Automated electrochemical synthesis and characterization of TiO2 supported Au nanoparticle electrocatalysts

Baeck, Sung-Hyeon, Jaramillo, Thomas F., Kleiman-Shwarsctein, Alan and McFarland, Eric W. (2005) Automated electrochemical synthesis and characterization of TiO2 supported Au nanoparticle electrocatalysts. Measurement Science and Technology, 16 1: 54-59. doi:10.1088/0957-0233/16/1/008


Author Baeck, Sung-Hyeon
Jaramillo, Thomas F.
Kleiman-Shwarsctein, Alan
McFarland, Eric W.
Title Automated electrochemical synthesis and characterization of TiO2 supported Au nanoparticle electrocatalysts
Formatted title
Automated electrochemical synthesis and characterization of TiO2 supported Au nanoparticle electrocatalysts
Journal name Measurement Science and Technology   Check publisher's open access policy
ISSN 0957-0233
1361-6501
Publication date 2005
Year available 2004
Sub-type Article (original research)
DOI 10.1088/0957-0233/16/1/008
Open Access Status Not yet assessed
Volume 16
Issue 1
Start page 54
End page 59
Total pages 6
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Language eng
Formatted abstract
Automated systems for electrochemical synthesis and high throughput screening of catalytic materials were developed and used to prepare a library of nanoparticulate gold supported on TiO2. A two-dimensional array (library) of Au was synthesized by pulsed cathodic electrodeposition onto a thermally oxidized titanium dioxide substrate. Variations in particle size across the library were created by changing the deposition time (number of pulses). Longer deposition times led to increased Au particle sizes and greater density of Au on the surface. High throughput electrochemical screening was used to characterize the electrocatalytic activity of the supported Au clusters for: (1) photoelectrochemical water oxidation and (2) CO electro-oxidation. Au films synthesized with 5 ms pulses between 3 and 10 s of total deposition time demonstrated the greatest activity for photodecomposition of water (20-40% greater than pure TiO2). For CO electro-oxidation, it was found that the smallest Au particle (< 10 nm, 1 s total deposition time) was most active, consistent with previous research in this area.
Keyword Au/TiO 2
Combinatorial chemistry
Nanoparticles
Pulsed electrodeposition
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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