文献类型：期刊文献

英文题名：Efficient Pt1Ni single-atom alloy catalyst for hydrogen-free catalytic fractionation of lignocellulose

作者：Zhou, Hao[1,2];Xiang, Qian[1];Guo, Zhiruo[1];Song, Kepeng[3];Shakouri, Mohsen[4];Guo, Yong[1];Liu, Xiaohui[1];Hu, Yongfeng[5];Cao, Xiao-Ming[6];Wang, Yanqin[1]

机构：[1]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai, Peoples R China;[2]Zhejiang Univ Sci & Technol, Sch Environm & Nat Resources, Hangzhou, Zhejiang, Peoples R China;[3]Shandong Univ, Electron Microscopy Ctr, Jinan, Peoples R China;[4]Canadian Light Source Inc, Saskatoon, SK, Canada;[5]Sinopec Shanghai Res Inst Petrochem Technol, Shanghai, Peoples R China;[6]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, State Key Lab Synergist Chembio Synth, Shanghai, Peoples R China

年份：2026

卷号：17

期号：1

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001766787700005)】；

基金：The authors thank the financially supports by the National Key Research and Development Program of China (2022YFA1504903, 2022YFA1504904, 2023YFA1507601) (Y.Q.W.) and assistance with XAS measurement from Canadian Light Source.

语种：英文

摘要：The production of monophenols from lignocellulose with cellulose intact without exogenous hydrogen via self-hydrogen supplied fractionation is promising, yet requires high metal loadings and yields saturated products. Herein, we report a single-atom alloyed Pt1Ni catalyst that achieves 50.9 wt% yield of phenolic monomers from birch sawdust with about 50% selectivity to valuable propenyl side-chained products under mild conditions (140 degrees C, 1 atm N-2), while preserving cellulose intact. Reaction pathway studies and density functional theory calculations based on a beta-O-4 model compound reveal three coexisting pathways. The Pt1Ni alloy preferentially promotes the dehydroxylation of C-alpha-OH and forms a key C-alpha = C-beta intermediate due to the oxygen affinity of Ni sites, and ultimately, enhance the production of valuable propenyl products via the synergistic effect of Pt and Ni. This work provides a strategy for maximizing Pt utilization and producing unsaturated chemicals from biomass under hydrogen-free conditions, advancing sustainable biorefining.