Journal article icon

Journal article

Adsorbed intermediates in oxygen reduction on platinum nanoparticles observed by in situ IR spectroscopy

Abstract:
The sluggish kinetics of oxygen reduction to water remains a significant limitation in the viability of proton exchange membrane fuel cells, yet details of the four electron oxygen reduction reaction remain elusive. Here we apply in situ infrared spectroscopy to probe surface chemistry of a commercial carbon‐supported Pt nanoparticle catalyst during oxygen reduction. Infrared spectra show potential dependent appearance of adsorbed superoxide and hydroperoxide intermediates on Pt. This strongly supports an associative pathway for oxygen reduction. Analysis of the adsorbates alongside the catalytic current suggests that another pathway must also be in operation, consistent with a parallel dissociative pathway.
Publication status:
Published
Peer review status:
Peer reviewed

Actions

  • Cite

  • Print

Access Document

Files:
Publisher copy:
10.1002/anie.201804978

Authors

More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Chemistry; Inorganic Chemistry
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Chemistry
Sub department:
Inorganic Chemistry
Oxford college:
Jesus College
Role:
Author

Publisher:
Wiley‐VCH Verlag
Journal:
Angewandte Chemie (International ed. in English) More from this journal
Volume:
57
Issue:
39
Pages:
12855-12858
Publication date:
2018-08-28
Acceptance date:
2018-07-12
DOI:
EISSN:
1521-3773
ISSN:
1433-7851
Pmid:
30001472

Language:
English
Keywords:
Pubs id:
pubs:868885
UUID:
uuid:e803dcdc-ce1e-41f5-8028-a1db018de92f
Local pid:
pubs:868885
Source identifiers:
868885
Deposit date:
2018-07-26

Terms of use

Views and Downloads





If you are the owner of this record, you can report an update to it here: Report update to this record

TO TOP