A comparative study of CO preferential oxidation over Pt and Pt0.5Co0.5 nanoparticles: Kinetic study and quantum-chemical calculations

被引：14

作者：

Potemkin, D., I ^{[1
,2
]}

Filatov, E. Yu ^{[1
,3
]}

Zadesenets, A., V ^{[1
,3
]}

Gorlova, A. M. ^{[1
,2
]}

Nikitina, N. A. ^{[4
]}

Pichugina, D. A. ^{[4
]}

机构：

[1] Novosibirsk State Univ, Pirogova St 2, Novosibirsk 630090, Russia

[2] Boreskov Inst Catalysis, Pr Lavrentieva 5, Novosibirsk 630090, Russia

[3] Nikolaev Inst Inorgan Chem, Pr Lavrentieva 3, Novosibirsk 630090, Russia

[4] Moscow MV Lomonosov State Univ, Dept Chem, Leninskie Gory St 1, Moscow 119991, Russia

来源：

MATERIALS LETTERS | 2020年 / 260卷

基金：

俄罗斯科学基金会;

关键词：

Pt-Co catalysts; Bimetallic catalysts; Preferential CO oxidation; Density functional theory; Nanoparticles; Interfaces; DOUBLE COMPLEX SALT; SELECTIVE OXIDATION; CATALYSIS; HYDROGEN; MODEL; ALLOYS;

D O I：

10.1016/j.matlet.2019.126915

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

CO preferential (PROX) and total (TOX) oxidation were studied over Pt and Pt0.5Co0.5 nanopowders. Pt0.5Co0.5 exhibited much higher CO PROX performance than Pt, being highly active and selective at 0-80 degrees C. Low-temperature activity in CO oxidation was shown to be the key feature of bimetallic Pt-Co catalysts in comparison with monometallic Pt. Density functional theory calculations of the oxidation of CO on Pt-13 and Pt12Co clusters revealed that a better catalytic activity of bimetallic cluster is due to an electronic effect: the calculated atomic charges on platinum atoms change when cobalt is introduced into its composition. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：3

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