IHEP OpenIR  > 北京同步辐射装置
Enhanced photocatalytic N-2 fixation via defective and fluoride modified TiO2 surface
BSRF用户
2021
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
EISSN1873-3883
Volume282Pages:119580
SubtypeArticle
AbstractPhotocatalytic N-2 fixation (PNF) provides a low-cost route to generate ammonia. The poor conversion efficiency from photon to ammonia seriously hinders the step forward because of the low concentration of N-2 molecules. Herein, we demonstrate a photocatalyst with surface oxygen vacancies (Vo) and a F modified surface to facilitate N-2 adsorption and activation on the surface of catalysts. The Vo site promotes the chemical adsorption of N-2, electron transfer from catalyst to N-2. F modification switches the TiO2 surface properties from hydrophilic to aerophilic, thus facilitating the adsorption of N-2. Meanwhile, the hydrogen reduction reaction (HER) is sup-pressed, as protons hard to adsorb on F capped surfaces. The optimal NH3 production rate can reach 206 mu molh(-1)g(-1), which is similar to 9 times higher than that of pure TiO2 nanoparticles (similar to 23 mu molh(-1)g(-1)). This report provides a potential strategy to overcome mass transfer limitation and achieve a high conversion efficiency in PNF.
DOI10.1016/j.apcatb.2020.119580
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS IDWOS:000591692300001
ItemNoBSRF00161
beamline1W1B
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/292929
Collection北京同步辐射装置
Recommended Citation
GB/T 7714
BSRF用户. Enhanced photocatalytic N-2 fixation via defective and fluoride modified TiO2 surface[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2021,282:119580.
APA BSRF用户.(2021).Enhanced photocatalytic N-2 fixation via defective and fluoride modified TiO2 surface.APPLIED CATALYSIS B-ENVIRONMENTAL,282,119580.
MLA BSRF用户."Enhanced photocatalytic N-2 fixation via defective and fluoride modified TiO2 surface".APPLIED CATALYSIS B-ENVIRONMENTAL 282(2021):119580.
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