 282 mV dec-1 to 87 mV dec-1 respectively. Ageing studies indicate that this method may be used to recycle the MoS2 repeatedly without losing catalytic performance, although repeated sulfidation did result in homogenisation of the nanostructure.",

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AU - Isaacs, M.

AU - Wilson, K.

AU - Palmer, R.E.

AU - Rees, N.V.

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AB - The performance of MoS2 as a hydrogen evolution catalyst is diminished by exposure to air. We demonstrate a solution phase technique to resulfidate MoSxO2-x using Na2S2O3. The success of the method was judged by performance as a H+ reduction catalyst. Following sulfidation samples displayed a favourable decrease in both onset potential and Tafel slope, with the best decreasing from -0.23 V to -0.18 V (vs. SHE), and 282 mV dec-1 to 87 mV dec-1 respectively. Ageing studies indicate that this method may be used to recycle the MoS2 repeatedly without losing catalytic performance, although repeated sulfidation did result in homogenisation of the nanostructure.

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Electrocatalytic regeneration of atmospherically aged MoS₂ nanostructures via solution-phase sulfidation

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