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Scientific reports v.6, 2016년, pp.38010 -    SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Boron-doped diamond semiconductor electrodes: Efficient photoelectrochemical CO2 reduction through surface modification

Roy, Nitish (Photocatalysis International Research Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan ) ; Hirano, Yuiri (Photocatalysis International Research Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan ) ; Kuriyama, Haruo (Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan ) ; Sudhagar, Pitchaimuthu (ORC Manufacturing Co., Ltd, 4896 Tamagawa, Chino, Nagano 391-0011, Japan ) ; Suzuki, Norihiro (Environmental and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9EZ, UK ) ; Katsumata, Ken-ichi (Photocatalysis International Research Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan ) ; Nakata, Kazuya (Photocatalysis International Research Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan ) ; Kondo, Takeshi (Photocatalysis International Research Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan ) ; Yuasa, Makoto (Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan ) ; Serizawa, Izumi (Photocata ) ; Takayama, Tomoaki ; Kudo, Akihiko ; Fujishima, Akira ; Terashima, Chiaki ;
  • 초록  

    Competitive hydrogen evolution and multiple proton-coupled electron transfer reactions limit photoelectrochemical CO 2 reduction in aqueous electrolyte. Here, oxygen-terminated lightly boron-doped diamond (BDD L ) thin films were synthesized as a semiconductor electron source to accelerate CO 2 reduction. However, BDD L alone could not stabilize the intermediates of CO 2 reduction, yielding a negligible amount of reduction products. Silver nanoparticles were then deposited on BDD L because of their selective electrochemical CO 2 reduction ability. Excellent selectivity (estimated CO:H 2 mass ratio of 318:1) and recyclability (stable for five cycles of 3 h each) for photoelectrochemical CO 2 reduction were obtained for the optimum silver nanoparticle-modified BDD L electrode at −1.1 V vs. RHE under 222-nm irradiation. The high efficiency and stability of this catalyst are ascribed to the in situ photoactivation of the BDD L surface during the photoelectrochemical reaction. The present work reveals the potential of BDD L as a high-energy electron source for use with co-catalysts in photochemical conversion.


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