Development of active, and stable water-gas-shift reaction catalysts for fuel cell applications

K.G.H. Azzam; Igor V. Babich; Kulathu Iyer Seshan; Leon Lefferts

Abstract

Water-gas-shift (WGS) reaction CO + H₂O = CO₂ + H₂, is a key step in the generation of H₂ for fuel cells. Noble metal-based catalysts are promising single stage WGS catalysts because they less sensitive than LTS catalysts (Cu based) and more active than the HTS (Ni) catalysts. High activity in CO conversion at moderate temperatures and stability during start-up - shutdown cycles is essential, especially in transport applications. A series of supported Pt catalysts was studied. Zirconia based catalysts were stable but catalyst activity was low. Pt/TiO₂ and Pt/Ti_0.5Ce_0.5O₂ gave the required commercial activity (8.10-5 mole H₂ g-1cat/sec, based on a 2 kg catalyst for a 100 kw fuel cell) at 300°C. However, 35 % of initial activity was lost after 24 hr. A new promising catalyst developed has high activity as Pt/TiO₂ and was very stable. The reasons for the different activities, deactivation mechanism, and the stability of the newly developed catalysts were discussed. This is an abstract of a paper presented at the 231st ACS National Meeting (Atlanta, GA 3/26-30/2006).

Original language	English
Number of pages	1
Journal	Abstracts of papers of the American Chemical Society
Volume	231
Publication status	Published - 2006
Event	231th ACS National Meeting 2006: Spring 2006 - Atlanta, United States Duration: 26 Mar 2006 → 30 Mar 2006 Conference number: 231

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@article{39916351bdcf4d91ade9fa3ebf5dc7c2,

title = "Development of active, and stable water-gas-shift reaction catalysts for fuel cell applications",

abstract = "Water-gas-shift (WGS) reaction CO + H2O = CO2 + H2, is a key step in the generation of H2 for fuel cells. Noble metal-based catalysts are promising single stage WGS catalysts because they less sensitive than LTS catalysts (Cu based) and more active than the HTS (Ni) catalysts. High activity in CO conversion at moderate temperatures and stability during start-up - shutdown cycles is essential, especially in transport applications. A series of supported Pt catalysts was studied. Zirconia based catalysts were stable but catalyst activity was low. Pt/TiO2 and Pt/Ti0.5Ce0.5O2 gave the required commercial activity (8.10-5 mole H2 g-1cat/sec, based on a 2 kg catalyst for a 100 kw fuel cell) at 300°C. However, 35 % of initial activity was lost after 24 hr. A new promising catalyst developed has high activity as Pt/TiO2 and was very stable. The reasons for the different activities, deactivation mechanism, and the stability of the newly developed catalysts were discussed. This is an abstract of a paper presented at the 231st ACS National Meeting (Atlanta, GA 3/26-30/2006).",

author = "K.G.H. Azzam and Babich, {Igor V.} and Seshan, {Kulathu Iyer} and Leon Lefferts",

year = "2006",

language = "English",

volume = "231",

journal = "Abstracts of papers of the American Chemical Society",

issn = "0065-7727",

publisher = "American Chemical Society",

note = "231th ACS National Meeting 2006 : Spring 2006 ; Conference date: 26-03-2006 Through 30-03-2006",

}

TY - JOUR

T1 - Development of active, and stable water-gas-shift reaction catalysts for fuel cell applications

AU - Azzam, K.G.H.

AU - Babich, Igor V.

AU - Seshan, Kulathu Iyer

AU - Lefferts, Leon

N1 - Conference code: 231

PY - 2006

Y1 - 2006

N2 - Water-gas-shift (WGS) reaction CO + H2O = CO2 + H2, is a key step in the generation of H2 for fuel cells. Noble metal-based catalysts are promising single stage WGS catalysts because they less sensitive than LTS catalysts (Cu based) and more active than the HTS (Ni) catalysts. High activity in CO conversion at moderate temperatures and stability during start-up - shutdown cycles is essential, especially in transport applications. A series of supported Pt catalysts was studied. Zirconia based catalysts were stable but catalyst activity was low. Pt/TiO2 and Pt/Ti0.5Ce0.5O2 gave the required commercial activity (8.10-5 mole H2 g-1cat/sec, based on a 2 kg catalyst for a 100 kw fuel cell) at 300°C. However, 35 % of initial activity was lost after 24 hr. A new promising catalyst developed has high activity as Pt/TiO2 and was very stable. The reasons for the different activities, deactivation mechanism, and the stability of the newly developed catalysts were discussed. This is an abstract of a paper presented at the 231st ACS National Meeting (Atlanta, GA 3/26-30/2006).

AB - Water-gas-shift (WGS) reaction CO + H2O = CO2 + H2, is a key step in the generation of H2 for fuel cells. Noble metal-based catalysts are promising single stage WGS catalysts because they less sensitive than LTS catalysts (Cu based) and more active than the HTS (Ni) catalysts. High activity in CO conversion at moderate temperatures and stability during start-up - shutdown cycles is essential, especially in transport applications. A series of supported Pt catalysts was studied. Zirconia based catalysts were stable but catalyst activity was low. Pt/TiO2 and Pt/Ti0.5Ce0.5O2 gave the required commercial activity (8.10-5 mole H2 g-1cat/sec, based on a 2 kg catalyst for a 100 kw fuel cell) at 300°C. However, 35 % of initial activity was lost after 24 hr. A new promising catalyst developed has high activity as Pt/TiO2 and was very stable. The reasons for the different activities, deactivation mechanism, and the stability of the newly developed catalysts were discussed. This is an abstract of a paper presented at the 231st ACS National Meeting (Atlanta, GA 3/26-30/2006).

UR - http://www.scopus.com/inward/record.url?scp=33745247405&partnerID=8YFLogxK

M3 - Meeting Abstract

AN - SCOPUS:33745247405

SN - 0065-7727

VL - 231

JO - Abstracts of papers of the American Chemical Society

JF - Abstracts of papers of the American Chemical Society

T2 - 231th ACS National Meeting 2006

Y2 - 26 March 2006 through 30 March 2006

ER -

Development of active, and stable water-gas-shift reaction catalysts for fuel cell applications

Abstract

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