Surface Adsorption Affects the Performance of Alkaline Anion-Exchange Membrane Fuel Cells

Material interactions at the polymer electrolytes–catalyst interface play a significant role in the catalytic efficiency of alkaline anion-exchange membrane fuel cells (AEMFCs). In this work, the surface adsorption behaviors of the cation–hydroxide–water and phenyl groups of polymer electrolytes on...

Full description

Saved in:
Bibliographic Details
Published in:ACS catalysis 2018-10, Vol.8 (10), p.9429-9439
Main Authors: Maurya, Sandip, Dumont, Joseph H, Villarrubia, Claudia Narvaez, Matanovic, Ivana, Li, Dongguo, Kim, Yu Seung, Noh, Sangtaik, Han, Junyoung, Bae, Chulsung, Miller, Hamish A, Fujimoto, Cy H, Dekel, Dario R
Format: Article
Language:English
Subjects:
Alkaline membrane fuel cell
anion exchange membrane fuel cells
Catalysis
catalyst−ionomer interface
cation adsorption
Chemical Sciences
ENERGY STORAGE
hydrogen absorption
hydrogen oxidation catalyst
palladium
phenyl adsorption
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:Material interactions at the polymer electrolytes–catalyst interface play a significant role in the catalytic efficiency of alkaline anion-exchange membrane fuel cells (AEMFCs). In this work, the surface adsorption behaviors of the cation–hydroxide–water and phenyl groups of polymer electrolytes on Pd- and Pt-based catalysts are investigated using two Pd-based hydrogen oxidation catalystsPd/C and Pd/C-CeO2and two Pt-based catalystsPt/C and Pt-Ru/C. The rotating disk electrode study and complementary density functional theory calculations indicate that relatively low coadsorption of cation–hydroxide–water of the Pd-based catalysts enhances the hydrogen oxidation activity, yet substantial hydrogenation of the surface adsorbed phenyl groups reduces the hydrogen oxidation activity. The adsorption-driven interfacial behaviors of the Pd- and Pt-based catalysts correlate well with the AEMFC performance and short-term stability. This study gives insight into the potential use of non-Pt hydrogen oxidation reaction catalysts that have different surface adsorption characteristics in advanced AEMFCs.
ISSN:2155-5435
2155-5435
DOI:10.1021/acscatal.8b03227