A new preparation method of Au/ferric oxide catalyst for low temperature CO oxidation

Shinji Kudo, Taisuke Maki, Masahiro Yamada, Kazuhiro Mae

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A new preparation method of Au/α-Fe2O3 catalyst for CO oxidation reaction was proposed in this paper. The method includes only a simple modification of the conventional coprecipitation method, adding HAuCl4 solution after the growth of iron hydroxide grain to a certain size, but significantly influenced the catalytic activity in the reaction. In the characterization study, XRD (X-ray diffractometer) analysis, TEM (transmission electron microscope) observation, and N2 adsorption measurement showed similar results among the samples calcined at the same temperature, but the effect of the preparation method appeared in the CO adsorption measurement among the samples calcined at 200 °C. Catalysts having high CO adsorption ability also performed well in CO oxidation tests. The CO adsorption and oxidation studies indicated that the proposed preparation method results in stable and effective loading of Au, compared to the conventional coprecipitation method. In the CO oxidation test, the catalyst prepared by the proposed mixing scheme achieved complete CO conversion for more than 3000 h at 25 °C, space velocity 100,000 h-1, and 500 ppm CO. The selectivity for the CO oxidation was confirmed using reformed gas containing excess H2. In addition, the NO reduction reaction was favored over CO oxidation by the catalyst. Thus, we were able to load Au on the α-Fe2O3 effectively and demonstrate its potential as an environmental catalyst.

Original languageEnglish
Pages (from-to)214-219
Number of pages6
JournalChemical Engineering Science
Volume65
Issue number1
DOIs
Publication statusPublished - Jan 1 2010
Externally publishedYes

Fingerprint

Carbon Monoxide
Oxidation
Catalysts
Oxides
Adsorption
Coprecipitation
Temperature
Diffractometers
ferric oxide
Catalyst activity
Electron microscopes
Iron
X rays
Gases

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

A new preparation method of Au/ferric oxide catalyst for low temperature CO oxidation. / Kudo, Shinji; Maki, Taisuke; Yamada, Masahiro; Mae, Kazuhiro.

In: Chemical Engineering Science, Vol. 65, No. 1, 01.01.2010, p. 214-219.

Research output: Contribution to journalArticle

Kudo, Shinji ; Maki, Taisuke ; Yamada, Masahiro ; Mae, Kazuhiro. / A new preparation method of Au/ferric oxide catalyst for low temperature CO oxidation. In: Chemical Engineering Science. 2010 ; Vol. 65, No. 1. pp. 214-219.
@article{6f1b27b10d594e84a0ef6eb852ad9252,
title = "A new preparation method of Au/ferric oxide catalyst for low temperature CO oxidation",
abstract = "A new preparation method of Au/α-Fe2O3 catalyst for CO oxidation reaction was proposed in this paper. The method includes only a simple modification of the conventional coprecipitation method, adding HAuCl4 solution after the growth of iron hydroxide grain to a certain size, but significantly influenced the catalytic activity in the reaction. In the characterization study, XRD (X-ray diffractometer) analysis, TEM (transmission electron microscope) observation, and N2 adsorption measurement showed similar results among the samples calcined at the same temperature, but the effect of the preparation method appeared in the CO adsorption measurement among the samples calcined at 200 °C. Catalysts having high CO adsorption ability also performed well in CO oxidation tests. The CO adsorption and oxidation studies indicated that the proposed preparation method results in stable and effective loading of Au, compared to the conventional coprecipitation method. In the CO oxidation test, the catalyst prepared by the proposed mixing scheme achieved complete CO conversion for more than 3000 h at 25 °C, space velocity 100,000 h-1, and 500 ppm CO. The selectivity for the CO oxidation was confirmed using reformed gas containing excess H2. In addition, the NO reduction reaction was favored over CO oxidation by the catalyst. Thus, we were able to load Au on the α-Fe2O3 effectively and demonstrate its potential as an environmental catalyst.",
author = "Shinji Kudo and Taisuke Maki and Masahiro Yamada and Kazuhiro Mae",
year = "2010",
month = "1",
day = "1",
doi = "10.1016/j.ces.2009.05.044",
language = "English",
volume = "65",
pages = "214--219",
journal = "Chemical Engineering Science",
issn = "0009-2509",
publisher = "Elsevier BV",
number = "1",

}

TY - JOUR

T1 - A new preparation method of Au/ferric oxide catalyst for low temperature CO oxidation

AU - Kudo, Shinji

AU - Maki, Taisuke

AU - Yamada, Masahiro

AU - Mae, Kazuhiro

PY - 2010/1/1

Y1 - 2010/1/1

N2 - A new preparation method of Au/α-Fe2O3 catalyst for CO oxidation reaction was proposed in this paper. The method includes only a simple modification of the conventional coprecipitation method, adding HAuCl4 solution after the growth of iron hydroxide grain to a certain size, but significantly influenced the catalytic activity in the reaction. In the characterization study, XRD (X-ray diffractometer) analysis, TEM (transmission electron microscope) observation, and N2 adsorption measurement showed similar results among the samples calcined at the same temperature, but the effect of the preparation method appeared in the CO adsorption measurement among the samples calcined at 200 °C. Catalysts having high CO adsorption ability also performed well in CO oxidation tests. The CO adsorption and oxidation studies indicated that the proposed preparation method results in stable and effective loading of Au, compared to the conventional coprecipitation method. In the CO oxidation test, the catalyst prepared by the proposed mixing scheme achieved complete CO conversion for more than 3000 h at 25 °C, space velocity 100,000 h-1, and 500 ppm CO. The selectivity for the CO oxidation was confirmed using reformed gas containing excess H2. In addition, the NO reduction reaction was favored over CO oxidation by the catalyst. Thus, we were able to load Au on the α-Fe2O3 effectively and demonstrate its potential as an environmental catalyst.

AB - A new preparation method of Au/α-Fe2O3 catalyst for CO oxidation reaction was proposed in this paper. The method includes only a simple modification of the conventional coprecipitation method, adding HAuCl4 solution after the growth of iron hydroxide grain to a certain size, but significantly influenced the catalytic activity in the reaction. In the characterization study, XRD (X-ray diffractometer) analysis, TEM (transmission electron microscope) observation, and N2 adsorption measurement showed similar results among the samples calcined at the same temperature, but the effect of the preparation method appeared in the CO adsorption measurement among the samples calcined at 200 °C. Catalysts having high CO adsorption ability also performed well in CO oxidation tests. The CO adsorption and oxidation studies indicated that the proposed preparation method results in stable and effective loading of Au, compared to the conventional coprecipitation method. In the CO oxidation test, the catalyst prepared by the proposed mixing scheme achieved complete CO conversion for more than 3000 h at 25 °C, space velocity 100,000 h-1, and 500 ppm CO. The selectivity for the CO oxidation was confirmed using reformed gas containing excess H2. In addition, the NO reduction reaction was favored over CO oxidation by the catalyst. Thus, we were able to load Au on the α-Fe2O3 effectively and demonstrate its potential as an environmental catalyst.

UR - http://www.scopus.com/inward/record.url?scp=71849096344&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=71849096344&partnerID=8YFLogxK

U2 - 10.1016/j.ces.2009.05.044

DO - 10.1016/j.ces.2009.05.044

M3 - Article

VL - 65

SP - 214

EP - 219

JO - Chemical Engineering Science

JF - Chemical Engineering Science

SN - 0009-2509

IS - 1

ER -