Lee, Cheol-Ho Lee, Sungho Kang, Gil-Seong Lee, Youn-Ki Park, Gwan Gyu Lee, Doh C. Joh, Han-Ik 2024-01-19T18:32:46Z 2024-01-19T18:32:46Z 2021-09-05 2019-12-05 0926-3373 https://pubs.kist.re.kr/handle/201004/119213 Hydrogen evolution reaction (HER) activity of the molybdenum sulfide-based electrocatalysts originates from diverse types of active sulfur (S) sites, different S configurations, the ratio of molybdenum to S, and the crystallinity. The bridging S-2(2-) has been considered as the major active site for HER. However, to realize more efficient electrocatalysts, newer architectures based on molybdenum sulfide are required to allow more active S sites beyond the endemic structural limits. Hence, the facile aging approach is used to maximize the bridging S-2(2-) in amorphous molybdenum sulfide by adding (NH4)(2)S-x, leading to the highest proportion of bridging S-2(2-) (up to 67%). Additionally, the effect of S configuration on HER activity in molybdenum sulfide is systematically studied by controlling of the amount of bridging S-2(2-). The bridging S-rich electrocatalysts exhibits an excellent HER activity with low onset potential of -96 mV and Tafel slope of 46 mV dec(-1), and stability for 1000 cycles. English ELSEVIER EDGE SITES MOS2 CATALYST ELECTROCATALYSTS NANOSHEETS THIOMOLYBDATE NANOPARTICLES OXYGEN FILMS Insight into the superior activity of bridging sulfur-rich amorphous molybdenum sulfide for electrochemical hydrogen evolution reaction Article 10.1016/j.apcatb.2019.117995 1 APPLIED CATALYSIS B-ENVIRONMENTAL, v.258 APPLIED CATALYSIS B-ENVIRONMENTAL 258 scie scopus 000487570000053 2-s2.0-85070057024 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article EDGE SITES MOS2 CATALYST ELECTROCATALYSTS NANOSHEETS THIOMOLYBDATE NANOPARTICLES OXYGEN FILMS Bridging sulfur Amorphous molybdenum sulfide Electrocatalyst Hydrogen evolution reaction