In Situ Formation of Isolated Bimetallic PtCe Sites of Single-Dispersed Pt on CeO 2 for Low-Temperature CO Oxidation - Details

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Abstract：

Identification　of　the　chemical　states　of　catalytic　sites　is　critical　for　an　atomic-level　understanding　of　catalytic　mechanisms.　Herein,　hydrogen　thermal　pretreatment　of　the　Pt　single　atoms　on　porous　nanorods　of　CeO　2　(Pt　1　/PN-CeO　2　)　induced　the　formation　of　isolated　bimetallic　PtCe　sites　as　a　new　type　of　active　center　for　CO　oxidation.　The　evolutions　of　Pt　1　/PN-CeO　2　catalysts　during　the　hydrogen　pretreatment　and　CO　oxidation　were　examined　by　various　in　situ　techniques　including　infrared,　ambient-pressure　X-ray　photoelectron　and　X-ray　absorption　spectroscopy.　The　experimental　results　demonstrate　that　these　bimetallic　sites　can　be　partially　preserved　or　reoxidized　into　Pt-O-Ce　with　a　low　coordination　number　with　oxygen　under　realistic　conditions,　leading　to　the　appropriate　CO　adsorption　and　activating　the　efficient　activity　of　Pt　1　/PN-CeO　2　for　CO　oxidation　at　low　temperature.　©　2018　American　Chemical　Society.

Keyword：

bimetallic PtCe sites; CO oxidation; in situ formation; porous nanorods of CeO 2; Pt single atoms

Community：

[ 1 ] [Li, J.]Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China
[ 2 ] [Li, J.]Center for Applied Chemical Research, Frontier Institute of Science and Technology, Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi'An Jiaotong University, Xi'an, 710049, China
[ 3 ] [Tang, Y.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 4 ] [Tang, Y.]Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, KS 66047, United States
[ 5 ] [Ma, Y.]Center for Applied Chemical Research, Frontier Institute of Science and Technology, Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi'An Jiaotong University, Xi'an, 710049, China
[ 6 ] [Zhang, Z.]Center for Applied Chemical Research, Frontier Institute of Science and Technology, Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi'An Jiaotong University, Xi'an, 710049, China
[ 7 ] [Tao, F.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 8 ] [Tao, F.]Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, KS 66047, United States
[ 9 ] [Qu, Y.]Center for Applied Chemical Research, Frontier Institute of Science and Technology, Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi'An Jiaotong University, Xi'an, 710049, China

Reprint 's Address：

[Tao, F.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou UniversityChina

Email：

franklin.feng.tao@ku.edu

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Source ：

ACS Applied Materials and Interfaces

ISSN： 1944-8244

Year： 2018

Issue： 44

Volume： 10

Page： 38134-38140

8 . 4 5 6

JCR@2018

8 . 5 0 0

JCR@2023

ESI HC Threshold：284

JCR Journal Grade：1

CAS Journal Grade：2

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WoS CC Cited Count：

SCOPUS Cited Count：

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 2

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