钙钛矿(结构)
纳米颗粒
材料科学
降级(电信)
化学工程
纳米技术
机制(生物学)
Boosting(机器学习)
计算机科学
物理
工程类
量子力学
电信
机器学习
作者
Bowen Zhang,Mengnan Zhu,Min‐Rui Gao,Xiuan Xi,Nanqi Duan,Zhou Chen,Renfei Feng,Hongbo Zeng,Jing‐Li Luo
标识
DOI:10.1038/s41467-022-32393-y
摘要
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.
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