当前位置： Xing Group >> 科学研究 >> 论文成果
Bifunctional core-shell co-catalyst for boosting photocatalytic CO<sub>2</sub> reduction to CH<sub>4</sub>
发布时间：2024-12-23点击次数：
- 关键字：PHOTOREDUCTION; MOF
- 摘要：Solar-light-driven CO2 reduction CO to CH4 and C2H6 is a complex process involving multiple elementary reactions and energy barriers. Therefore, achieving high CH4 activity and selectivity remains a significant challenge. Here, we integrate bifunctional Cu2O and Cu-MOF (MOF = metal-organic framework) core-shell co-catalysts (Cu2O@Cu-MOF) with semiconductor TiO2. Experiments and theoretical calculations demonstrate that Cu2O (Cu facilitates charge separation) and Cu-MOF (Cu2 improves the CO2 adsorption and activation) in the core-shell structure have a synergistic effect on photocatalytic CO2 reduction, reducing the formation barrier of the key intermediate *COOH and *CHO. The photocatalyst exhibits high CH4 yield (366.0 mu mol center dot g(-1)center dot h(-1)), efficient electron transfer (3283 mu mol center dot g(-1)center dot h(-1)) and hydrocarbon selectivity (95.5%), which represents the highest activity of Cu-MOF-based catalysts in photocatalytic CO2 reduction reaction. This work provides a strategy for designing efficient photocatalysts from the perspective of precise regulation of components.
- 卷号：17
- 期号：3
- 是否译文：否