Achieving “True” Selective Hydrogenation by CO Treatment of the Pt/TiO2 Catalyst

作者：Fengwei Zhang, Feng Hong, Xuetao Qin, Xiaoqiang Du, Xunzhu Jiang, Yawei Li, Hefang Guo, Peihao Liu, Wenhao Cui, Xiang‐Ting Min, Bin Zhang, Botao Qiao, Ding Ma · 发表于：Journal of the American Chemical Society · 年份：2025 · DOI：10.1021/jacs.5c04699 · 被引用次数：26 · 研究领域：Nanomaterials for catalytic reactions、Catalytic Processes in Materials Science、Asymmetric Hydrogenation and Catalysis

Selective hydrogenation represents a fundamental chemical transformation in industrial catalysis, yet achieving high selectivity remains a formidable challenge, particularly toward the conversion of less reactive functional groups over more reactive ones. Current approaches often rely on a preferential manner, requiring precise reaction control to prevent complete substrate conversion, which limits the operational flexibility and complicates product separation. Here, we demonstrate that a Pt/TiO 2 catalyst, when subjected to a simple CO gas thermal treatment, can enable the true selective hydrogenation of the thermally less reactive −NO 2 group while preserving the more reactive −C═C bond. Mechanistic studies reveal that the treated catalyst features two distinct active sites: single-atom Pt sites that facilitate −C═C bond hydrogenation through rapid, reversible hydrogen insertion and elimination, giving rise to an apparent nonactivity, and TiO x and C-encapsulated Pt nanoparticles that provide selective permeability for the −NO 2 group. The discovery offers a robust solution to the challenges of selective hydrogenation, presenting a versatile strategy for the design and preparation of highly selective catalytic systems with significant implications for industrial applications.