Activating Lattice Oxygen in Perovskite Oxide by B‐Site Cation Doping for Modulated Stability and Activity at Elevated Temperatures

Abstract Doping perovskite oxide with different cations is used to improve its electro‐catalytic performance for various energy and environment devices. In this work, an activated lattice oxygen activity in Pr0.4Sr0.6CoxFe0.9−xNb0.1O3−δ (PSCxFN, x = 0, 0.2, 0.7) thin film model system by B‐site cati...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Huijun Chen, Chaesung Lim, Mengzhen Zhou, Zuyun He, Xiang Sun, Xiaobao Li, Yongjian Ye, Ting Tan, Hui Zhang, Chenghao Yang, Jeong Woo Han, Yan Chen
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	cation doping FeO octahedra metaloxygen bond oxygen vacancy perovskite oxide Science Q
Acceso en línea:	https://doaj.org/article/ace7fc5cdee54b3ebf69254b6fe30c96
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:ace7fc5cdee54b3ebf69254b6fe30c96
record_format	dspace
spelling	oai:doaj.org-article:ace7fc5cdee54b3ebf69254b6fe30c962021-11-17T08:40:31ZActivating Lattice Oxygen in Perovskite Oxide by B‐Site Cation Doping for Modulated Stability and Activity at Elevated Temperatures2198-384410.1002/advs.202102713https://doaj.org/article/ace7fc5cdee54b3ebf69254b6fe30c962021-11-01T00:00:00Zhttps://doi.org/10.1002/advs.202102713https://doaj.org/toc/2198-3844Abstract Doping perovskite oxide with different cations is used to improve its electro‐catalytic performance for various energy and environment devices. In this work, an activated lattice oxygen activity in Pr0.4Sr0.6CoxFe0.9−xNb0.1O3−δ (PSCxFN, x = 0, 0.2, 0.7) thin film model system by B‐site cation doping is reported. As Co doping level increases, PSCxFN thin films exhibit higher concentration of oxygen vacancies (Vo••) as revealed by X‐ray diffraction and synchrotron‐based X‐ray photoelectron spectroscopy. Density functional theory calculation results suggest that Co doping leads to more distortion in FeO octahedra and weaker metaloxygen bonds caused by the increase of antibonding state, thereby lowering Vo•• formation energy. As a consequence, PSCxFN thin film with higher Co‐doping level presents larger amount of exsolved particles on the surface. Both the facilitated Vo•• formation and B‐site cation exsolution lead to the enhanced hydrogen oxidation reaction (HOR) activity. Excessive Co doping until 70%, nevertheless, results in partial decomposition of thin film and degrades the stability. Pr0.4Sr0.6(Co0.2Fe0.7Nb0.1)O3 with moderate Co doping level displays both good HOR activity and stability. This work clarifies the critical role of B‐site cation doping in determining the Vo•• formation process, the surface activity, and structure stability of perovskite oxides.Huijun ChenChaesung LimMengzhen ZhouZuyun HeXiang SunXiaobao LiYongjian YeTing TanHui ZhangChenghao YangJeong Woo HanYan ChenWileyarticlecation dopingFeO octahedrametaloxygen bondoxygen vacancyperovskite oxideScienceQENAdvanced Science, Vol 8, Iss 22, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cation doping FeO octahedra metaloxygen bond oxygen vacancy perovskite oxide Science Q
spellingShingle	cation doping FeO octahedra metaloxygen bond oxygen vacancy perovskite oxide Science Q Huijun Chen Chaesung Lim Mengzhen Zhou Zuyun He Xiang Sun Xiaobao Li Yongjian Ye Ting Tan Hui Zhang Chenghao Yang Jeong Woo Han Yan Chen Activating Lattice Oxygen in Perovskite Oxide by B‐Site Cation Doping for Modulated Stability and Activity at Elevated Temperatures
description	Abstract Doping perovskite oxide with different cations is used to improve its electro‐catalytic performance for various energy and environment devices. In this work, an activated lattice oxygen activity in Pr0.4Sr0.6CoxFe0.9−xNb0.1O3−δ (PSCxFN, x = 0, 0.2, 0.7) thin film model system by B‐site cation doping is reported. As Co doping level increases, PSCxFN thin films exhibit higher concentration of oxygen vacancies (Vo••) as revealed by X‐ray diffraction and synchrotron‐based X‐ray photoelectron spectroscopy. Density functional theory calculation results suggest that Co doping leads to more distortion in FeO octahedra and weaker metaloxygen bonds caused by the increase of antibonding state, thereby lowering Vo•• formation energy. As a consequence, PSCxFN thin film with higher Co‐doping level presents larger amount of exsolved particles on the surface. Both the facilitated Vo•• formation and B‐site cation exsolution lead to the enhanced hydrogen oxidation reaction (HOR) activity. Excessive Co doping until 70%, nevertheless, results in partial decomposition of thin film and degrades the stability. Pr0.4Sr0.6(Co0.2Fe0.7Nb0.1)O3 with moderate Co doping level displays both good HOR activity and stability. This work clarifies the critical role of B‐site cation doping in determining the Vo•• formation process, the surface activity, and structure stability of perovskite oxides.
format	article
author	Huijun Chen Chaesung Lim Mengzhen Zhou Zuyun He Xiang Sun Xiaobao Li Yongjian Ye Ting Tan Hui Zhang Chenghao Yang Jeong Woo Han Yan Chen
author_facet	Huijun Chen Chaesung Lim Mengzhen Zhou Zuyun He Xiang Sun Xiaobao Li Yongjian Ye Ting Tan Hui Zhang Chenghao Yang Jeong Woo Han Yan Chen
author_sort	Huijun Chen
title	Activating Lattice Oxygen in Perovskite Oxide by B‐Site Cation Doping for Modulated Stability and Activity at Elevated Temperatures
title_short	Activating Lattice Oxygen in Perovskite Oxide by B‐Site Cation Doping for Modulated Stability and Activity at Elevated Temperatures
title_full	Activating Lattice Oxygen in Perovskite Oxide by B‐Site Cation Doping for Modulated Stability and Activity at Elevated Temperatures
title_fullStr	Activating Lattice Oxygen in Perovskite Oxide by B‐Site Cation Doping for Modulated Stability and Activity at Elevated Temperatures
title_full_unstemmed	Activating Lattice Oxygen in Perovskite Oxide by B‐Site Cation Doping for Modulated Stability and Activity at Elevated Temperatures
title_sort	activating lattice oxygen in perovskite oxide by b‐site cation doping for modulated stability and activity at elevated temperatures
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/ace7fc5cdee54b3ebf69254b6fe30c96
work_keys_str_mv	AT huijunchen activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures AT chaesunglim activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures AT mengzhenzhou activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures AT zuyunhe activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures AT xiangsun activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures AT xiaobaoli activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures AT yongjianye activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures AT tingtan activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures AT huizhang activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures AT chenghaoyang activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures AT jeongwoohan activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures AT yanchen activatinglatticeoxygeninperovskiteoxidebybsitecationdopingformodulatedstabilityandactivityatelevatedtemperatures
_version_	1718425690117767168

Activating Lattice Oxygen in Perovskite Oxide by B‐Site Cation Doping for Modulated Stability and Activity at Elevated Temperatures

Ejemplares similares