title: Solvent-Free Synthesis of Zeolite Crystals Encapsulating Gold-Palladium Nanoparticles for the Selective Oxidation of Bioethanol.
abstract: The conversion of bioethanol into valuable products is an important area in the conversion of biomass. We demonstrate the successful synthesis of bimetallic gold-palladium (Au-Pd) nanoparticles encapsulated within S-1 zeolite crystals (AuPd@S-1) by a solvent-free strategy. This strategy allows highly efficient use of the noble metals, with more than 96 % of the gold and palladium being loaded into the final samples. Electron microscopy characterization and investigations with probe molecules confirm that the Au-Pd nanoparticles are encapsulated inside the S-1 crystals. The AuPd@S-1 catalyst is very active for the aerobic oxidation of bioethanol, giving 100 % conversion and 99 % selectivity to acetic acid. Even in the presence of 90 % water, the catalyst still gives a conversion higher than 80 % and a selectivity of 95 %. More importantly, the AuPd@S-1 catalyst exhibits excellent stability in the oxidation of bioethanol. These features are important for future practical applications of the AuPd@S-1 catalyst.
authors.affiliation: Key Laboratory of Applied Chemistry of Zhejiang Province, Zhejiang University, Hangzhou 310028 (PR China).
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Applied Chemistry of Zhejiang Province, Zhejiang University, Hangzhou 310028 (PR China). liangwang@zju.edu.cn.
authors.forename: Liang
authors.initials: L
authors.lastname: Wang
authors.affiliation: Key Laboratory of Applied Chemistry of Zhejiang Province, Zhejiang University, Hangzhou 310028 (PR China).
authors.forename: Longfeng
authors.initials: L
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Applied Chemistry of Zhejiang Province, Zhejiang University, Hangzhou 310028 (PR China).
authors.forename: Qinming
authors.initials: Q
authors.lastname: Wu
authors.affiliation: Key Laboratory of Applied Chemistry of Zhejiang Province, Zhejiang University, Hangzhou 310028 (PR China).
authors.forename: Chunyu
authors.initials: C
authors.lastname: Chen
authors.affiliation: Key Laboratory of Applied Chemistry of Zhejiang Province, Zhejiang University, Hangzhou 310028 (PR China).
authors.forename: Xiong
authors.initials: X
authors.lastname: Wang
authors.affiliation: Key Laboratory of Applied Chemistry of Zhejiang Province, Zhejiang University, Hangzhou 310028 (PR China).
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Ji
authors.affiliation: Key Laboratory of Applied Chemistry of Zhejiang Province, Zhejiang University, Hangzhou 310028 (PR China).
authors.forename: Xiangju
authors.initials: X
authors.lastname: Meng
authors.affiliation: Key Laboratory of Applied Chemistry of Zhejiang Province, Zhejiang University, Hangzhou 310028 (PR China). fsxiao@zju.edu.cn.
authors.forename: Feng-Shou
authors.initials: FS
authors.lastname: Xiao
mesh_terms: D056804:Biofuels; D003460:Crystallization; D000431:Ethanol / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles; D046529:Microscopy, Electron, Transmission; D010084:Oxidation-Reduction; D010165:Palladium / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D014961:X-Ray Diffraction; D017641:Zeolites / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D056804:Biofuels; D012997:Solvents; D017641:Zeolites; D000431:Ethanol; D010165:Palladium; D006046:Gold
keywords: biomass conversion; gold; nanoparticles; palladium; zeolites