Synthesis of MoS2(1-: X)Se2 x and WS2(1-x)Se2 x alloys for enhanced hydrogen evolution reaction performance

Sajjad Hussain, Kamran Akbar, Dhanasekaran Vikraman, K. Karuppasamy, Hyun Seok Kim, Seung Hyun Chun, Jongwan Jung

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Herein, we demonstrate the synthesis of molybdenum disulphoselenide (MoS2(1-x)Se2x) and tungsten disulphoselenide (WS2(1-x)Se2x) alloys onto FTO substrates, to obtain a higher hydrogen evolution reaction (HER) activity compared to pristine MoS2 and WS2. By incorporating selenium (Se) into MoS2 and WS2 matrices, an excellent HER catalytic activity was ensured in an acidic electrolyte with overpotentials of 141 mV and 167 mV @ 10 mA cm-2 with Tafel slopes of 67 and 107 mV per decade for MoS2(1-x)Se2x and WS2(1-x)Se2x, respectively. Moreover, MoS2(1-x)Se2x and WS2(1-x)Se2x alloys showed robust durability over 20 h of continuous HER operation in acidic solutions. Our investigation provides the synthesis of tunable metal dichalcogenide hybrid structures with better electrochemical performance.

Original languageEnglish
Pages (from-to)2068-2074
Number of pages7
JournalInorganic Chemistry Frontiers
Volume4
Issue number12
DOIs
StatePublished - Dec 2017

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