A Co-MOF-derived Co9S8@NS-C electrocatalyst for efficient hydrogen evolution reaction
Open Access
- 3 February 2021
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in RSC Advances
- Vol. 11 (11), 5947-5957
- https://doi.org/10.1039/d0ra10864b
Abstract
The exploitation of efficient hydrogen evolution reaction (HER) electrocatalysts has become increasingly urgent and imperative; however, it is also challenging for high-performance sustainable clean energy applications. Herein, novel Co9S8 nanoparticles embedded in a porous N,S-dual doped carbon composite (abbr. Co9S8@NS-C-900) were fabricated by the pyrolysis of a single crystal Co-MOF assisted with thiourea. Due to the synergistic benefit of combining Co9S8 nanoparticles with N,S-dual doped carbon, the composite showed efficient HER electrocatalytic activities and long-term durability in an alkaline solution. It shows a small overpotential of −86.4 mV at a current density of 10.0 mA cm−2, a small Tafel slope of 81.1 mV dec−1, and a large exchange current density (J0) of 0.40 mA cm−2, which are comparable to those of Pt/C. More importantly, due to the protection of Co9S8 nanoparticles by the N,S-dual doped carbon shell, the Co9S8@NS-C-900 catalyst displays excellent long-term durability. There is almost no decay in HER activities after 1000 potential cycles or it retains 99.5% of the initial current after 48 h.Funding Information
- National Natural Science Foundation of China (21771095, 21571092, 21601079)
- Natural Science Foundation of Shandong Province (ZR2017JL013)
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