Due to the highly complex polyphenolic structure of lignin, depolymerization without a prior chemical treatment is challenging, and new catalysts are required. Atomically dispersed catalysts are able to maximize the atomic efficiency of noble metals, simultaneously providing an alternative strategy to tune the activity and selectivity by alloying with other abundant metal supports. Here, we report a highly active and selective catalyst comprising monodispersed (single) Pt atoms on Ni nanoparticles supported on carbon (denoted as Pt₁Ni/C, where Pt₁ represents single Pt atoms), designed for the reductive depolymerization of lignin. Selectivity toward 4-n-propylsyringol and 4-n-propylguaiacol exceeds 90%. The activity and selectivity of the Pt₁Ni/C catalyst in the reductive depolymerization of lignin may be attributed to synergistic effects between the Ni nanoparticles and the single Pt atoms.

由于木质素的高度复杂的多酚结构，没有预先化学处理的解聚具有挑战性，并且需要新的催化剂。原子分散的催化剂能够最大限度地提高贵金属的原子效率，同时提供一种替代策略，通过与其他丰富的金属载体合金化来调整活性和选择性。在这里，我们报告了一种高活性和选择性的催化剂，它包含单分散（单个）Pt 原子，位于碳负载的 Ni 纳米颗粒上（表示为 Pt ₁ Ni/C，其中 Pt ₁代表单个 Pt 原子），设计用于木质素的还原解聚。对 4-n-丙基紫丁香醇和 4-n-丙基愈创木酚的选择性超过 90%。Pt ₁的活性和选择性Ni/C 催化剂在木质素的还原解聚过程中可能归因于 Ni 纳米颗粒和单个 Pt 原子之间的协同作用。