Multicomponent platinum-free nanoporous Pd-based alloy as an active and methanol-tolerant electrocatalyst for the oxygen reduction reaction

Development of high-performance oxygen reduction reaction （ORR） catalysts is crucial to improve proton exchange membrane fuel cells. Herein, a multicomponent nanoporous PdCuTiA1 （np-PdCuTiA1） electrocatalyst has been synthesized by a facile one-step dealloying strategy. The np-PdCuTiA1 catalyst exhi...

Full description

Saved in:
Bibliographic Details
Published in:Nano research 2016-06, Vol.9 (6), p.1831-1843
Main Authors: Chen, Xiaoting, Si, Conghui, Wang, Ying, Ding, Yi, Zhang, Zhonghua
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Catalysis
Catalysts
Chemical synthesis
Chemistry and Materials Science
Condensed Matter Physics
Density functional theory
Electrocatalysts
Fuel technology
Materials Science
Methanol
Methyl alcohol
Nanostructure
Nanotechnology
Oxygen
Oxygen reduction reactions
Platinum
Platinum base alloys
Proton exchange membrane fuel cells
Reduction
Research Article
Tafel slopes
Three dimensional
催化剂
催化活性
基合金
多组分
氧还原反应
甲醇
纳米多孔
质子交换膜燃料电池
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:Development of high-performance oxygen reduction reaction （ORR） catalysts is crucial to improve proton exchange membrane fuel cells. Herein, a multicomponent nanoporous PdCuTiA1 （np-PdCuTiA1） electrocatalyst has been synthesized by a facile one-step dealloying strategy. The np-PdCuTiA1 catalyst exhibits a three-dimensional bicontinuous interpenetrating ligament/channel structure with an ultrafine length scale of -3.7 nm. The half-wave potential of np PdCuTiA1 is 0.873 V vs. RHE, more positive than those of PdC （0.756 V vs. RHE） and PtC （0.864 V vs. RHE） catalysts. The np-PdCuTiAl alloy shows a 4-electron reaction pathway with similar Tafel slopes to PtC. Remarkably, the half-wave potential shows a negative shift of only 12 mV for np-PdCuTiA1 in the presence of methanol, and this negative shift is much lower than those of the PdC （50 mV） and PtC （165 mV） catalysts. The enhanced ORR activity of np-PdCuTiA1 has been further rationalized through density functional theory calculations.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-016-1076-z