Open Access System for Information Sharing

Login Library

 

Article
Cited 83 time in webofscience Cited 86 time in scopus
Metadata Downloads

Spontaneous Generation of H2O2 and Hydroxyl Radical through O2 Reduction on Copper Phosphide under Ambient Aqueous Condition SCIE SCOPUS

Title
Spontaneous Generation of H2O2 and Hydroxyl Radical through O2 Reduction on Copper Phosphide under Ambient Aqueous Condition
Authors
Kim, HyejinLim, JonghunLee, S.Kim, Hak-HyeonLee, C.Lee, J.CHOI, WONYONG
Date Issued
2019-02
Publisher
AMER CHEMICAL SOC
Abstract
Copper phosphide (CuxP) was synthesized and tested for its reactivity for generating H2O2 through spontaneous reduction of dioxygen under ambient aqueous condition. The in situ generated H2O2 was subsequently decomposed to generate OH radicals, which enabled the degradation of organic compounds in water. The oxygen reduction reaction proceeded along with the concurrent oxidation of phosphide to phosphate, then copper ions and phosphate ions were dissolved out during the reaction. The reactivity of CuxP was gradually reduced during 10 cycles with consuming 8.7 mg of CuxP for the successive removal of 17 mu mol 4-chlorophenol. CoP which was compared as a control sample under the same experimental condition also produced H2O2 through activating dioxygen but did not degrade organic compounds at all. The electrochemical analysis for the electron transfers on CuxP and CoP showed that the number of electrons transferred to O-2 is 3 and 2, respectively, which explains why OH radical is generated on CuxP, not on CoP. The Cu+ species generated on the CuxP surface can participate in Fenton-like reaction with in situ generated H2O2. CuxP is proposed as a solid reagent that can activate dioxygen to generate reactive oxygen species in ambient aqueous condition, which is more facile to handle and store than liquid/gas reagents (e.g., H2O2, Cl-2, O-3).
URI
https://oasis.postech.ac.kr/handle/2014.oak/95289
DOI
10.1021/acs.est.8b06353
ISSN
0013-936X
Article Type
Article
Citation
ENVIRONMENTAL SCIENCE & TECHNOLOGY, vol. 53, no. 5, page. 2918 - 2925, 2019-02
Files in This Item:
There are no files associated with this item.

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher

최원용CHOI, WONYONG
Div of Environmental Science & Enginrg
Read more

Views & Downloads

Browse