Jump to main content
Jump to site search

Issue 5, 2016
Previous Article Next Article

Nanoporous PdCr alloys as highly active electrocatalysts for oxygen reduction reaction

Author affiliations

Abstract

A simple and convenient dealloying method is used to prepare nanoporous (NP) PdCr alloys with uniform ligament dimensions and controllable bimetallic ratio. The structural characterization methods demonstrate that the NP–PdCr alloy is comprised of a nanoscaled interconnected network skeleton and hollow channels extending in all three dimensions. Electrocatalytic measurements indicated that the as-made NP–Pd75Cr25 alloy exhibits superior specific and mass activities as well as higher catalytic stability toward oxygen reduction reaction compared with NP–Pd67Cr33, NP–Pd, and commercial Pt/C catalysts. X-ray photoelectron spectroscopy and density functional theory calculations both demonstrate that the weakened Pd–O bond and improved ORR performances depend on the downshifted d-band center of Pd due to the alloying of Pd with Cr (25 at%). It is expected that the as-made NP–PdCr alloy has prospective application as a cathode electrocatalyst in fuel-cell-related technologies with the advantages of superior overall ORR performances, unique structural stability, and easy preparation.

Graphical abstract: Nanoporous PdCr alloys as highly active electrocatalysts for oxygen reduction reaction

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Nov 2015, accepted on 29 Dec 2015 and first published on 07 Jan 2016


Article type: Paper
DOI: 10.1039/C5CP07184D
Phys. Chem. Chem. Phys., 2016,18, 4166-4173

  •   Request permissions

    Nanoporous PdCr alloys as highly active electrocatalysts for oxygen reduction reaction

    H. Duan and C. Xu, Phys. Chem. Chem. Phys., 2016, 18, 4166
    DOI: 10.1039/C5CP07184D

Search articles by author

Spotlight

Advertisements