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Catalytic Synergy on PtNi Bimetal Catalysts Driven by Interfacial Intermediate Structures

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Title
Catalytic Synergy on PtNi Bimetal Catalysts Driven by Interfacial Intermediate Structures
Author(s)
Taek-Seung Kim; Jeongjin Kim; Hee Chan Song; Daeho Kim; Beomgyun Jeong; Jouhahn Lee; Jae Won Shin; Ryong Ryoo; Jeong Young Park
Publication Date
2020-09
Journal
ACS CATALYSIS, v.10, no.18, pp.10459 - 10467
Publisher
AMER CHEMICAL SOC
Abstract
© American Chemical Societysignificantly impacts catalysis. A molecular-level understanding of intermediate structures created during catalysis is essential for developing high-performance bimetal catalysts. We show that intermediate Pt-NiO1-x interfacial structures drive the catalytic synergistic effect observed on Pt3Ni nanocrystals. Real-time microscopic observations at ambient pressure show the formation of oxygen-driven Ni oxide clusters on the surface and provide direct evidence of Pt-NiO1-x interfacial structure formation. Spectroscopic analysis, including ambient-pressure X-ray photoelectron spectroscopy and diffuse reflectance infrared Fourier-transform spectroscopy, and catalytic measurements elucidate the role of Pt-NiO1-x interfacial structures and the catalytic reaction mechanism in CO oxidation. Our results indicate that metal-oxide interfacial intermediate structures in bimetal catalysts relate to the catalytic enhancement of the strong metal-support interaction (SMSI) effect
URI
https://pr.ibs.re.kr/handle/8788114/9054
DOI
10.1021/acscatal.0c02467
ISSN
2155-5435
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
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