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Hydrogen and carbon monoxide generation from laser-induced graphitized nanodiamonds in water

Title
Hydrogen and carbon monoxide generation from laser-induced graphitized nanodiamonds in water
Authors
Jang D.M.Im H.S.Myung Y.Cho Y.J.Kim H.S.Back S.H.Park J.Cha E.H.Lee M.
Ewha Authors
이민영
SCOPUS Author ID
이민영scopus
Issue Date
2013
Journal Title
Physical Chemistry Chemical Physics
ISSN
1463-9076JCR Link
Citation
vol. 15, no. 19, pp. 7155 - 7160
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Nanodiamonds (ND) were found to generate hydrogen (H2) and carbon monoxide (CO) from water at a remarkable rate under pulsed laser (532 nm) irradiation. The transformation of diamond structure into graphitic layers takes place to form an onion-like carbon structure. The CO generation suggests the oxidative degradation reaction of graphitic layers, C + H2O → CO + 2H+ + 2e-, which produced a unique laser-induced reaction: C + H2O → CO + H2. Au, Pt, Pd, Ag, and Cu nanoparticles on the ND enhance both gas evolution rates (∼2 times for Au) and graphitization and, specifically, Au was found to be the most efficient amongst other nanoparticles. The enhancement effect was ascribed to effective charge separation between the metal nanoparticles and ND. The Au-ND hybrid on the reduced graphene oxide produced consistently a greater photocurrent than the ND upon visible light irradiation. © 2013 the Owner Societies.
DOI
10.1039/c3cp50769f
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자연과학대학 > 화학·나노과학전공 > Journal papers
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