Boosting hot electron flux and catalytic activity at metal–oxide interfaces of PtCo bimetallic nanoparticles

Hyosun Lee, Juhyung Lim, Changhwan Lee, Seoin Back, Kwangjin An, Jae Won Shin, Ryong Ryoo, Yousung Jung () and Jeong Young Park ()
Additional contact information
Hyosun Lee: Institute for Basic Science (IBS)
Juhyung Lim: Korea Advanced Institute of Science and Technology (KAIST)
Changhwan Lee: Institute for Basic Science (IBS)
Seoin Back: Korea Advanced Institute of Science and Technology (KAIST)
Kwangjin An: Ulsan National Institute of Science and Technology (UNIST)
Jae Won Shin: Institute for Basic Science (IBS)
Ryong Ryoo: Institute for Basic Science (IBS)
Yousung Jung: Korea Advanced Institute of Science and Technology (KAIST)
Jeong Young Park: Institute for Basic Science (IBS)

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract Despite numerous studies, the origin of the enhanced catalytic performance of bimetallic nanoparticles (NPs) remains elusive because of the ever-changing surface structures, compositions, and oxidation states of NPs under reaction conditions. An effective strategy for obtaining critical clues for the phenomenon is real-time quantitative detection of hot electrons induced by a chemical reaction on the catalysts. Here, we investigate hot electrons excited on PtCo bimetallic NPs during H2 oxidation by measuring the chemicurrent on a catalytic nanodiode while changing the Pt composition of the NPs. We reveal that the presence of a CoO/Pt interface enables efficient transport of electrons and higher catalytic activity for PtCo NPs. These results are consistent with theoretical calculations suggesting that lower activation energy and higher exothermicity are required for the reaction at the CoO/Pt interface.

Date: 2018
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-018-04713-8 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04713-8

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-018-04713-8

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().