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Yu W, Qi J, Hu X, Qiao S, Shang J, Liu L, Wang B, Tang L, Zhang W, Cheng Y. A-site deficient La 0.52Sr 0.28Ti 0.94Ni 0.06O 3by low- pulsed electric current treatment: achieved exsolution of B-site Ni nanoparticles and significant improvement of electrocatalytic properties. Nanotechnology 2022; 33:285703. [PMID: 35385834 DOI: 10.1088/1361-6528/ac64ac] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/06/2022] [Indexed: 06/14/2023]
Abstract
Perovskite materials with exsolved nanoparticles have a wide range of applications in energy conversion systems owing to their unique basal plane active sites and excellent catalytic properties. The introduction of A-site deficiency can help the formation of highly mobile oxygen vacancies and remarkably enhance the reducibility of Ni nanoparticles, thus significantly increasing electronic conductivity and catalytic activity simultaneously. Herein, we adopt pulsed electric current (PEC) treatment, a novel approach instead of the long-time high-temperature reduction technique, and for the first time review that the exsolution of minuscule Ni nanoparticles (8-20 nm) could be facilitated on Ni-doped La0.52Sr0.28Ti0.94Ni0.06O3(LSTN) anodes with A-site deficiency. Encouragingly, finding that low PEC can successfully lead to nanoparticle exsolution and show a significantly improved oxygen evolution reaction performance of LSTN-PEC (LSTN after PEC treatment) possessing A-site deficiency, the onset potential of LSTN-PEC (500 V) (LSTN after PEC treatment with 500 V-4 Hz-90 s) was advanced by 0.173 V, theRctvalue was reduced by 82.38 Ω·cm2, and the overpotential was also reduced by 73 mV.
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Affiliation(s)
- Wenwen Yu
- School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121001, People's Republic of China
| | - Jingang Qi
- School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121001, People's Republic of China
| | - Xin Hu
- School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121001, People's Republic of China
| | - Sifan Qiao
- Electron Microscopy Center, and School of Materials Science and Engineering, Jilin University, Changchun Jilin 130012, People's Republic of China
| | - Jian Shang
- School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121001, People's Republic of China
| | - Liang Liu
- School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121001, People's Republic of China
| | - Bing Wang
- School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121001, People's Republic of China
| | - Lidan Tang
- School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121001, People's Republic of China
| | - Wei Zhang
- Electron Microscopy Center, and School of Materials Science and Engineering, Jilin University, Changchun Jilin 130012, People's Republic of China
| | - Yu Cheng
- School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121001, People's Republic of China
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