Promoting the Oxygen Evolution Activity of Perovskite Nickelates through Phase Engineering

Yong Wang, Chen Huang, Kaifeng Chen, Yang Zhao, Jingxuan He, Shibo Xi, Pei Chen, Xingyu Ding, Xiaoqiang Wu, Qingquan Kong, Xuguang An, Fazal Raziq, Xiaotao Zu, Yonghua Du, Haiyan Xiao, Kelvin H.L. Zhang, Liang Qiao

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Perovskite oxides have emerged as promising candidates for the oxygen evolution reaction (OER) electrocatalyst due to their flexible lattice structure, tunable electronic structure, superior stability, and cost-effectiveness. Recent research studies have mostly focused on the traditional methods to tune the OER performance, such as cation/anion doping, A-/B-site ordering, epitaxial strain, oxygen vacancy, and so forth, leading to reasonable yet still limited activity enhancement. Here, we report a novel strategy for promoting the OER activity for perovskite LaNiO3 by crystal phase engineering, which is realized by breaking long-range chemical bonding through amorphization. We provide the first and direct evidence that perovskite oxides with an amorphous structure can induce the self-adaptive process, which helps enhance the OER performance. This is evidenced by the fact that an amorphous LaNiO3 film on glassy carbon shows a 9-fold increase in the current density compared to that of an epitaxial LaNiO3 single crystalline film. The obtained current density of 1038 μΑ cm-2 (@ 1.6 vs RHE) is the largest value among the literature reported values. Our work thus offers a new protocol to boost the OER performance for perovskite oxides for future clean energy applications.
Original languageEnglish (US)
Pages (from-to)58566-58575
Number of pages10
JournalACS Applied Materials and Interfaces
Volume13
Issue number49
DOIs
StatePublished - Dec 15 2021
Externally publishedYes

ASJC Scopus subject areas

  • General Materials Science

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