@article{Cai2023, 
author = {Shichang Cai and Zihan Meng and Gaojie Li and Yu An and Yapeng Cheng and Erjun Kan and Bo Ouyang and Haining Zhang and Haolin Tang},
title = {Nitrogen doped porous carbon-based bifunctional oxygen electrocatalyst with controllable phosphorus content for zinc-air battery},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {4},
pages = {5887-5893},
keywords = {cobalt-nitrogen doped porous carbon, phosphorus doping, bifunctional electrocatalyst, oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), Zn-air battery},
url = {https://www.sciopen.com/article/10.1007/s12274-022-5126-4},
doi = {10.1007/s12274-022-5126-4},
abstract = {The controllable construction of non-noble metal based bifunctional catalysts with high activities towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is of great significance, but remains a challenge. Herein, we reported an effective method to synthesize cobalt-nitrogen doped mesoporous carbon-based bifunctional oxygen electrocatalyst with controllable phosphorus content (Co-N-PX-MC, X = 0.5, 1.0, 1.5, 2.0). The mesoporous carbon substrate endowed the as-prepared samples with more exposed active surface (236.50 m2·g−1) and the most appropriate doping ratio of phosphorus had been investigated to be 1.5 (Co-N-P1.5-MC). For ORR, Co-N-P1.5-MC exhibited excellent catalytic activity with more positive onset potential (1.01 V) and half-wave potential (0.84 V) than the other samples. For OER, Co-N-P1.5-MC also showed a low overpotential of 415 mV. Combining experimental results and density-functional theory (DFT) calculations, the outstanding bifunctional catalytic performance of Co-N-P1.5-MC was due to the synergistic cooperation between the P and N dopants, which could reduce the reaction barriers and was favorable for ORR and OER. Moreover, the Zn-air battery using Co-N-P1.5-MC as the cathode showed remarkable battery performance with high stability (could operate stably for over 160 h at 10 mA·cm−2) and maximum power density (119 mW·cm−2), demonstrating its potential for practical applications. This work could provide significant enlightenment towards the design and construction of bifunctional oxygen electrocatalyst for next-generation electrochemical devices.}
}