Journal
JOURNAL OF CATALYSIS
Volume 361, Issue -, Pages 322-330Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2018.03.011
Keywords
Heterostructure; Electronic coupling; Electrocatalysis; Oxygen evolution reaction; DFT calculations
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Funding
- National Natural Science Foundation of China [51672049]
- Recruitment Program of Global Youth Experts (National Thousand Young Talents Program)
- Research Grant for Talent Introduction of Fudan University, China [JJH2021103]
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The design of efficient and nonprecious electrocatalysts towards oxygen evolution reaction (OER) is extremely essential for a wide range of renewable energy technologies but remains a grand challenge. Herein, a novel hybrid composite constructed from Co9S8/Co-doped ZnS (Zno(0.8)Co(0.2)S) nanorods with the atomic-level coupled nanointerface rooted in porous carbon polyhedra (Co9S8/Zn0.8Co0.2S@C) have been fabricated and investigated as a highly efficient electrocatalyst for OER. The composite catalyst can afford a current density of 10 mA cm(-2) at a low overpotential of only 292 mV and a small Tafel slope of similar to 52 mV decade(-1), which are superior to the state-of-the-art IrO2/C and most reported Co-based catalysts. Experimental and computational studies reveal an electronic coupling between Co9S8 and Zn0.8Co0.2S that can facilitate the electron injection from the electrode and transport to the active site, and thus generates a favorable local coordination environment and greatly enhances the OER process. (C) 2018 Elsevier Inc. All rights reserved.
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