Abstract
Carbon nanotube (CNT)-supported Pt metal nanoparticles were covered with silica layers by hydrolysis of 3-aminopropyl-triethoxysilane (APTES) and/or tetraethoxysilane (TEOS). The hydrolysis of only APTES resulted in a uniform coverage of silica layers on Pt/CNT, but the thickness of the silica layers was very thin (<1 nm). Pt/CNT could also be coated with silica layers of a few nanometers in thickness by hydrolysis of TEOS, but exposed surfaces of CNTs in the sample were frequently observed. In contrast, the successive hydrolysis of APTES and TEOS brought about a uniform coverage of silica layers of a few nanometers in thickness on Pt/CNT. The silica-coated Pt/CNT showed high catalytic activity for electrochemical reactions in aqueous H2SO 4 electrolyte, in spite of a uniform coverage of Pt metal with silica layers. In addition, the coverage of Pt/CNT with silica layers improved its durability in electrochemical reactions.
| Original language | English |
|---|---|
| Pages (from-to) | 731-738 |
| Number of pages | 8 |
| Journal | Topics in Catalysis |
| Volume | 52 |
| Issue number | 6-7 |
| DOIs | |
| Publication status | Published - Jun 1 2009 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Chemistry(all)
Cite this
Preparation of carbon nanotube-supported Pt metal particles covered with silica layers and their application to electrocatalysts for PEMFC. / Takenaka, Sakae; Matsumori, Hiroshi; Arike, Takafumi; Matsune, Hideki; Kishida, Masahiro.
In: Topics in Catalysis, Vol. 52, No. 6-7, 01.06.2009, p. 731-738.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Preparation of carbon nanotube-supported Pt metal particles covered with silica layers and their application to electrocatalysts for PEMFC
AU - Takenaka, Sakae
AU - Matsumori, Hiroshi
AU - Arike, Takafumi
AU - Matsune, Hideki
AU - Kishida, Masahiro
PY - 2009/6/1
Y1 - 2009/6/1
N2 - Carbon nanotube (CNT)-supported Pt metal nanoparticles were covered with silica layers by hydrolysis of 3-aminopropyl-triethoxysilane (APTES) and/or tetraethoxysilane (TEOS). The hydrolysis of only APTES resulted in a uniform coverage of silica layers on Pt/CNT, but the thickness of the silica layers was very thin (<1 nm). Pt/CNT could also be coated with silica layers of a few nanometers in thickness by hydrolysis of TEOS, but exposed surfaces of CNTs in the sample were frequently observed. In contrast, the successive hydrolysis of APTES and TEOS brought about a uniform coverage of silica layers of a few nanometers in thickness on Pt/CNT. The silica-coated Pt/CNT showed high catalytic activity for electrochemical reactions in aqueous H2SO 4 electrolyte, in spite of a uniform coverage of Pt metal with silica layers. In addition, the coverage of Pt/CNT with silica layers improved its durability in electrochemical reactions.
AB - Carbon nanotube (CNT)-supported Pt metal nanoparticles were covered with silica layers by hydrolysis of 3-aminopropyl-triethoxysilane (APTES) and/or tetraethoxysilane (TEOS). The hydrolysis of only APTES resulted in a uniform coverage of silica layers on Pt/CNT, but the thickness of the silica layers was very thin (<1 nm). Pt/CNT could also be coated with silica layers of a few nanometers in thickness by hydrolysis of TEOS, but exposed surfaces of CNTs in the sample were frequently observed. In contrast, the successive hydrolysis of APTES and TEOS brought about a uniform coverage of silica layers of a few nanometers in thickness on Pt/CNT. The silica-coated Pt/CNT showed high catalytic activity for electrochemical reactions in aqueous H2SO 4 electrolyte, in spite of a uniform coverage of Pt metal with silica layers. In addition, the coverage of Pt/CNT with silica layers improved its durability in electrochemical reactions.
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U2 - 10.1007/s11244-009-9207-3
DO - 10.1007/s11244-009-9207-3
M3 - Article
VL - 52
SP - 731
EP - 738
JO - Topics in Catalysis
JF - Topics in Catalysis
SN - 1022-5528
IS - 6-7
ER -