Leaching studies of a highly active Cu-Pd bimetallic catalyst supported on nanostructured CeO2 for oxygen-assisted water-gas shift reaction

Elise S. Bickford, S. Velu, Chunshan Song

Research output: Contribution to journalConference article

Abstract

A new series of Cu-Pd bimetallic catalysts containing various amounts of Cu and Pd supposed on a high surface area CeO2 obtained by urea gelation method was developed for the oxgen-assisted water-gas shift reaction. The catalysts that contained 30 wt % Cu and 1 wt % Pd exhibited the best performance with a CO conversion exceeding 99 % around 210°C under extremely high (∼ 84%) H2 atmosphere. Scanning electron microscopic studies of the catalyst showed the existence of Cu-rich and CeO2-rich regions. The sample treated with HNO3 for 15 hr retained the original catalytic activity of over 99% CO conversion. On the other hand, the CO conversion dropped to ∼ 69% over the sample treated with NH4OH for the same period of time. TPR of the HNO3 treated sample exhibited a sharp reduction peak around 130°C compared to a broad peak centering around 160°C observed for the unleached sample. Small CuO clusters dispersed on CeO2 and interacting closely with PdO contributed significantly to the CO OWGS reaction. The nature of active species involved in the reaction was further investigated by XRD, XPS, and SEM characterizations of the leached as well as unleached samples. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA, 8/22-26/2004).

Original languageEnglish (US)
JournalACS National Meeting Book of Abstracts
Volume228
Issue number1
StatePublished - Oct 20 2004
EventAbstracts of Papers - 228th ACS National Meeting - Philadelphia, PA, United States
Duration: Aug 22 2004Aug 26 2004

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Water gas shift
Carbon Monoxide
Catalyst supports
Leaching
Oxygen
Catalysts
Gelation
Urea
Catalyst activity
X ray photoelectron spectroscopy
Scanning
Scanning electron microscopy
Electrons

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

@article{d80135ba7e5248c18a4ff3677f2a54f0,
title = "Leaching studies of a highly active Cu-Pd bimetallic catalyst supported on nanostructured CeO2 for oxygen-assisted water-gas shift reaction",
abstract = "A new series of Cu-Pd bimetallic catalysts containing various amounts of Cu and Pd supposed on a high surface area CeO2 obtained by urea gelation method was developed for the oxgen-assisted water-gas shift reaction. The catalysts that contained 30 wt {\%} Cu and 1 wt {\%} Pd exhibited the best performance with a CO conversion exceeding 99 {\%} around 210°C under extremely high (∼ 84{\%}) H2 atmosphere. Scanning electron microscopic studies of the catalyst showed the existence of Cu-rich and CeO2-rich regions. The sample treated with HNO3 for 15 hr retained the original catalytic activity of over 99{\%} CO conversion. On the other hand, the CO conversion dropped to ∼ 69{\%} over the sample treated with NH4OH for the same period of time. TPR of the HNO3 treated sample exhibited a sharp reduction peak around 130°C compared to a broad peak centering around 160°C observed for the unleached sample. Small CuO clusters dispersed on CeO2 and interacting closely with PdO contributed significantly to the CO OWGS reaction. The nature of active species involved in the reaction was further investigated by XRD, XPS, and SEM characterizations of the leached as well as unleached samples. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA, 8/22-26/2004).",
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Leaching studies of a highly active Cu-Pd bimetallic catalyst supported on nanostructured CeO2 for oxygen-assisted water-gas shift reaction. / Bickford, Elise S.; Velu, S.; Song, Chunshan.

In: ACS National Meeting Book of Abstracts, Vol. 228, No. 1, 20.10.2004.

Research output: Contribution to journalConference article

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T1 - Leaching studies of a highly active Cu-Pd bimetallic catalyst supported on nanostructured CeO2 for oxygen-assisted water-gas shift reaction

AU - Bickford, Elise S.

AU - Velu, S.

AU - Song, Chunshan

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Y1 - 2004/10/20

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AB - A new series of Cu-Pd bimetallic catalysts containing various amounts of Cu and Pd supposed on a high surface area CeO2 obtained by urea gelation method was developed for the oxgen-assisted water-gas shift reaction. The catalysts that contained 30 wt % Cu and 1 wt % Pd exhibited the best performance with a CO conversion exceeding 99 % around 210°C under extremely high (∼ 84%) H2 atmosphere. Scanning electron microscopic studies of the catalyst showed the existence of Cu-rich and CeO2-rich regions. The sample treated with HNO3 for 15 hr retained the original catalytic activity of over 99% CO conversion. On the other hand, the CO conversion dropped to ∼ 69% over the sample treated with NH4OH for the same period of time. TPR of the HNO3 treated sample exhibited a sharp reduction peak around 130°C compared to a broad peak centering around 160°C observed for the unleached sample. Small CuO clusters dispersed on CeO2 and interacting closely with PdO contributed significantly to the CO OWGS reaction. The nature of active species involved in the reaction was further investigated by XRD, XPS, and SEM characterizations of the leached as well as unleached samples. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA, 8/22-26/2004).

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