光热辅助生物质氧化用于将二氧化碳电还原与低细胞潜力配对
Houjun Chen1, Rongcheng Peng1, Ting Hu1
1College of Materials Science and Engineering, Hunan University, 410082, China.
ChemSusChem
|August 8, 2024
概括
本研究介绍了一种光热辅助方法,使用缺陷的氧化物来降低5甲基 (HMF) 氧化所需的能量. 这种方法有效地将HMF转化为有价值的化学物质,同时减少二氧化碳 (CO2).
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 将生物质价值化与二氧化碳电还原 (CO2RR) 整合在一起,为生产有价值的化学品提供了双重途径.
- 阳极氧化过程,特别是生物质衍生物,如5-基甲基 (HMF),往往需要高的过度潜能,限制效率.
- 开发高效的电催化剂和降低过量潜力的方法对于可持续的化学合成至关重要.
研究的目的:
- 开发一种光热辅助的策略,以减少HMF电氧化过量的潜力.
- 研究缺陷的氧化物 (D-Co3O4) 在近红外光下增强HMF氧化中的作用.
- 将增强的阳极HMF氧化与阴极CO2RR结合起来,共同生产增值化学品.
主要方法:
- 合成有缺陷的氧化物 (D-Co3O4) 与氧气空缺.
- 在近红外照明下对D-Co3O4的光热表征.
- 使用D-Co3O4和Ni-N/C催化剂对HMF氧化和CO2RR的电化学评估.
- 现场表面增强的红外光谱仪用于机械分析.
主要成果:
- D-Co3O4表现出显著的光热效应,达到175.47°C,并将HMF氧化潜力从1.7V降低到1.37V在30mA cm−2.2.
- 2,5-furandicarboxylic acid (FDCA) 被确定为HMF氧化的主要产物.
- 光热效应增强了HMF吸附,并促进了直接和间接的氧化途径.
- 使用Ni-N/C催化剂与正极CO2RR进行合,在低电池电位1.77V时,CO和FDCA的法拉戴效率>90%.
结论:
- 使用D-Co3O4的光热辅助是一种有效的策略,可以降低HMF氧化过量的潜力并提高反应速率.
- 综合系统可以有效地从生物质和CO2中共同生产有价值的化学物质 (FDCA和CO).
- 这项工作为可持续化学中综合生物质价值化和二氧化碳利用提供了一个有希望的途径.
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