Photo-to-Thermal Conversion Harnessing Low-Energy Photons Renders Efficient Solar CO2 Reduction
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
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Detail(s)
Original language | English |
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Pages (from-to) | 36247-36254 |
Journal / Publication | ACS Applied Materials and Interfaces |
Volume | 16 |
Issue number | 28 |
Online published | 4 Jul 2024 |
Publication status | Published - 17 Jul 2024 |
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Abstract
Efficient photocatalytic solar CO2 reduction presents a challenge because visible-to-near-infrared (NIR) low-energy photons account for over 50% of solar energy. Consequently, they are unable to instigate the high-energy reaction necessary for dissociating C═O bonds in CO2. In this study, we present a novel methodology leveraging the often-underutilized photo-to-thermal (PTT) conversion. Our unique two-dimensional (2D) carbon layer-embedded Mo2C (Mo2C-Cx) MXene catalyst in black color showcases superior near-infrared (NIR) light absorption. This enables the efficient utilization of low-energy photons via the PTT conversion mechanism, thereby dramatically enhancing the rate of CO2 photoreduction. Under concentrated sunlight, the optimal Mo2C-C0.5 catalyst achieves CO2 reduction reaction rates of 12000-15000 μmol·g-1·h-1 to CO and 1000-3200 μmol·g-1·h-1 to CH4. Notably, the catalyst delivers solar-to-carbon fuel (STF) conversion efficiencies between 0.0108% to 0.0143% and the STFavg = 0.0123%, the highest recorded values under natural sunlight conditions. This innovative approach accentuates the exploitation of low-frequency, low-energy photons for the enhancement of photocatalytic CO2 reduction. © 2024 American Chemical Society.
Research Area(s)
- 2D MXene, carbon dioxide reduction, photo-to-thermal conversion, photocatalysis, solar energy
Citation Format(s)
Photo-to-Thermal Conversion Harnessing Low-Energy Photons Renders Efficient Solar CO2 Reduction. / Guo, Chengqi; Jiang, Enhui; Chen, Qiuli et al.
In: ACS Applied Materials and Interfaces, Vol. 16, No. 28, 17.07.2024, p. 36247-36254.
In: ACS Applied Materials and Interfaces, Vol. 16, No. 28, 17.07.2024, p. 36247-36254.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review