Tri phenyl phosphine-Assisted Exsolution Engineering on Ruddlesden-Popper Perovskites for Promoting Oxygen Evolution

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外文摘要：Metal exsolution engineering has been regarded as a promising strategy for activating intrinsically inert perovskite oxide catalysts toward efficient oxygen evolution reaction.Traditional metal exsolution processes on perovskites are often achieved by using the reducing hydrogen gas;however,this is not effective for the relatively stable phase,such as Ruddlesden-Popper perovskite oxides.To address this issue,triphenylphosphine is proposed to be a reduction promotor for accelerating the reduction and migration of the target metal atoms,aiming to achieve the effective exsolution of metallic species from Ruddlesden-Popper-type parent perovskites.Upon oxygen evolution reaction,these exsolved metallic aggregates are reconstructed into oxyhydroxides as the real active centers.After further modification by low-percentage iridium oxide nanoclusters,the optimal catalyst delivered an overpotential as low as 305 mV for generating the density of 10 mA cm-2,outperforming these reported noble metal-containing perovskite-based alkaline oxygen evolution reaction electrocatalysts.This work provides a potential approach to activate catalytically inert oxides through promoting surface metal exsolution and explores a novel class of Ruddlesden-Popper-type oxides for electrocatalytic applications.

外文关键词：

exsolutionoxygen evolutionperovskitereconstructionRuddlesden-Popper

作者：

Juan Bai、Jing Shang、Jun Mei、Dongchen Qi、Ting Liao、Ziqi Sun

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作者单位：

School of Chemistry and Physics,Queensland University of Technology,2 George Street,Brisbane,Qld 4000,Australia

Centre for Materials Science,Queensland University of Technology,2 George Street,Brisbane,Qld 4000,Australia

School of Materials Science and Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China

School of Mechanical Medical and Process Engineering,Queensland University of Technology,2 George Street,Brisbane,Qld 4000,Australia

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基金：

Australian Research Council Discovery ProjectsAustralian Research Council Discovery ProjectsAustralian Research Council Future FellowshipsAustralian Research Council Future FellowshipsQUT ECR Scheme Grant

项目编号：

DP230101625DP200103568FT180100387FT1601002812020001179

出版年：

2024

DOI：

10.1002/eem2.12668

能源与环境材料(英文)

ISSN：

年,卷(期)：2024.7(4)