Self-supporting nanoporous gold-palladium overlayer bifunctional catalysts toward oxygen reduction and evolution reactions

The oxygen reduction reaction （ORR） and oxygen evolution reaction （OER） are crucial processes for energy conversion/storage systems, such as fuel cells, metal-air batteries, and water splitting. However, both reactions are severely restricted by their sluggish kinetics, thus requiring highly active,...

Full description

Saved in:
Bibliographic Details
Published in:Nano research 2016-12, Vol.9 (12), p.3781-3794
Main Authors: Wang, Yan, Huang, Wei, Si, Conghui, Zhang, Jie, Yan, Xuejiao, Jin, Chuanhong, Ding, Yi, Zhang, Zhonghua
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Batteries
Biomedicine
Biotechnology
Catalysis
Catalysts
Chemical reduction
Chemistry and Materials Science
Condensed Matter Physics
Density functional theory
Electrocatalysts
Electronic structure
Energy conversion
Energy storage
Epitaxial growth
Evolution
Fuel technology
Gold
Kinetics
Materials Science
Nanoengineering
Nanostructure
Nanotechnology
Oxygen
Oxygen evolution reactions
Palladium
Platinum
Pt/C催化剂
Reaction kinetics
Reduction (metal working)
Research Article
Storage batteries
Storage systems
Surface chemistry
Water splitting
双功能催化剂
氧还原反应
演化
纳米多孔
自支撑
表面纳米化
金属空气电池
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The oxygen reduction reaction （ORR） and oxygen evolution reaction （OER） are crucial processes for energy conversion/storage systems, such as fuel cells, metal-air batteries, and water splitting. However, both reactions are severely restricted by their sluggish kinetics, thus requiring highly active, cost-effective, and durable electrocatalysts. Herein, we develop novel bifunctional nanocatalysts through surface nanoengineering of dealloying-driven nanoporous gold （NPG）. Pd overlayers were precisely deposited onto the NPG ligament surface by epitaxial layer-by-layer growth. More importantly, the obtained NPG-Pd overlayer nanocatalysts exhibit remarkably enhanced electrocatalytic activities toward both the ORR and OER in alkaline media, benchmarked against a state- of-the-art Pt/C catalyst. The improved electrocatalytic performance is rationalized by the unique three-dimensional nanoarchitecture of NPG, enhanced Pd utilization efficiency from precise control of the Pd overlayers, and change in electronic structure, as revealed by density functional theory calculations.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-016-1248-x