Performance of Pt/Cr2O3, Pt/ZrO2, and, Pt/γ-Al2O3 Catalysts in Total Oxidation of Methane: Effect of Metal-Support Interaction

被引：11

作者：

Corro, Grisel ^{[1
]}

Cruz-Merida, Jorge ^{[1
]}

Montalvo, Daniel ^{[1
]}

Pal, Umapada ^{[2
]}

机构：

[1] Benemerita Univ Autonoma Puebla, Inst Ciencias, Puebla 72000, Mexico

[2] Benemerita Univ Autonoma Puebla, Inst Fis, Puebla 72570, Pue, Mexico

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2021年 / 60卷 / 51期

关键词：

LOW-TEMPERATURE; EMISSIONS ABATEMENT; COMBUSTION; PLATINUM; CO; ALUMINA; NANOPARTICLES; ACTIVATION; STATE; OXIDE;

D O I：

10.1021/acs.iecr.1c02902

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

We present the catalytic performance of Pt-supported Cr2O3, and ZrO2 (semiconductors), and gamma-Al2O3 (insulator) in CH4 oxidation under lean conditions. XPS analysis of the catalysts showed only Pt2+ at the Pt/gamma-Al2O3 surface, and stable (Ptx-Pty) dipolar catalytic sites at the surface of Pt/Cr2O3 and Pt/ZrO2. The presence of such dipolar moieties increases the polarization probability of methane molecules, resulting in an increment of the molecule's kinetic energy and in an increase of the strength of its impact with the catalyst surface, weakening the C-H bond energy and enhancing hydrogen detachment from CH4 adsorbed molecules. The detachment of this hydrogen is the ratedetermining step of the reaction. The formation and stability of the Pt-x-Pt-y dipolar moieties have been related to the electronic effects associated with platinum and metal oxide semiconductor support interactions. Results reported in this investigation demonstrate the possibility of tuning the catalytic activity of Pt supported on metal oxides for methane oxidation by controlling the nature of the Pt-x-Pt-y dipolar moieties at the surface of metal oxide supports by selecting the semiconducting supports of suitable work functions.

引用

页码：18841 / 18852

页数：12

共 56 条

[11] INVESTIGATION OF THE ACTIVE STATE OF SUPPORTED PALLADIUM CATALYSTS IN THE COMBUSTION OF METHANE [J].

BURCH, R ;

URBANO, FJ .

APPLIED CATALYSIS A-GENERAL, 1995, 124 (01) :121-138

[12] Some aspects of hydrocarbon activation on platinum group metal combustion catalysts [J].

Burch, R ;

Loader, PK ;

Urbano, FJ .

CATALYSIS TODAY, 1996, 27 (1-2) :243-248

[13] Control of Metal Nanocrystal Size Reveals Metal-Support Interface Role for Ceria Catalysts [J].

Cargnello, Matteo ;

Doan-Nguyen, Vicky V. T. ;

Gordon, Thomas R. ;

Diaz, Rosa E. ;

Stach, Eric A. ;

Gorte, Raymond J. ;

Fornasiero, Paolo ;

Murray, Christopher B. .

SCIENCE, 2013, 341 (6147) :771-773

[14] Methane oxidation over Pt/Al2O3 and Pd/Al2O3 catalysts under transient conditions [J].

Carlsson, Per-Anders ;

Fridell, Erik ;

Skoglundh, Magnus .

CATALYSIS LETTERS, 2007, 115 (1-2) :1-7

[15] Virtual Control for High Conversion of Methane Over Supported Pt [J].

Carlsson, Per-Anders ;

Nordstrom, Michael ;

Skoglundh, Magnus .

TOPICS IN CATALYSIS, 2009, 52 (13-20) :1962-1966

[16]

Carother F. P., 2003, ENV PROTECTION AGENC

[17] Reactivity of Chemisorbed Oxygen Atoms and Their Catalytic Consequences during CH4-O2 Catalysis on Supported Pt Clusters [J].

Chin, Ya-Huei ;

Buda, Corneliu ;

Neurock, Matthew ;

Iglesia, Enrique .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (40) :15958-15978

[18] Catalytic combustion of methane over palladium-based catalysts [J].

Ciuparu, D ;

Lyubovsky, MR ;

Altman, E ;

Pfefferle, LD ;

Datye, A .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 2002, 44 (04) :593-649

[19] EFFECT OF PRETREATMENT ON A PLATINIZED TIN OXIDE CATALYST USED FOR LOW-TEMPERATURE CO OXIDATION [J].

DRAWDY, JE ;

HOFLUND, GB ;

GARDNER, SD ;

YNGVADOTTIR, E ;

SCHRYER, DR .

SURFACE AND INTERFACE ANALYSIS, 1990, 16 (1-12) :369-374

[20]

Escard J., 1975, B SOC CHIM FR, P2400

← 1 2 3 4 5 6 →