abstract
Two-dimensional (2D) materials have gained significant attention as ideal templates for constructing single-atom catalysts (SACs), which maximizes the exposure of active sites and ensures uniform dispersion of metal atoms. Herein, a novel two-dimensional (2D) CoZn-MOF nanosheet was synthesized, which was used as a precursor to construct a N-doped carbon catalyst modified with Co single atoms (Co SAs-NC). During the calcination process, the nitrogen atoms in ligands were converted into a N-doped carbon matrix, effectively anchoring Co ions and generating uniformly distributed Co-Nx active sites. Co SAs-NC exhibited superior ORR performance compared to Pt/C, with a half-wave potential of 0.886 V. Additionally, zinc-air batteries (ZABs) based on Co SAs-NC exhibit a peak power density of 134 mW cm(-2), significantly exceeding that of Pt/C (89 mW cm(-2)). The completion of this work will provide new insights into developing efficient 2D carbon-based non-precious metal ORR catalysts.
subject category
Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
authors
Chen, J; Lei, QY; Sun, LL; Gao, F; Wang, X; Wei, JM; Song, XK; Fu, LS; Yang, TH
our authors
Lianshe Fu
Junior Researcher
Tinghai Yang
Post-doc FellowshipProjects
Nano-argilas para remoção/captura de fosfatos (P) e sua reutilização como fertilizante (NATURAL)
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 22375078) , the Changzhou Sci & Tech Program (CZ20240024) , the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No. 23KJA430007) , the Postgraduate Research & Practice Innovation Program of Jiangsu Province (SJCX23_1648) , the College Students Training Program of Innovation and Entrepreneurship of Jiangsu Province (202411463075Y) and the Preparation and Detection of a High Purity Tetramethylammonium Hydroxide Developing Solution (BY20230939) . This work was also developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MCTES (PIDDAC) .