CO oxidation over gold nanocatalyst confined in mesoporous silica

Yu Shan Chi; Hong Ping Lin; Chung Yuan Mou

doi:10.1016/j.apcata.2005.01.034

CO oxidation over gold nanocatalyst confined in mesoporous silica

Yu Shan Chi, Hong Ping Lin, Chung Yuan Mou

Research output: Contribution to journal › Article › peer-review

148 Citations (Scopus)

Abstract

Au nanoparticles embedded within mesoporous silica particles have been prepared and used as catalysts for CO oxidation. The silane APTS (H₂N(CH₂)₃-Si(OMe)₃) was used to surface-functionalize mesoporous silica in a direct method. The functionalized mesoporous silica was used to absorb the gold precursor AuCl₄^- and gold nanoparticles were formed inside the nanochannels after chemical reduction. The catalysts were activated by calcinations, followed with hydrogen reduction at 600 °C. MCM-41, MCM-48 and SBA-15 were used as the supports to prepare Au nanoparticles, resulting in different particle sizes of Au. The catalysts are active in the oxidation of carbon monoxide, reaching activity values as high as 7.0 × 10^-3 mmol g_cat^-1 S^-1 at 353 K. The conversion of CO increases with decreasing size of gold nanoparticles.

Original language	English
Pages (from-to)	199-206
Number of pages	8
Journal	Applied Catalysis A: General
Volume	284
Issue number	1-2
DOIs	https://doi.org/10.1016/j.apcata.2005.01.034
Publication status	Published - Apr 28 2005
Externally published	Yes

Keywords

Gold
Heterogeneous catalysis
Mesoporous silica
Nanotechnology
Oxidation

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

Access to Document

10.1016/j.apcata.2005.01.034

Cite this

@article{947057b6058c48d4b42ed7bc21f5784c,

title = "CO oxidation over gold nanocatalyst confined in mesoporous silica",

abstract = "Au nanoparticles embedded within mesoporous silica particles have been prepared and used as catalysts for CO oxidation. The silane APTS (H2N(CH2)3-Si(OMe)3) was used to surface-functionalize mesoporous silica in a direct method. The functionalized mesoporous silica was used to absorb the gold precursor AuCl4- and gold nanoparticles were formed inside the nanochannels after chemical reduction. The catalysts were activated by calcinations, followed with hydrogen reduction at 600 °C. MCM-41, MCM-48 and SBA-15 were used as the supports to prepare Au nanoparticles, resulting in different particle sizes of Au. The catalysts are active in the oxidation of carbon monoxide, reaching activity values as high as 7.0 × 10-3 mmol gcat-1 S-1 at 353 K. The conversion of CO increases with decreasing size of gold nanoparticles.",

keywords = "Gold, Heterogeneous catalysis, Mesoporous silica, Nanotechnology, Oxidation",

author = "Chi, {Yu Shan} and Lin, {Hong Ping} and Mou, {Chung Yuan}",

note = "Funding Information: This work was supported from the Program of Academic Excellence sponsored by the Ministry of Education, Taiwan. Prof. B.Z. Wan and Dr. A.Q. Wang have been helpful in discussions of this work. J.H. Wang is thanked for his help in making the XPS measurement.",

year = "2005",

month = apr,

day = "28",

doi = "10.1016/j.apcata.2005.01.034",

language = "English",

volume = "284",

pages = "199--206",

journal = "Applied Catalysis A: General",

issn = "0926-860X",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - CO oxidation over gold nanocatalyst confined in mesoporous silica

AU - Chi, Yu Shan

AU - Lin, Hong Ping

AU - Mou, Chung Yuan

N1 - Funding Information: This work was supported from the Program of Academic Excellence sponsored by the Ministry of Education, Taiwan. Prof. B.Z. Wan and Dr. A.Q. Wang have been helpful in discussions of this work. J.H. Wang is thanked for his help in making the XPS measurement.

PY - 2005/4/28

Y1 - 2005/4/28

N2 - Au nanoparticles embedded within mesoporous silica particles have been prepared and used as catalysts for CO oxidation. The silane APTS (H2N(CH2)3-Si(OMe)3) was used to surface-functionalize mesoporous silica in a direct method. The functionalized mesoporous silica was used to absorb the gold precursor AuCl4- and gold nanoparticles were formed inside the nanochannels after chemical reduction. The catalysts were activated by calcinations, followed with hydrogen reduction at 600 °C. MCM-41, MCM-48 and SBA-15 were used as the supports to prepare Au nanoparticles, resulting in different particle sizes of Au. The catalysts are active in the oxidation of carbon monoxide, reaching activity values as high as 7.0 × 10-3 mmol gcat-1 S-1 at 353 K. The conversion of CO increases with decreasing size of gold nanoparticles.

AB - Au nanoparticles embedded within mesoporous silica particles have been prepared and used as catalysts for CO oxidation. The silane APTS (H2N(CH2)3-Si(OMe)3) was used to surface-functionalize mesoporous silica in a direct method. The functionalized mesoporous silica was used to absorb the gold precursor AuCl4- and gold nanoparticles were formed inside the nanochannels after chemical reduction. The catalysts were activated by calcinations, followed with hydrogen reduction at 600 °C. MCM-41, MCM-48 and SBA-15 were used as the supports to prepare Au nanoparticles, resulting in different particle sizes of Au. The catalysts are active in the oxidation of carbon monoxide, reaching activity values as high as 7.0 × 10-3 mmol gcat-1 S-1 at 353 K. The conversion of CO increases with decreasing size of gold nanoparticles.

KW - Gold

KW - Heterogeneous catalysis

KW - Mesoporous silica

KW - Nanotechnology

KW - Oxidation

UR - http://www.scopus.com/inward/record.url?scp=15744374545&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=15744374545&partnerID=8YFLogxK

U2 - 10.1016/j.apcata.2005.01.034

DO - 10.1016/j.apcata.2005.01.034

M3 - Article

AN - SCOPUS:15744374545

SN - 0926-860X

VL - 284

SP - 199

EP - 206

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

IS - 1-2

ER -

CO oxidation over gold nanocatalyst confined in mesoporous silica

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this