Photocatalytic Upgrading of Lignin Oil to Diesel Precursors and Hydrogen
作者:Zhaolin Dou、Zhe Zhang、Hongru Zhou、Min Wang
DOI:10.1002/anie.202105692
日期:2021.7.19
Producing renewable biofuels from biomass is a promising way to meet future energy demand. Here, we demonstrated a lignin to diesel route via dimerization of the lignin oil followed by hydrodeoxygenation. The lignin oil undergoes C−C bond dehydrogenative coupling over Au/CdS photocatalyst under visible light irradiation, co-generating diesel precursors and hydrogen. The Au nanoparticles loaded on CdS
从生物质中生产可再生生物燃料是满足未来能源需求的一种很有前景的方式。在这里,我们通过木质素油的二聚化和加氢脱氧展示了木质素到柴油的路线。在可见光照射下,木质素油在 Au/CdS 光催化剂上发生 C-C 键脱氢偶联,共同产生柴油前体和氢气。负载在 CdS 上的 Au 纳米粒子可以有效抑制光生电子和空穴的复合,从而提高二聚反应的效率。大约 2.4 mmol g catal -1 h -1二聚体和 1.6 mmol g catal -1 h -1 H 2是在 Au/CdS 上产生的,分别是 CdS 的 12 倍和 6.5 倍。柴油前体最终分别通过使用 Pd/C 或多孔 CoMoS 催化剂的加氢脱氧反应转化为 C16-C18 环烷烃或芳烃。将松木屑转化为柴油是为了证明木质素到柴油路线的可行性。
Photoredox-Catalysis-Modulated, Nickel-Catalyzed Divergent Difunctionalization of Ethylene
photoredox catalysis. Mechanistic studies suggest that the observed selectivity was due to different active states of Ni(I) and Ni(0) modulated by Ru- and Ir-based photoredox catalysts, respectively. The ability to access different organometallic oxidation states via photoredox catalysis promises to inspire new perspectives for synergistic transition-metal-catalyzed divergent synthesis.