Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 142, Issue 2, Pages 715-719Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b12803
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [21902137, 21925404, 21775127, 21427813]
- Fundamental Research Funds for the Central Universities [20720190044]
- China Postdoctoral Science Foundation [2019M652250]
- China Postdoctoral Innovation Talent Support Program [BX20190184]
- MINECO (AEI/FEDER, UE) [CTQ2016-76221-P]
Ask authors/readers for more resources
The study of the oxygen reduction reaction (ORR) at high-index Pt(hkl) single crystal surfaces has received considerable interest due to their well-ordered, typical atomic structures and superior catalytic activities. However, it is difficult to obtain direct spectral evidence of ORR intermediates during reaction processes, especially at high-index Pt(hkl) surfaces. Herein, in situ Raman spectroscopy has been employed to investigate ORR processes at high-index Pt(hkl) surfaces containing the [01 (1) over bar] crystal zone-i.e., Pt(211) and Pt(311). Through control and isotope substitution experiments, in situ spectroscopic evidence of OH and OOH intermediates at Pt(211) and Pt(311) surfaces was successfully obtained. After detailed analysis based on the Raman spectra and theoretical simulation, it was deduced that the difference in adsorption of OOH at high-index surfaces has a significant effect on the ORR activity. This research illuminates and deepens the understanding of the ORR mechanism on high-index Pt(hkl) surfaces and provides theoretical guidance for the rational design of high activity ORR catalysts.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available