Discussing the use of modified ceria as support for Pt catalysts on water–gas shift reaction

Farias, Andréa M. Duarte de; Nguyen-Thanh, Danh; Fraga, Marco A.

doi:10.1016/j.apcatb.2009.09.036

Cited by 87 publications

(37 citation statements)

References 43 publications

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“…Oxygen transfer was easier in ceria-zirconia solid solution; thus bulk oxygen could be reduced with surface oxygen simultaneously in ceria-zirconia solid solution [16]. A weak reduction peak of Pt@Ce 0.67 Zr 0.33 O 2 around 1100 K was appeared, which was also observed for the impregnated Pt/Ce 0.67 Zr 0.33 O 2 catalyst [17].…”

Section: Catalyst Activity Testsupporting

confidence: 49%

Platinum based core–shell catalysts for sour water–gas shift reaction

Liu

Zhang

2012

Catalysis Communications

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Section: Catalyst Activity Testsupporting

confidence: 49%

Platinum based core–shell catalysts for sour water–gas shift reaction

Liu

Zhang

2012

Catalysis Communications

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“…Gonzaleza et al (2010) studied the effect of Pt catalysts supported on TiO 2 , CeO 2 and Ce-TiO 2 and found the Pt supported on Ce-modified TiO 2 support exhibiting better activity than those corresponding to individual ceria and titania supported catalysts. Most of the recent studies have been directed in using any of the precious metals like Pt, Rh, Pd and Au deposited on Ceria, Zirconia, Alumina, Titania, Thoria or Magnesia supports [Andrea et al, 2010]. Latest research works have started using mixed oxides of the above supports with the precious metals dispersed in them to effect the low temperature water gas shift reaction.…”

Section: Noble Metal Catalystsmentioning

confidence: 99%

A Review of the Water Gas Shift Reaction Kinetics

J¹,

Loganathan²,

Shantha³

2010

International Journal of Chemical Reactor Engineering

204

154

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The world's progression towards the Hydrogen economy is facilitating the production of hydrogen from various resources. In the carbon based hydrogen production, Water gas shift reaction is the intermediate step used for hydrogen enrichment and CO reduction in the synthesis gas. This paper makes a critical review of the developments in the modeling approaches of the reaction for use in designing and simulating the water gas shift reactor. Considering the fact that the rate of the reaction is dependent on various parameters including the composition of the catalyst, the active surface and structure of the catalyst, the size of the catalyst, age of the catalyst, its operating temperature and pressure and the composition of the gases, it is difficult to narrow down the expression for the shift reaction. With different authors conducting experiments still to validate the kinetic expressions for the shift reaction, continuous research on different composition and new catalysts are also reported periodically. Moreover the commercial catalyst manufacturers seldom provide information on the catalyst. This makes the task of designers difficult to model the shift reaction. This review provides a consolidated listing of the various important kinetic expressions published for both the high temperature and the low temperature water gas shift reaction along with the details of the catalysts and the operating conditions at which they have been validated.

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“…Furthermore, a synergistic effect is obtained between metal and ceria. On one hand, ceria reducibility is favoured when the metal is in close contact with its surface and, on the other hand, ceria can stabilize the metal nanoparticles avoiding their agglomeration [6]. However, given the low availability of ceria, it is interesting to optimize its use, for example by spreading it onto a high surface area support.…”

Section: Introductionmentioning

confidence: 99%

Promoter effect of sodium in graphene-supported Ni and Ni–CeO2 catalyst for the low-temperature WGS reaction

Dongil

Pastor‐Pérez

Sepúlveda-Escribano

et al. 2015

Applied Catalysis A: General

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Graphical abstract Highlights-Graphene-supported Ni and Ni-CeO 2 catalysts have been studied.-Metal dispersion depends on the presence of ceria and on the precipitating agent, NaOH or urea.-The graphene support strongly interacts with the ceria promoter.-The presence of sodium increases the catalytic activity, mainly in the presence of ceria. AbstractThe low temperature water-gas shift (WGS) reaction has been studied over NiCeO 2 /Graphene and Ni/Graphene. The catalysts were prepared with 5 wt% Ni and 20 wt% CeO 2 loadings, by deposition-precipitation employing sodium hydroxide and urea as precipitating agents. The materials were characterized by TEM, powder X-ray diffraction, Raman spectroscopy, H 2 -temperature-programmed reduction and X-ray photoelectron spectroscopy (XPS). The characterization and the reaction results indicated that the interaction between the active species and the support is higher than with activated carbon, and this hinders the reducibility of ceria and thus the catalytic performance. On the other hand, the presence of residual sodium in samples prepared by precipitation with NaOH facilitated the reduction of ceria. The catalytic activity was highly improved in the presence of sodium, what can be explained on the basis of an associative reaction mechanism which is favored over Ni-O-Na entities.

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Discussing the use of modified ceria as support for Pt catalysts on water–gas shift reaction

Cited by 87 publications

References 43 publications

Platinum based core–shell catalysts for sour water–gas shift reaction

Platinum based core–shell catalysts for sour water–gas shift reaction

A Review of the Water Gas Shift Reaction Kinetics

Promoter effect of sodium in graphene-supported Ni and Ni–CeO2 catalyst for the low-temperature WGS reaction

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