On-paper synthesis of Au nanocatalysts from Au(III) complex ions for low-temperature CO oxidation

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Au nanoparticles (AuNPs) were successfully synthesized in situ on a microstructured paper matrix composed of ceramic fibers as the main framework and ZnO whiskers as a preferential support for AuNPs. The paper-like ceramic fiber/ZnO whisker composites were prepared using a papermaking technique, then soaked in an aqueous solution of the Au(III) complex HAuCl4. AuNPs with size <10 nm were spontaneously formed on the ZnO whiskers in the absence of reducing agents, possibly due to electron transfer from Zn(II) in ZnO whiskers to Au(III) species through Zn-O-Au bonds. As-prepared AuNPs@ZnO whisker-containing paper (AuNPs@ZnO paper) is much like ordinary paper products in being flexible, lightweight and easy to handle. AuNPs@ZnO paper demonstrated excellent catalytic performance in low-temperature CO oxidation. Complete conversion of CO to CO2 was achieved at 20 °C, 140 K lower than the reaction temperature for conventional Au/ZnO catalyst powders. This facile technique has potentially broad wide applications in 'on-paper' synthesis of a diverse array of metal NPs. The metal NPs@ZnO paper composites with paper-like flexibility are able to fit various reactor configurations and are thus expected to be promising catalytic materials for improving the practical utility and catalytic performance of these systems, for a wide range of industrial chemical processes.

Original languageEnglish
Pages (from-to)5244-5249
Number of pages6
JournalJournal of Materials Chemistry
Volume19
Issue number29
DOIs
Publication statusPublished - Aug 7 2009

Fingerprint

Carbon Monoxide
Ions
Nanoparticles
Oxidation
Ceramic fibers
Temperature
Metals
Industrial chemicals
Paper products
Papermaking
Reducing Agents
Composite materials
Reducing agents
Powders
Catalysts
Electrons

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

On-paper synthesis of Au nanocatalysts from Au(III) complex ions for low-temperature CO oxidation. / Koga, Hirotaka; Kitaoka, Takuya; Wariishi, Hiroyuki.

In: Journal of Materials Chemistry, Vol. 19, No. 29, 07.08.2009, p. 5244-5249.

Research output: Contribution to journalArticle

@article{97656e3d68394d5eb9dc0d252e3b4df4,
title = "On-paper synthesis of Au nanocatalysts from Au(III) complex ions for low-temperature CO oxidation",
abstract = "Au nanoparticles (AuNPs) were successfully synthesized in situ on a microstructured paper matrix composed of ceramic fibers as the main framework and ZnO whiskers as a preferential support for AuNPs. The paper-like ceramic fiber/ZnO whisker composites were prepared using a papermaking technique, then soaked in an aqueous solution of the Au(III) complex HAuCl4. AuNPs with size <10 nm were spontaneously formed on the ZnO whiskers in the absence of reducing agents, possibly due to electron transfer from Zn(II) in ZnO whiskers to Au(III) species through Zn-O-Au bonds. As-prepared AuNPs@ZnO whisker-containing paper (AuNPs@ZnO paper) is much like ordinary paper products in being flexible, lightweight and easy to handle. AuNPs@ZnO paper demonstrated excellent catalytic performance in low-temperature CO oxidation. Complete conversion of CO to CO2 was achieved at 20 °C, 140 K lower than the reaction temperature for conventional Au/ZnO catalyst powders. This facile technique has potentially broad wide applications in 'on-paper' synthesis of a diverse array of metal NPs. The metal NPs@ZnO paper composites with paper-like flexibility are able to fit various reactor configurations and are thus expected to be promising catalytic materials for improving the practical utility and catalytic performance of these systems, for a wide range of industrial chemical processes.",
author = "Hirotaka Koga and Takuya Kitaoka and Hiroyuki Wariishi",
year = "2009",
month = "8",
day = "7",
doi = "10.1039/b905818d",
language = "English",
volume = "19",
pages = "5244--5249",
journal = "Journal of Materials Chemistry",
issn = "0959-9428",
publisher = "Royal Society of Chemistry",
number = "29",

}

TY - JOUR

T1 - On-paper synthesis of Au nanocatalysts from Au(III) complex ions for low-temperature CO oxidation

AU - Koga, Hirotaka

AU - Kitaoka, Takuya

AU - Wariishi, Hiroyuki

PY - 2009/8/7

Y1 - 2009/8/7

N2 - Au nanoparticles (AuNPs) were successfully synthesized in situ on a microstructured paper matrix composed of ceramic fibers as the main framework and ZnO whiskers as a preferential support for AuNPs. The paper-like ceramic fiber/ZnO whisker composites were prepared using a papermaking technique, then soaked in an aqueous solution of the Au(III) complex HAuCl4. AuNPs with size <10 nm were spontaneously formed on the ZnO whiskers in the absence of reducing agents, possibly due to electron transfer from Zn(II) in ZnO whiskers to Au(III) species through Zn-O-Au bonds. As-prepared AuNPs@ZnO whisker-containing paper (AuNPs@ZnO paper) is much like ordinary paper products in being flexible, lightweight and easy to handle. AuNPs@ZnO paper demonstrated excellent catalytic performance in low-temperature CO oxidation. Complete conversion of CO to CO2 was achieved at 20 °C, 140 K lower than the reaction temperature for conventional Au/ZnO catalyst powders. This facile technique has potentially broad wide applications in 'on-paper' synthesis of a diverse array of metal NPs. The metal NPs@ZnO paper composites with paper-like flexibility are able to fit various reactor configurations and are thus expected to be promising catalytic materials for improving the practical utility and catalytic performance of these systems, for a wide range of industrial chemical processes.

AB - Au nanoparticles (AuNPs) were successfully synthesized in situ on a microstructured paper matrix composed of ceramic fibers as the main framework and ZnO whiskers as a preferential support for AuNPs. The paper-like ceramic fiber/ZnO whisker composites were prepared using a papermaking technique, then soaked in an aqueous solution of the Au(III) complex HAuCl4. AuNPs with size <10 nm were spontaneously formed on the ZnO whiskers in the absence of reducing agents, possibly due to electron transfer from Zn(II) in ZnO whiskers to Au(III) species through Zn-O-Au bonds. As-prepared AuNPs@ZnO whisker-containing paper (AuNPs@ZnO paper) is much like ordinary paper products in being flexible, lightweight and easy to handle. AuNPs@ZnO paper demonstrated excellent catalytic performance in low-temperature CO oxidation. Complete conversion of CO to CO2 was achieved at 20 °C, 140 K lower than the reaction temperature for conventional Au/ZnO catalyst powders. This facile technique has potentially broad wide applications in 'on-paper' synthesis of a diverse array of metal NPs. The metal NPs@ZnO paper composites with paper-like flexibility are able to fit various reactor configurations and are thus expected to be promising catalytic materials for improving the practical utility and catalytic performance of these systems, for a wide range of industrial chemical processes.

UR - http://www.scopus.com/inward/record.url?scp=77952899185&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77952899185&partnerID=8YFLogxK

U2 - 10.1039/b905818d

DO - 10.1039/b905818d

M3 - Article

AN - SCOPUS:77952899185

VL - 19

SP - 5244

EP - 5249

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

SN - 0959-9428

IS - 29

ER -