Journal
CARBON
Volume 156, Issue -, Pages 514-522Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2019.09.087
Keywords
Metal free carbon catalyst; High performance polymers; Heteroatom doping; Oxygen reduction reaction
Funding
- National Key Research and Development Program of China [2018YFA0306100]
- Recruitment Program of Global Young Experts of China
- Sichuan one thousand Talents Plan
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It has been a major challenge to dispose the unrenewable high-performance polymers (HPPs) after their large-scale application in our society. Here we report an approach to reuse one kind of HPP as carbon and sulfur sources in synthesizing nitrogen and sulfur dual-doped honeycomb-like porous carbon catalysts for oxygen reduction reaction. Briefly, poly(phenylene sulfide sulfone) with S atoms in polymer chain as sulfur source, dicyandiamide as nitrogen source and SiO2 nanoparticles as hard-template are pyrolyzed in designed temperatures under argon atmosphere. Then N, S dual-doped carbon catalysts (N, S@C) are obtained after subjected etching treatment. By adjusting moderate amount of SiO2, the optimized catalyst (denoted as N, S@C-M-1000) pyrolyzed at 1000 degrees C, shows best ORR electrocatalytic activity in alkaline environment. Impressively, when N, S@C-M-1000 is used as a cathode catalyst, the corresponding assembled zinc-air batteries exhibit a maximum power density of 90 mW cm(-2) with long-term durability and high rate capacity. Therefore, this work provides a feasible way to resolve and reuse the unrenewable HPP for synthesizing heteroatom doped carbon-based catalysts. (C) 2019 Elsevier Ltd. All rights reserved.
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