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Particle size effect of Ag-nanocatalysts deposited on carbon as prepared by γ-radiation induced synthesis
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Applied Physical Chemistry.ORCID iD: 0000-0001-8423-5314
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).ORCID iD: 0000-0003-3509-6754
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
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2019 (English)In: Radiation Physics and Chemistry, ISSN 0969-806X, E-ISSN 1879-0895, article id 108370Article in journal (Refereed) Published
Abstract [en]

The effect of silver particle sizes on the catalytic performance of Ag/C electrodes for oxygen reduction reaction (ORR) was studied. The Ag particles were precipitated from AgNO3 solutions on Vulcan XC-72 carbon as support by γ-radiation induced synthesis method. The structural and morphological characterizations of the electrode materials were done by X-ray diffraction (XRD) and transmission electron microscopy (TEM). It was found that particles with smaller diameters, 11 ± 6 nm, possess higher catalytic activity for ORR (50 mA/cm2 at 0.3 V) as compared to those with larger diameters, 41 ± 5 nm, ORR activity is 25 mA/cm2 at 0.3 V. The observed effect may be explained by an increased amount of low coordinated atoms in smaller particles as compared to the larger ones.

Place, publisher, year, edition, pages
Elsevier Ltd , 2019. article id 108370
Keywords [en]
Carbon, Catalyst activity, Electrodes, Electrolytic reduction, Gamma rays, High resolution transmission electron microscopy, Nanocatalysts, Silver compounds, Catalytic performance, Effect of silvers, Electrode material, Morphological characterization, Orr activities, Oxygen reduction reaction, Particle size effect, Radiation-induced synthesis, Particle size
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-261243DOI: 10.1016/j.radphyschem.2019.108370Scopus ID: 2-s2.0-85068784720OAI: oai:DiVA.org:kth-261243DiVA, id: diva2:1357421
Note

QC 20191003

QC 20191015

Available from: 2019-10-03 Created: 2019-10-03 Last updated: 2020-01-09Bibliographically approved

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Soroka, InnaCeder, JoakimMaier, Annika CarolinKiros, Yohannes

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Soroka, InnaBjervås, JensCeder, JoakimWallnerström, GustafConnan, MalloryMaier, Annika CarolinKiros, Yohannes
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Applied Physical ChemistrySchool of Engineering Sciences in Chemistry, Biotechnology and Health (CBH)Process Technology
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