@article{Xu2023, 
author = {Wenjing Xu and Yidong Sun and Jiaqi Zhou and Maoqi Cao and Jun Luo and Haili Mao and Pengfei Hu and Hongfei Gu and Huazhang Zhai and Huishan Shang and Zhi Cai},
title = {Coordinatively unsaturated single Co atoms immobilized on C2N for efficient oxygen reduction reaction},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {2},
pages = {2294-2301},
keywords = {single-atom catalysts, unsaturated coordination, geometric engineering, oxygen reduction reaction, porous graphene nitride},
url = {https://www.sciopen.com/article/10.1007/s12274-022-5212-7},
doi = {10.1007/s12274-022-5212-7},
abstract = {Developing cost-effective and high-efficiency oxygen reduction reaction (ORR) catalysts is imperative for promoting the substantial progress of fuel cells and metal-air batteries. The coordination and geometric engineering of single-atom catalysts (SACs) occurred the promising approach to overcome the thermodynamics and kinetics problems in high-efficiency electrocatalysis. Herein, we rationally constructed atomically dispersed Co atoms on porous N-enriched graphene material C2N (CoSA-C2N) for efficient oxygen reduction reaction (ORR). Systematic characterizations demonstrated the active sites for CoSA-C2N is as identified as coordinatively unsaturated Co-N2 moiety, which exhibits ORR intrinsic activity. Structurally, the porous N-enriched graphene framework in C2N could effectively increase the accessibility to the active sites and promote mass transfer rate, contributing to improved ORR kinetics. Consequently, CoSA-C2N exhibited superior ORR performance in both acidic and alkaline conditions as well as impressive long-term durability. The coordination and geometric engineering of SACs will provide a novel approach to advanced catalysts for energy related applications.}
}