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RuO2-ReO3 composite nanofibers for efficient electrocatalytic responses

Title
RuO2-ReO3 composite nanofibers for efficient electrocatalytic responses
Authors
Kim, Yu LimChoi, Hyun-ALee, Nam-SukSon, ByungrakKim, Hee JunBaik, Jeong MinLee, YoungmiLee, ChongmokKim, Myung Hwa
Ewha Authors
이종목이영미김명화
SCOPUS Author ID
이종목scopus; 이영미scopus; 김명화scopus
Issue Date
2015
Journal Title
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN
1463-9076JCR Link1463-9084JCR Link
Citation
vol. 17, no. 11, pp. 7435 - 7442
Publisher
ROYAL SOC CHEMISTRY
Indexed
SCI; SCIE; SCOPUS WOS
Abstract
We present a facile synthetic route to ruthenium dioxide (RuO2)-rhenium oxide (ReO3) electrospun composite nanofibers and their electrocatalytic responses for capacitance and H2O2 sensing. The contents of rhenium oxide of electrospun ruthenium dioxide (RuO2) were carefully controlled by an electrospinning process with the preparation of the precursor solutions followed by the thermal annealing process in air. The electrochemical applications of RuO2-ReO3 electrospun composite nanofibers were then investigated by modifying these materials on the surface of glassy carbon (GC) electrodes, RuO2-ReO3(n)/GC (n = 0.0, 0.07, 0.11, and 0.13), where n denotes the relative atomic ratio of Re to the sum of Ru and Re. Specific capacitance and H2O2 reduction sensitivity were remarkably enhanced depending on the amount of ReO3 increased. Among the four compositions of RuO2-ReO3(n), RuO2-ReO3(0.11)/GC showed the highest performances, i.e., a 20.9-fold higher specific capacitance (205 F g(-1) at a potential scan rate (v) of 10 mV s(-1); a capacity loss of 19% from v = 10 to 2000 mV s(-1)) and a 7.6-fold higher H2O2 reduction sensitivity (668 mu A mM(-1) cm(-2), normalized by GC disk area), respectively, compared to only RuO2/GC.
DOI
10.1039/c4cp05615a
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자연과학대학 > 화학·나노과학전공 > Journal papers
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