Boosting the stability of perovskites with exsolved nanoparticles by B-site supplement mechanism

Bo-Wen Zhang, Meng-Nan Zhu, Min-Rui Gao, Xiuan Xi, Nanqi Duan, Zhou Chen, Ren-Fei Feng, Hongbo Zeng and Jing-Li Luo ()
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Bo-Wen Zhang: University of Alberta
Meng-Nan Zhu: University of Alberta
Min-Rui Gao: University of Alberta
Xiuan Xi: Shenzhen University
Nanqi Duan: University of Alberta
Zhou Chen: Xiamen University
Ren-Fei Feng: Canadian Light Source Inc.
Hongbo Zeng: University of Alberta
Jing-Li Luo: University of Alberta

Nature Communications, 2022, vol. 13, issue 1, 1-12

Abstract: Abstract Perovskites with exsolved nanoparticles (P-eNs) have immense potentials for carbon dioxide (CO2) reduction in solid oxide electrolysis cell. Despite the recent achievements in promoting the B-site cation exsolution for enhanced catalytic activities, the unsatisfactory stability of P-eNs at high voltages greatly impedes their practical applications and this issue has not been elucidated. In this study, we reveal that the formation of B-site vacancies in perovskite scaffold is the major contributor to the degradation of P-eNs; we then address this issue by fine-regulating the B-site supplement of the reduced Sr2Fe1.3Ni0.2Mo0.5O6-δ using foreign Fe sources, achieving a robust perovskite scaffold and prolonged stability performance. Furthermore, the degradation mechanism from the perspective of structure stability of perovskite has also been proposed to understand the origins of performance deterioration. The B-site supplement endows P-eNs with the capability to become appealing electrocatalysts for CO2 reduction and more broadly, for other energy storage and conversion systems.

Date: 2022
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DOI: 10.1038/s41467-022-32393-y

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