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.
|Number of pages||7|
|Early online date||4 Mar 2016|
|Publication status||Published - 2016|
Bibliographical noteThis article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Electronic supplementary information (ESI) available. See DOI: 10.1039/c6ra03326a