Journal
JOURNAL OF CATALYSIS
Volume 366, Issue -, Pages 98-106Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2018.08.003
Keywords
Graphitic carbon nitride; Polyoxometalates; Photocatalytic hydrogen peroxide production; Oxygen reduction
Categories
Funding
- National Natural Science Foundations of China [21777176, 21707154, 51578532]
- Chinese Academy of Sciences [QYZDB-SSW-DQC018]
Ask authors/readers for more resources
The hybrid catalyst of g-C3N4-PWO has been prepared through the calcination of the g-C3N4 precursor of dicyandiamide and the polyoxometalates (POMs) precursor of (NH4)(3)PW12O40 (NH4-PW12). The hybrid catalyst of g-C3N4-PWO with well-defined and stable structure exhibits efficient catalytic performance for photocatalytic H2O2 production in the absence of organic electron donor under visible light. The value of electron transfer during the oxygen reduction reaction (ORR) process obtained from the Koutecky-Levich plot for g-C3N4-PWO (n = 1.73) is higher than that for g-C3N4 (n = 1.29), suggesting that the PWO incorporated into g-C3N4 framework can promote the electrons generation. The p-benzoquinone (PBQ) scavenger experiments, the electron spin resonance (ESR) signal and quantitative experiment of superoxide radicals (O-center dot(2)-) results reveal that the negative shifts of the conduction band (CB) level from g-C3N4 to g-C3N4-PWO can enhance the single-electron reduction of O-2 to O-center dot(2)- and further promote the sequential two-step single-electron O-2 reduction reaction to H2O2. (C) 2018 Published by Elsevier Inc.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available