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|Title:||Atomically dispersed cobalt trifunctional electrocatalysts with tailored coordination environment for flexible rechargeable Zn–air battery and self-driven water splitting||Authors:||Zhang, Zheye
Pennycook, Stephen J.
|Keywords:||Science::Chemistry::Physical chemistry::Catalysis||Issue Date:||2020||Source:||Zhang, Z., Zhao, X., Xi, S., Zhang, L., Chen, Z., Zeng, Z., Huang, M., Yang, H., Liu, B., Pennycook, S. J. & Chen, P. (2020). Atomically dispersed cobalt trifunctional electrocatalysts with tailored coordination environment for flexible rechargeable Zn–air battery and self-driven water splitting. Advanced Energy Materials, 10(48), 2002896-. https://dx.doi.org/10.1002/aenm.202002896||Project:||AMEIRG18-0016
|Journal:||Advanced Energy Materials||Abstract:||Designing multifunctional catalysts with high activity, stability, and low-cost for energy storage and conversion is a significant challenge. Herein, a trifunctional electrocatalyst is synthesized by anchoring individually dispersed Co atoms on N and S codoped hollow carbon spheres (CoSA/N,S-HCS), which exhibits outstanding catalytic activity and stability for the oxygen reduction reaction, oxygen evolution reaction, and hydrogen evolution reaction. When equipped in liquid or flexible solid-state rechargeable Zn–air batteries, CoSA/N,S-HCS endows them with high power and energy density as well as excellent long-term cycling stability, outperforming benchmark batteries based on a commercial Pt/C + RuO dual catalyst system. Furthermore, a self-driven water splitting system powered by flexible Zn–air batteries is demonstrated using CoSA/N,S-HCS as the sole catalyst, giving a high H2 evolution rate of 184 µmol/h. The state-of-art experimental characterizations and theoretical calculations reveal synergistic cooperation between atomically dispersed Co-N active sites, nearby electron-donating S dopants, and the unique carbon support to single-atom catalysts (SACs). This work demonstrates a general strategy to design various multifunctional SAC systems with a tailored coordination environment.||URI:||https://hdl.handle.net/10356/147539||ISSN:||1614-6840||DOI:||10.1002/aenm.202002896||Rights:||© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||SCBE Journal Articles|
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