Ha Thanh Duy Cam Do Ha Huu LEE, HEE HYEON Ha Nguyen Ngoc Ha Nguyen Thi Thu Ahn Sang Hyun Oh Youngtak Kim Soo Young Kim Myung-Gil 2024-01-12T03:01:26Z 2024-01-12T03:01:26Z 2022-11-24 2022-07 2040-3364 https://pubs.kist.re.kr/handle/201004/76662 Molybdenum disulfide (MoS2)-based materials are extensively studied as promising hydrogen evolution reaction (HER) catalysts. In order to bring out the full potential of chalcogenide chemistry, precise control over the active sulfur sites and enhancement of electronic conductivity need to be achieved. This study develops a highly active HER catalyst with an optimized active site-controlled cobalt molybdenum sulfide (CoMo3S13) chalcogel/graphene oxide aerogel heterostructure. The highly active CoMo3S13 chalcogel catalyst was achieved by the synergetic catalytic sites of [Mo3S13](2-) and the Mo-S-Co bridge. The optimized GO/CoMo3S13 chalcogel heterostructure catalyst exhibited high catalytic HER performance with an overvoltage of 130 mV, a current density of 10 mA cm(-2), a small Tafel slope of 40.1 mV dec(-1), and remarkable stability after 12 h of testing. This study presents a successful example of a synergistic heterostructure exploiting both the appealing electrical functionality of GO and catalytically active [Mo3S13](2-) sites. English Royal Society of Chemistry A GO/CoMo3S13 chalcogel heterostructure with rich catalytic Mo-S-Co bridge sites for the hydrogen evolution reaction Article 10.1039/D2NR01800D 1 Nanoscale, v.14, no.26, pp.9331 - 9340 Nanoscale 14 26 9331 9340 N scie scopus 000810655100001