Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 7, Issue 13, Pages 11455-11463Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b01284
Keywords
Photocatalysis; Plasma effect; Oxidative coupling of methane; CO2 reduction; Ethylene
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Funding
- National Natural Science Foundation of China [21576050, 51602052, 51672210]
- Jiangsu Provincial Natural Science Foundation of China [BK20150604]
- Fundamental Research Funds for the Central Universities of China [3207045403, 3207045409, 3207046414]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Zhongying Young Scholar of Southeast University
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Oxidative coupling of methane (OCM) using CO2 as the oxidant is a potential advancement for methane conversion and greenhouse gases reduction. However, the reaction is usually limited by both high energy consumption and strict reaction condition. Here, we report, for the first time, photoinduced efficient ethylene (C2H4) and CO production by OCM over TiO2-supported Ag nanoparticles at mild conditions. The success relies on a synergy coupling visible-light-induced strong surface plasma resonance (SPR) effect localized on Ag(0), ultraviolet-light-induced photoelectric effect on TiO2, and the separated adsorption of CO2 and CH4 on TiO2 and Ag. The yields of CO2 and C2H4 reach 1149 and 686 mu mol.g(-1).h(-1), respectively, under simulated solar irradiation. The origination of carbon-based gas products from CO2 and CH4 is also certified by a C-13 isotope-labeled experiment. This work presents a new and ideal route of photocatalytic OCM reaction for C2H4 and CO production by coupling both SPR and photoelectric effects.
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