Selectivity Modulated by Surface Ligands on Cu2O/TiO2 Catalysts for Gas-Phase Photocatalytic Reduction of Carbon Dioxide
- 주제(기타) Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
- 설명문(일반) [Jeong, Sunil; Kim, Gui-Min; Kang, Gil-Seong; Kim, Chanyeon; Lee, Hyunjoo; Lee, Doh C.] Korea Adv Inst Sci & Technol, Inst Nanocentury, Dept Chem & Biomol Engn, Daejeon 34141, South Korea; [Kim, Hyungjun] Korea Adv Inst Sci & Technol, Dept Chem, Daejeon 34141, South Korea; [Kim, Hyungjun] Korea Adv Inst Sci & Technol, Grad Sch EEWS, Daejeon 34141, South Korea; [Lim, Hyung Kyu] Kangwon Natl Univ, Div Chem & Bioengn, Chunchon 24341, Gangwondo, South Korea; [Kang, Gil-Seong; Lee, Sungho] KIST, Carbon Composite Mat Res Ctr, Wonju 55324, Jeollabukdo, South Korea; [Kim, Woo-Jae] Ewha Womans Univ, Dept Chem Engn & Mat Sci, Seoul 03760, South Korea; [Lee, Young Kuk] KRICT, Adv Mat Div, Daejeon 34114, South Korea
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2019
- URI http://www.dcollection.net/handler/ewha/000000166068
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acs.jpcc.9b05780
초록/요약
We report gas-phase photocatalytic CO2 reduction with Cu2O/TiO2 photocatalysts of varying surface passivation. With taurine adsorbed on the photocatalyst surface, the CH4 production rate increases and CO production rate decreases compared to photocatalysts with no ligand treatment. When ethylenediamine is present on Cu2O/TiO2 photocatalysts, CO selectivity enhances significantly. In situ Fourier transform infrared spectroscopy and density functional theory calculation reveal that the surface ligands on the photocatalyst surface alter the binding strength of reaction intermediates (e.g., CO) on surface atoms of the photocatalysts. Our findings cast light on a new design principle for the catalyst surface in selective CO2 conversion.
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