Solar‐driven photocatalysis is a promising strategy for clean hydrogen (H2) generation cooperated with selective organic synthesis. Lignin, rich in aromatic units and functional groups, serves as an ideal hole sacrificial agent and substrate, facilitating H2 evolution and yielding high‐value chemicals/fuels. To boost overall photocatalytic redox efficiency, thermal catalysis was further combined to enhance the transfer and activity of photo‐generated carriers. And a highly controllable Cu‐based catalyst was developed using technical lignin‐carbon as an electron buffer. The active‐pyrolyzed lignin‐carbon layer precisely regulated the crystal dispersion of Cu species on Cu/SiO2, simultaneously dynamically constructing active electron‐rich Cu0 and electron‐deficient Cuσ+ (1 < σ ≤ 2) sites. Excellent thermo‐photo redox performances were achieved, with an H2 evolution rate up to 1313.2 μmol·gcat−1·h−1 and a yield of 45.2% for C13–C16 aromatic dimers from lignin monomers. This study reveals the highly utilization of lignin in functional catalysts, as well as the efficient production of H2 and jet fuel precursors.

中文翻译：

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木质素-碳缓冲 Cu 位点用于清洁的 H2 析出，与木质素升级为喷气燃料前驱体耦合


太阳能驱动的光催化是一种很有前途的清洁氢 （H2） 生成策略，与选择性有机合成相结合。木质素富含芳香族单元和官能团，是一种理想的空穴牺牲剂和底物，可促进 H2 的析出并产生高价值的化学品/燃料。为了提高整体光催化氧化还原效率，进一步结合热催化以增强光生载流子的转移和活性。并使用技术木质素碳作为电子缓冲剂开发了一种高度可控的铜基催化剂。活性热解木质素碳层精确调节了 Cu 种类在 Cu/SiO2 上的晶体分散，同时动态构建活性富电子 Cu0 和缺电子 Cuσ+ （1 < σ ≤ 2） 位点。实现了优异的热光氧化还原性能，H2 析出速率高达 1313.2 μmol·gcat−1·h−1，木质素单体的 C13–C16 芳香族二聚体的产率为 45.2%。本研究揭示了木质素在功能催化剂中的高度利用，以及 H2 和喷气燃料前驱体的高效生产。