Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 8, Issue 22, Pages 8338-8347Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c02158
Keywords
oxygen reduction reaction; three-dimensional network; phthalocyanine; hydrogel; single atom
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Funding
- Natural Science Foundation of Beijing Municipality [2192010, 2182012]
- National Natural Science Foundation [11179033]
- Capacity Building for Sci-Tec Innovation-Fundamental Scientific Research Funds [025185305000/210]
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Herein, a novel hydrogel-derived three-dimensional network-like nanostructured CoOx/Co-N-C(800) catalyst was synthesized. CoOx nanoparticles are embedded on N-doped carbon with single Co atoms anchored after pyrolysis. The as-prepared CoOx/Co-N-C(800) catalyst possesses excellent electrochemical performance toward the oxygen reduction reaction with a positive onset and half-wave potential of 0.9S and 0.88 V (vs RHE), respectively, including almost a four-electron pathway (3.97) and better durability compared with the 20% commercial Pt/C catalyst in an alkaline electrolyte. Also, the results demonstrate that the high performance is attributed to the synergistic effect of CoOx nanoparticles and single Co atoms.
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