Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 51, Issue -, Pages 312-322Publisher
ELSEVIER
DOI: 10.1016/j.jechem.2020.03.066
Keywords
Electrochemical ozone production; PtZn; Single-atom catalysts; Size effect; Synergistic effect
Funding
- National Natural Science Foundation of China [NSFC-21776251, 21625604, 21671172 and91934302]
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Electrochemical ozone production (EOP) via water electrolysis represents an attractive method for the generation of high-purity O-3 . Herein, the X-PtZn/Zn-N-C electrocatalysts show a strong structural sensitive behavior depends on the size of the PtZn nanoparticles and their EOP activity exhibits a volcano-type dependence for the O-3 performance in neutral media. The 7.7-PtZn/Zn-N-C exhibits EOP current efficiency of 4.2%, and shows the prominent performance in the production of gaseous O-3 with a value of 1647 ppb at 30 min, which is almost 4-fold compared to 2.2-PtZn/Zn-N-C. Based on the experiments and theoretical calculations, the performance of the EOP process was determined by the nanoparticle size-effect and the synergistic effect between the PtZn nanoparticles and atomically dispersed Zn-N-C. Furthermore, the five membered cyclic structure of O-3 can be stabilized between the PtZn nanoparticle and the Zn-N-C support, indicating that O-3 is produced at the interface. (c) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
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