title: Reaction-Induced Self-Assembly of CoO@Cu2O Nanocomposites In Situ onto SiC-Foam for Gas-Phase Oxidation of Bioethanol to Acetaldehyde.
abstract: A high-performance SiC-foam-structured nanocomposite catalyst of CoO@Cu2O (i.e., 50-100 nm CoO partially covered with ca. 10 nm Cu2O) was engineered from nano- to macro-scales in one step for the high-throughput gas-phase aerobic oxidation of bioethanol to acetaldehyde. This special CoO@Cu2O nanostructure shows much higher activity/selectivity than other binary metal-oxide assemblies such as CuOx&CoO nano-mixtures or inverse Cu2O@CoO nanostructures. The catalyst was facilely but exclusively obtainable by in situ reaction-induced transformation of the respective metal nitrates supported on SiC-foam into the CoO@Cu2O nanostructure in the reaction stream. It achieved 95 % conversion with 98 % selectivity under mild conditions and was stable for at least 150 h for a feed of 20 vol % ethanol (much higher than in the literature: 1-6 vol %) at a high EtOH weight hourly space velocity of 8.5 h-1. Abundant Cu2O-CoO interfaces and high stability of the CoO@Cu2O nanostructure were responsible for the high activity/selectivity and promising stability in this reaction.
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P.R. China.
authors.forename: Guofeng
authors.initials: G
authors.lastname: Zhao
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P.R. China.
authors.forename: Songyua
authors.initials: S
authors.lastname: Fan
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P.R. China.
authors.forename: Xiaxia
authors.initials: X
authors.lastname: Pan
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P.R. China.
authors.forename: Pengjing
authors.initials: P
authors.lastname: Chen
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P.R. China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P.R. China.
authors.forename: Yong
authors.identifier: 0000-0002-5126-1476
authors.initials: Y
authors.lastname: Lu
mesh_terms: D000079:Acetaldehyde / Q000737:chemistry*; D017554:Carbon Compounds, Inorganic / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry*; D005740:Gases / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D017655:Silicon Compounds / Q000737:chemistry*
chemical_list: D017554:Carbon Compounds, Inorganic; D005740:Gases; D010087:Oxides; D017655:Silicon Compounds; D003035:Cobalt; D000431:Ethanol; D003300:Copper; D000079:Acetaldehyde; C000520:cuprous oxide; C060728:cobalt oxide; C022088:silicon carbide
keywords: ethanol; interface catalysis; nano oxides; oxidation; structured catalysts