High-Affinity-Assisted Nanoscale Alloys as Remarkable Bifunctional Catalyst for Alcohol Oxidation and Oxygen Reduction Reactions

A key challenge in developing fuel cells is the fabrication of low-cost electrocatalysts with high activity and long durability for the two half-reactions, i.e., the methanol/ethanol oxidation reaction (MOR/EOR) and the oxygen reduction reaction (ORR). Herein, we report a conductivity-enhanced bifun...

Full description

Saved in:
Bibliographic Details
Published in:ACS nano 2017-08, Vol.11 (8), p.7729-7735
Main Authors: Tiwari, Jitendra N, Lee, Wang Geun, Sultan, Siraj, Yousuf, Muhammad, Harzandi, Ahmad M, Vij, Varun, Kim, Kwang S
Format: Article
Language:English
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:A key challenge in developing fuel cells is the fabrication of low-cost electrocatalysts with high activity and long durability for the two half-reactions, i.e., the methanol/ethanol oxidation reaction (MOR/EOR) and the oxygen reduction reaction (ORR). Herein, we report a conductivity-enhanced bifunctional electrocatalyst of nanoscale-coated Pt–Pd alloys on both tin-doped indium (TDI) and reduced graphene oxide (rGO), denoted as Pt–Pd@TDI/rGO. The mass activities of Pt in the Pt–Pd@TDI/rGO hybrid toward MOR, EOR, and ORR are 2590, 1500, and 2690 mA/mg, respectively. The ORR Pt specific activity and mass activity of the electrocatalyst are 17 and 28 times larger, respectively, than commercial Pt/C catalysts. All these remarkable catalytic performances are attributed to the role of TDI in enhancing the catalytic activity by protecting Pt from oxidation as well as rapid mass/charge transfer due to the synergistic effect between surface Pt–Pd alloys and TDI/rGO.
ISSN:1936-0851
1936-086X
DOI:10.1021/acsnano.7b01073