| 학회 |
한국공업화학회 |
| 학술대회 |
2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
26권 1호 |
| 발표분야 |
포스터-환경·에너지 |
| 제목 |
CO2, H2O, and Sunlight to Hydrocarbon Fuels: A Sustained Sunlight to Fuel (Joule-to-Joule) Photoconversion Efficiency of 1% |
| 초록 |
Sunlight drived CO2, recycle in combination with water into hydrocarbon fuels is compatible with our current energy infrastructure. However, while the concept is intriguing such a technology has not been viable due to the vanishingly small CO2-to-fuel photoconversion efficiencies achieved. Herein we report a photocatalyst, reduced blue-titania sensitized with bimetallic Cu–Pt nanoparticles that generates a substantial amount of both methane and ethane by CO2 photoreduction under artificial sunlight (AM1.5): over a 6 h period 3.0 mmol g−1 methane and 0.15 mmol g−1 ethane are obtained, while no H2 nor CO is detected. This activity (6 h) translates into a sustained Joule (sunlight) to Joule (fuel) photoconversion efficiency of 1%, with an apparent quantum efficiency of φ = 86%. The time-dependent photoconversion efficiency over 0.5 h intervals yields a maximum value of 3.3% (φ = 92%). Isotopic tracer experiments confirm the hydrocarbon products originate from CO2 and water. |
| 저자 |
김화평, Saurav Sorcar, 인수일
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| 소속 |
DGIST |
| 키워드 |
Photocatalysis; CO2 reduction; Reduced titania; bimetallic Cu–Pt
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| E-Mail |
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