Tailoring electrocatalytic activity of in situ crafted perovskite oxide nanocrystals via size and dopant control
Abstract
The ability to scrutinize the correlation of dimension, composition, and dopant to electrocatalytic performance renders the development of highly active electrocatalysts. This work reports a general and robust strategy for crafting uniform perovskite oxide nanoparticles (i.e., BaTiO 3 and La- and Co-doped BaTiO 3 ) with controlled sizes and dopant compositions by employing amphiphilic star-like diblock copolymers as nanoreactors. Their size- and dopant-dependent oxygen reduction reaction (ORR) performances are unveiled. Particularly, La- and Co-doped BaTiO 3 nanoparticles exhibit markedly improved ORR activities over the pristine counterparts due to reduced free energy barrier of ORR and increased conductivity as substantiated by density functional theory. The nanoreactor strategy could be conveniently extended to yield various functional nanomaterials of interest with tailored sizes and compositions for electrocatalysis.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 14, 2021
- Source ID
- 10.1073/pnas.2014086118
Entities
People
- Hai-Ping Cheng
- Jiawei Zhang
- Jun Jiang
- Lei Zhu
- Qiong Li
- Shuang Liang
- Shuanglong Liu
- Yan Yan
- Yanjie He
- Yeu-wei Harn
- Zewei Wang
- Zhiqun Lin
- Zili Li
Organizations
- Air Force Office of Scientific Research
- Case Western Reserve University
- Georgia Tech
- National Science Foundation
- Office of Basic Energy Sciences
- University of Florida