Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 4, Pages 1163-1167Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201812423
Keywords
carbon defects; fuel cells; oxygen reduction reaction; platinum; single-atom catalysts
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Funding
- National Natural Science Foundation of China [U1601211, 21721003, 21733004, 21633008, 21703107]
- K. C. Wong Education Foundation
- Science and Technology Innovation Foundation of Jilin Province for Talents Cultivation [20160519005JH, 20160520137JH]
- China Postdoctoral Science Foundation [2016M601254]
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Maximizing the platinum utilization in electrocatalysts toward oxygen reduction reaction (ORR) is very desirable for large-scale sustainable application of Pt in energy systems. A cost-effective carbon-supported carbon-defect-anchored platinum single-atom electrocatalysts (Pt-1/C) with remarkable ORR performance is reported. An acidic H-2/O-2 single cell with Pt-1/C as cathode delivers a maximum power density of 520 mW cm(-2) at 80 degrees C, corresponding to a superhigh platinum utilization of 0.09 g(Pt) kW(-1). Further physical characterization and density functional theory computations reveal that single Pt atoms anchored stably by four carbon atoms in carbon divacancies (Pt-C-4) are the main active centers for the observed high ORR performance.
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