Promotion of the Water-Gas-Shift Reaction by Nickel Hydroxyl Species in Partially Reduced Nickel-Containing Phyllosilicate Catalysts

被引：85

作者：

Ashok, Jangam ^{[1
]}

Li Ang, Ming ^{[1
]}

Terence, Puar Zhi Liang ^{[1
]}

Kawi, Sibudjing ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 119260, Singapore

来源：

CHEMCATCHEM | 2016年 / 8卷 / 07期

关键词：

hydrogen; nickel; reduction; silicates; surface chemistry; SUPPORTED PLATINUM CATALYSTS; TAR MODEL-COMPOUND; LOW-TEMPERATURE; BIMETALLIC CATALYSTS; METHANE SUPPRESSION; REACTION-MECHANISM; RH/CEO2; CATALYSTS; NI/SIO2; MESOPOROUS CERIA; CO ADSORPTION;

D O I：

10.1002/cctc.201501284

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The role of surface hydroxyl species generated by partially reduced Ni-containing phyllosilicate structures (Ni/SiO2P) in promoting the water-gas-shift (WGS) reaction and methane suppression was investigated. To analyze the effect of the surface hydroxyl species, Ni/SiO2P catalysts reduced at various temperatures were employed. All the Ni/SiO2P catalysts showed enhanced catalytic performances and methane suppression compared to the conventional Ni/SiO2 catalyst. As revealed by diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS), methane suppression could be attributed to the inhibition of the formation of nickel subcarbonyl species, and the promotion of WGS activity was attributed to the involvement of surface hydroxyl species (Ni-OH, 3626cm(-1), and Si-OH, 3740cm(-1)). The Ni/SiO2P catalyst reduced at 600 degrees C showed exceptionally superior performance to the other catalysts in the water-gas-shift reaction in terms of turnover frequency (2.79s(-1)) and hydrogen formation rates (492.63mol H(2)g(-1)s(-1)) at 375 degrees C.

引用

页码：1308 / 1318

页数：11

共 53 条

[1]

Adekunle AS, 2014, INT J ELECTROCHEM SC, V9, P3008

[2] Water-Gas Shift Catalysis at Corner Atoms of Pt Clusters in Contact with a TiO2 (110) Support Surface [J].

Ammal, Salai Cheettu ;

Heyden, Andreas .

ACS CATALYSIS, 2014, 4 (10) :3654-3662

[3] High-temperature water-gas shift reaction over Ni/xK/CeO2 catalysts: Suppression of methanation via formation of bridging carbonyls [J].

Ang, M. L. ;

Oemar, U. ;

Kathiraser, Y. ;

Saw, E. T. ;

Lew, C. H. K. ;

Du, Y. ;

Borgna, A. ;

Kawi, S. .

JOURNAL OF CATALYSIS, 2015, 329 :130-143

[4] Highly Active Ni/xNa/CeO2 Catalyst for the Water Gas Shift Reaction: Effect of Sodium on Methane Suppression [J].

Ang, M. L. ;

Oemar, U. ;

Saw, E. T. ;

Mo, L. ;

Kathiraser, Y. ;

Chia, B. H. ;

Kawi, S. .

ACS CATALYSIS, 2014, 4 (09) :3237-3248

[5] Ni and/or Ni-Cu alloys supported over SiO2 catalysts synthesized via phyllosilicate structures for steam reforming of biomass tar reaction [J].

Ashok, J. ;

Kathiraser, Y. ;

Ang, M. L. ;

Kawi, S. .

CATALYSIS SCIENCE & TECHNOLOGY, 2015, 5 (09) :4398-4409

[6] Bi-functional hydrotalcite-derived NiO-CaO-Al2O3 catalysts for steam reforming of biomass and/or tar model compound at low steam-to-carbon conditions [J].

Ashok, J. ;

Kathiraser, Y. ;

Ang, M. L. ;

Kawi, S. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2015, 172 :116-128

[7] Nickel-Iron Alloy Supported over Iron-Alumina Catalysts for Steam Reforming of Biomass Tar Model Compound [J].

Ashok, J. ;

Kawi, S. .

ACS CATALYSIS, 2014, 4 (01) :289-301

[8] RHODIUM CARBON-MONOXIDE SURFACE-CHEMISTRY - THE INVOLVEMENT OF SURFACE HYDROXYL-GROUPS ON AL2O3 AND SIO2 SUPPORTS [J].

BASU, P ;

PANAYOTOV, D ;

YATES, JT .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1988, 110 (07) :2074-2081

[9] A highly active and stable Ni-Mg phyllosilicate nanotubular catalyst for ultrahigh temperature water-gas shift reaction [J].

Bian, Zhoufeng ;

Li, Ziwei ;

Ashok, Jangam ;

Kawi, Sibudjing .

CHEMICAL COMMUNICATIONS, 2015, 51 (91) :16324-16326

[10] STRUCTURAL SENSITIVITY OF CO ADSORPTION AND H-2/CO COADSORPTION ON NI/SIO2 CATALYSTS [J].

BLACKMOND, DG ;

KO, EI .

JOURNAL OF CATALYSIS, 1985, 96 (01) :210-221

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