Dual-Defects Adjusted Crystal-Field Splitting of LaCo1-xNixO3-δHollow Multishelled Structures for Efficient Oxygen Evolution

被引：110

作者：

Wang, Huan ^{[1
,2
]}

Qi, Jian ^{[2
,3
]}

Yang, Nailiang ^{[2
,3
]}

Cui, Wei ^{[3
]}

Wang, Jiangyan ^{[2
,3
]}

Li, Qinghao ^{[4
]}

Zhang, Qinghua ^{[4
]}

Yu, Xiqian ^{[4
]}

Gu, Lin ^{[4
]}

Li, Jiong ^{[7
]}

Yu, Ranbo ^{[1
]}

Huang, Keke ^{[5
]}

Song, Shuyan ^{[6
]}

Feng, Shouhua ^{[5
]}

Wang, Dan ^{[2
,3
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Dept Phys Chem, Beijing 100083, Peoples R China

[2] Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[5] Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China

[6] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130012, Peoples R China

[7] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201210, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2020年 / 59卷 / 44期

基金：

中国国家自然科学基金;

关键词：

defects; hollow multishelled structures; oxygen evolution reaction; perovskite oxides; rare-earth compounds; HOLLOW MICROSPHERES; PERFORMANCE; SNO2;

D O I：

10.1002/anie.202007077

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To boost the performance for various applications, a rational bottom-up design on materials is necessary. The defect engineering on nanoparticle at the atomic level can efficiently tune the electronic behavior, which offers great opportunities in enhancing the catalytic performance. In this paper, we optimized the surface oxygen vacancy concentration and created the lattice distortion in rare-earth-based perovskite oxide through gradient replacement of the B site with valence alternated element. The dual defects make the electron spin state transit from low spin state to high spin state, thus decreasing the charge transport resistance. Furthermore, assembly the modified nanoparticle subunits into the micro-sized hollow multishelled structures can provide porous shells, abundant interior space and effective contact, which enables an enhanced mass transfer and a shorter charge transport path. As a result, the systemic design in the electronic and nano-micro structures for catalyst has brought an excellent oxygen evolution performance.

引用

页码：19691 / 19695

页数：5