Single‐Atom Ru Anchored Mesoporous TiO<sub>2</sub> Phase‐Junction Promotes Photocatalytic Biomass Conversion
Duoxin Shi, Jiaming Zhang, Qi Zheng, Linlin Duan, Ruohan Yu, Qin Yue, Di Meng, Tianke Kang, Linjie Liu, Kun Lan, Wei Li, Dongyuan Zhao, Limin Wu, Yuzhu Ma
Abstract
Abstract Constructing advanced semiconductor nanoreactors is an effective route to boost the efficient photocatalytic conversion of biomasses to high‐value‐added products. Herein, single‐atom anchored flower‐like mesoporous TiO 2 nanoreactors with tunable anatase‐rutile crystalline phases are prepared via a micelle‐interface confined co‐assembly strategy (Ru 0.5 /A&R‐TNs). This approach not only facilitates the introduction of various monatomic/diatomic (e.g., Ru, Mo, Pd, Pt, etc.) sites but also spontaneously induces the TiO 2 phase transformation from anatase to rutile, achieving precise control of two‐phase ratios. The interface of the two phases with abundant oxygen vacancies (O v ) facilitates the adsorption and activation of 5‐hydroxymethylfurfural (HMF), which exhibits a high photocatalytic HMF oxidation to DFF (selectivity of 90.8%). Based on the optimal phase compositions, the doping of Ru single‐atom further exhibits a high atom utilization and suitable electronic structure. Therefore, the Ru 0.5 /A&R‐TNs achieve the cascade conversion from HMF to 5‐formyl‐2‐furoic acid with a selectivity of 75.8%. This research provides innovative ways for single‐atom catalyst synthesis, and the mechanism of synergistic catalytic action may provide new guidance for the photocatalytic conversion of high‐value‐added products from HMF.