| Autor: |
Guo, Chengqi, Jiang, Enhui, Chen, Qiuli, Li, Wanhe, Chen, Yahui, Jia, Shuhan, Zhou, Yiying, Liu, Zhonghuan, Lin, Xinyu, Huo, Pengwei, Li, Chunxiang, Ng, Yun Hau, Crittenden, John Charles, Zhu, Zhi, Yan, Yan |
| Zdroj: |
ACS Applied Materials & Interfaces; July 2024, Vol. 16 Issue: 28 p36247-36254, 8p |
| Abstrakt: |
Efficient photocatalytic solar CO2reduction 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 CO2photoreduction. Under concentrated sunlight, the optimal Mo2C–C0.5catalyst achieves CO2reduction reaction rates of 12000–15000 μmol·g–1·h–1to CO and 1000–3200 μmol·g–1·h–1to 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 CO2reduction. |
| Databáze: |
Supplemental Index |
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