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Time-resolved detection and analysis of single nanoparticle electrocatalytic impacts
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Kang, Minkyung, Perry, David, Kim, Yang-Rae, Colburn, Alex W., Lazenby, Robert A. and Unwin, Patrick R. (2015) Time-resolved detection and analysis of single nanoparticle electrocatalytic impacts. Journal of the American Chemical Society, 137 (34). pp. 10902-10905. doi:10.1021/jacs.5b05856 ISSN 0002-7863.
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WRAP_Minkyung_NP Paper-revised-final_August11.pdf - Accepted Version - Requires a PDF viewer. Download (590Kb) | Preview |
Official URL: http://dx.doi.org/10.1021/jacs.5b05856
Abstract
There is considerable interest in understanding the interaction and activity of single entities, such as (electro)catalytic nanoparticles (NPs), with (electrode) surfaces. Through the use of a high bandwidth, high signal/noise measurement system, NP impacts on an electrode surface are detected and analyzed in unprecedented detail, revealing considerable new mechanistic information on the process. Taking the electrocatalytic oxidation of H2O2 at ruthenium oxide (RuOx) NPs as an example, the rise time of current–time transients for NP impacts is consistent with a hydrodynamic trapping model for the arrival of a NP with a distance-dependent NP diffusion-coefficient. NP release from the electrode appears to be aided by propulsion from the electrocatalytic reaction at the NP. High-frequency NP impacts, orders of magnitude larger than can be accounted for by a single pass diffusive flux of NPs, are observed that indicate the repetitive trapping and release of an individual NP that has not been previously recognized. The experiments and models described could readily be applied to other systems and serve as a powerful platform for detailed analysis of NP impacts.
Item Type: | Journal Article | ||||||||||
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Subjects: | Q Science > QD Chemistry | ||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||||
Library of Congress Subject Headings (LCSH): | Nanochemistry, Nanoparticles -- Analysis | ||||||||||
Journal or Publication Title: | Journal of the American Chemical Society | ||||||||||
Publisher: | American Chemical Society | ||||||||||
ISSN: | 0002-7863 | ||||||||||
Official Date: | 2 September 2015 | ||||||||||
Dates: |
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Volume: | 137 | ||||||||||
Number: | 34 | ||||||||||
Number of Pages: | 4 | ||||||||||
Page Range: | pp. 10902-10905 | ||||||||||
DOI: | 10.1021/jacs.5b05856 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Date of first compliant deposit: | 31 December 2015 | ||||||||||
Date of first compliant Open Access: | 28 July 2016 | ||||||||||
Funder: | European Research Council (ERC), University of Warwick Vice Chancellor Scholarship, National Research Foundation of Korea (NRF), Engineering and Physical Sciences Research Council (EPSRC) | ||||||||||
Grant number: | ERC-2009-AdG 247143-QUANTIF (ERC), 2012R1A6A3A03039226 (NRF), EP/F500378/1 (EPSRC) | ||||||||||
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