选择性光电催化氧化甘油到二氧化通过增强的中吸附在Bi2O3-纳入的催化剂
Lan Luo1, Wangsong Chen1, Si-Min Xu1
1State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
Journal of the American Chemical Society
|March 30, 2022
概括
使用Bi2O3/TiO2光阳极对糖醇的光电催化提高了二乙 (DHA) 生产的选择性,达到75. 4%. 这种可持续的方法促进了生物质的价值化,
科学领域:
- 材料科学
- 电化学
- 催化剂
背景情况:
- 糖醇的光电催化 (PEC) 氧化是一种可持续的途径,用于化品和药品的宝贵化学物质二氧化 (DHA).
- 目前的方法具有较低的选择性 (≤60%),限制了实际应用.
研究的目的:
- 开发一种高度选择性的PEC过程,用于将糖氧化为DHA.
- 为提高效率和选择性设计一种新型异质光电极.
主要方法:
- 在TiO2纳米基阵列 (Bi2O3/TiO2) 上制造Bi2O3纳米粒子作为光电极.
- 在受控条件下进行PEC氧化实验.
- 结合实验和理论研究以阐明反应机制.
主要成果:
- 通过Bi2O3/TiO2光电极达到75.4%的DHA选择性.
- 在~50%的糖转换下保持了~65%的选择性.
- 证明了一种自动供电的PEC系统,其DHA生产率为1.04 mg cm-2 h-1和H2生产率为0.32 mL cm-2 h-1.
结论:
- 在Bi2O3/TiO2中的p-n结增强了电荷转移和光电流密度.
- Bi2O3通过与中间基组的相互作用促进了选择性甘油氧化.
- 这项研究强调了PEC阳极表面工程在生物质利用方面的潜力.
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