Photocatalytic upgrading of renewable biomass is a promising way to relieve energy crisis and environmental pollution. However, low photocatalytic efficiency and uncontrollable selectivity still limit its development. Herein, ultrathin SnNb₂O₆ nanosheets with high dispersed Pt nanoparticles (Pt/SN) were successfully developed as an efficient photocatalyst for the precise hydrogenation of furfural (FUR) to furfuryl alcohol (FOL) under visible light irradiation and exhibited the high conversion of FUR (99.9%) with the high selectivity for FOL (99.9%). It was revealed that SN with only 4.1 nm thickness possess good separation ability of photo-generated carriers and abundant surface Lewis acid sites (Nb⁵⁺) which would selectively chemisorb and activate FUR molecules via the Nb···O = C coordination. Meanwhile, Pt nanoparticles would gather photo-generated electrons for greatly promoting the generation of active H species to support the hydrogenation of FUR to FOL. The synergistic effects between SnNb₂O₆ nanosheets and Pt nanoparticles remarkably facilitate the photocatalytic performance for hydrogenation. This work not only confirms the great potential of ultrathin nanosheet photocatalyst with functional metal sites for precise upgrading of biomass but also provides an in-depth view to understand the surface/interface interaction between reactant molecules and surface sites of a photocatalyst.

可再生生物质的光催化升级是缓解能源危机和环境污染的一种有前景的方法。然而，低光催化效率和不可控的选择性仍然限制了其发展。在此，成功开发了具有高分散 Pt 纳米粒子 (Pt/SN) 的超薄 SnNb ₂ O ₆纳米片作为高效光催化剂，用于在可见光照射下将糠醛 (FUR) 精确加氢为糠醇 (FOL)，并表现出高转化率FUR (99.9%) 对 FOL (99.9%) 具有高选择性。结果表明，厚度仅为 4.1 nm 的 SN 具有良好的光生载流子分离能力和丰富的表面路易斯酸位点（Nb ⁵⁺) 将通过 Nb···O = C 配位选择性地化学吸附和激活 FUR 分子。同时，Pt 纳米粒子会聚集光生电子，极大地促进活性 H 物种的产生，从而支持 FUR 氢化为 FOL。SnNb ₂ O ₆纳米片和Pt纳米颗粒之间的协同效应显着促进了氢化的光催化性能。这项工作不仅证实了具有功能金属位点的超薄纳米片光催化剂在生物质精确升级方面的巨大潜力，而且还为了解反应物分子与光催化剂表面位点之间的表面/界面相互作用提供了深入的视角。