Journal
ELECTROCHIMICA ACTA
Volume 376, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2021.138048
Keywords
Cluster; Ternary sulfides; Bifunctional electrocatalyst; Oxygen evolution reaction; Oxygen reduction reaction
Categories
Funding
- National Natural Science Foundation of China [21875150, 22071165, D20015]
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This study utilized a simple self-assembly method to fabricate a series of novel ternary sulfide hybrids as oxygen electrocatalysts, showing superior catalytic activity, thus providing more promising non-noble metal materials for energy application.
Applying metal sulfides in the electrochemical systems is a currently emerging field owing to the unique physicochemical properties and low-cost. Although ternary sulfides have been explored as oxygen electrocatalysts, they are usually mono-functional and undergo a complicated preparation process. Herein, via a facile and mild self-assembly method induced by electrostatic interaction, a series of novel ternary sulfide hybrids (denoted as MInS/NH2-CNT, M = Co, Fe or Mn) were fabricated as bifunctional oxygen electrocatalysts using supertetrahedral metal sulfide nanoclusters (T4 clusters) with uniformly distributed ternary component as precursors. The synergistic effect between T4 clusters-aggregated nanoparticles and amino carbon nanotubes (i.e., NH2-CNT) endows the hybrids with oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalytic activity. Among the as-synthesized MInS/NH2-CNT, CoInS/NH2-CNT reveals superior electrocatalytic performance for the OER (overpotential of 398 mV at 10 mA cm(-2)) and ORR (half-wave potential of 0.76 V vs. RHE). The strategy developed here can be easily adopted to construct other cluster-based hybrid materials for electrocatalysts, thus providing more promising non-noble metal materials for energy application. (C) 2021 Elsevier Ltd. All rights reserved.
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