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Efficient photocatalytic hydrogen evolution coupled with benzaldehyde production over 0D Cd_(0.5)Zn_(0.5)S/2D Ti_(3)C2 Schottky heterojunction

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Journal of Advanced Ceramics 2022年第7期11卷 1117-1130页

作者： Junnan TAO Mingyuan WANG Guiwu LIU Qinqin LIU Lei LU Neng WAN Hua TANG Guanjun QIAO School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of EducationSchool of Electrical Science and EngineeringSoutheast UniversityNanjing 210096China School of Environmental Science and Engineering Qingdao UniversityQingdao 266071China

Converting water into hydrogen fuel and oxidizing benzyl alcohol to benzaldehyde simultaneously under visible light illumination is of great significance,but the fast recombination of photogenerated carriers in photocatalysts seriously decreases the conversion ***,a novel dual-functional 0D Cd_(0.5)Zn_(0.5)S/2D Ti_(3)C2 hybrid was fabricated by a solvothermally in-situ generated assembling *** Cd_(0.5)Zn_(0.5)S nano-spheres with a fluffy surface completely and uniformly covered the ultrathin Ti_(3)C2 nanosheets,leading to the increased Schottky barrier(SB)sites due to a large contact area,which could accelerate the electron–hole separation and improve the light *** optimized Cd_(0.5)Zn_(0.5)S/Ti_(3)C2 hybrid simultaneously presents a hydrogen evolution rate of 5.3 mmol/(g·h)and a benzaldehyde production rate of 29.3 mmol/(g·h),which are~3.2 and 2 times higher than those of pristine Cd_(0.5)Zn_(0.5)S,*** the multiple experimental measurements and the density functional theory(DFT)calculations further demonstrate the tight connection between Cd_(0.5)Zn_(0.5)S and Ti_(3)C2,formation of Schottky junction,and efficient photogenerated electron–hole *** paper suggests a dual-functional composite catalyst for photocatalytic hydrogen evolution and benzaldehyde production,and provides a new strategy for preventing the photogenerated electrons and holes from recombining by constructing a 0D/2D heterojunction with increased SB sites.

关键词： Cd_(0.5)Zn_(0.5)S Ti_(3)C2 photocatalysis hydrogen benzaldehyde Schottky heterojunction

A comparative study of Ni/Al_2O_3–SiC foam catalysts and powder catalysts for the liquid-phase hydrogenation of benzaldehyde

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Journal of Materials Science & Technology 2019年第1期35卷 159-167页

作者： Kai Li Yilai Jiao Zhenming Yang Jinsong Zhang Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences University of Chinese Academy of Sciences

In this study, Al_2O_3-washcoated SiC(Al_2O_3–SiC) foams and Al_2O_3 powder were employed as the supports of a Ni catalyst for the liquid-phase hydrogenation of benzaldehyde. A series of Ni/Al_2O_3–SiC foam catalysts and Ni/Al_2O_3 powder catalysts with a Ni loading from 10 wt% to 37 wt% of the weight of Al_2O_3 were first prepared by a deposition–precipitation(DP) method. The catalytic activity and recyclability of both kinds of catalysts were then compared. Although it had a smaller accessible surface area with the reactant, the foam catalyst with a Ni loading of 16 wt% exhibited a slightly higher conversion of benzaldehyde after 6 h(of 99.3%) in comparison with the Ni/Al_2O_3 catalyst with identical Ni loading(conversion of 97.5%). When the Ni loading increased from 16 wt% to 37 wt%, the reaction rate obtained with the foam catalyst increased significantly from 0.108 to 0.204 mol L^(-1)h^(-1), whereas the reaction rate obtained with the powder catalyst increased from 0.106 to 0.123 mol L^(-1)h^(-1). Furthermore, the specific activity(moles of benzaldehyde consumed by 1 g min^(-1)of Ni) of the foam catalyst with a Ni loading above 30 wt% was superior to that of the powder catalyst because of its smaller Ni-particle size and higher mass-transfer rate. The foam catalyst displayed a high recyclability as a function of run times owing to the strong interaction between the Ni component and the Al_2O_3 coating. The conversion of benzaldehyde over the foam catalyst remained almost unchanged after being used 8 times. In comparison, a drop of 43% in the conversion of benzaldehyde with the powder catalyst was observed after being used 7 times due to the leaching of the Ni component.

关键词： Foam catalyst Powder catalyst benzaldehyde hydrogenation Ni loading Recyclability

Effect of manganese and potassium addition on CeO_2-Al_2O_3 catalyst for hydrogenation of benzoic acid to benzaldehyde

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Journal of Rare Earths 2009年第5期27卷 723-727页

作者：程党国侯春阳陈丰秋詹晓力 Department of Chemical and Biochemical Engineering Zhejiang University

A series of Mn/CeO2-Al2O3 and K/CeO2-Al2O3 catalysts for hydrogenation of benzoic acid to benzaldehyde were prepared to in- vestigate the effect of Mn, K addition on CeO2-Al2O3 catalyst. X-ray diffraction (XRD) and H2-temperature-programmed reduction (H2-TPR) results suggested that the interaction between CeO2 and MnOx enhanced the reducibility of catalysts and therefore benzoic acid conversion. The addition of K increased the number of basic number on the catalyst which leads to a high selectivity to benzaldehyde, but excessive addition imposed negative effects on the catalyst performance. A Mn-K/CeO2-Al2O3 catalyst was developed and investigated in the reaction. The simultaneous addition of Mn and K enhanced not only the catalytic activity but also the capacity to resist the coke formation over catalyst.

关键词： benzaldehyde benzoic acid CeO2 manganese potassium rare earths

Selectivity modulation in the consecutive hydrogenation of benzaldehyde via functionalization of carbon nanotubes

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Journal of Natural Gas Chemistry 2012年第3期21卷 241-245页

作者： Yonghua Zhou Jing Liu Xingyun Li Xiulian Pan Xinhe Bao State Key Laboratory of Catalysis Dalian Institute of Chemical Physicsthe Chinese Academy of SciencesDalian 116023LiaoningChina Chemistry and Chemical Engineering College Central South UniversityChangsha 410083HunanChina

Hydrogenation of benzaldehyde is a typical consecutive reaction, since the intermediate benzyl alcohol is apt to be further hydrogenated. Here we demonstrate that the selectivity of benzyl alcohol can be tuned via functionalization of carbon nanotubes （CNTs）, which are used as the support of Pd. With the original CNTs, the selectivity of benzyl alcohol is 88% at a 100% conversion of benzaldehyde. With introduction of oxygen-containing groups onto CNTs, it drops to 27%. In contrast, doping CNTs with N atoms, the selectivity reaches 96% under the same reaction conditions. The kinetic study shows that hydrogenation of benzyl alcohol is significantly suppressed, which can be attributed to weakened adsorption of benzyl alcohol. This is most likely related to the modified electronic structure of Pd species via interaction with functionalized CNTs, as shown by XPS characterization.

关键词： benzaldehyde benzyl alcohol hydrogenation consecutive reaction N-doped carbon nanotube palladium

A Simple Polyoxometallate for Selective Oxidation of Benzyl Alcohol to benzaldehyde with Hydrogen Peroxide

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Chinese Journal of Chemistry 2012年第2期30卷 433-437页

作者： Tian,Wei Hou,Yang Wang,Xiaoguang Lu,Bin Zhao,Jingxiang Cai,Qinghai Key Lab for Design&Synthesis of Functionalized Materials and Green Catalysis School of Chemistry and Chemical EngineeringHarbin Normal UniversityHarbinHeilongjiang 150025China

A series of Keggin-type polyoxometallates, M3（PW12O40）2 [M = Ni, Zn, Co, Mn, Cu], FePW12O40, Ni3（PMo12O40）2 and Ni2SiWl2040, were prepared and used as catalysts for selective oxidation of benzyl alcohol into benzaldehyde with H202 as an oxidant under solvent-free condition. Ni3（PW12040）2·26H2O afforded high catalytic activity with TON of 550.6 mol/（mol cat.） and 87.3% selectivity. However, this catalyst can be easily recovered and reused.

关键词： benzyl alcohol benzaldehyde polyoxometallates hydrogen peroxide

Design and synthesis of some new C_2-symmetric chiral disulfonamides from aminoacids and the application in diethyl zinc addition to benzaldehyde

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Chinese Journal of Chemistry 1998年第1期16卷 65-77页

作者：王建强钟民林国强 Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

Nine C2-symmetric chiral disulfonamldes were designed and synthesized from L-valine, L-phenylalanine and L-leucine respectively via one-pot ring opening of aziridines. The application of these disulfonamides as catalyst in the addition of diethyl zinc to benzaldehyde in three reagent systems: Ligand-Ti(OiPr)4-Et2Zn; Ligand-Ti(OiPr)4-H2O-Et2Zn; Ligand-Et2Zn was also described.

关键词： Aminoacids disufonamides diethyl zinc benzaldehyde asymmetric addition

A Novel Bimetallic Tetrahedron Cobalt Complex Promoting the Addition of Diethylzinc to benzaldehyde

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Chinese Chemical Letters 2001年第5期12卷 461-464页

作者： Wei Qiang ZHANG Zhi CHEN Yu Hua ZHANG Xin Yi ZHU Yu Gang CHEN Huan Wang JING Yuan Qi YIN State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000

Our recent work found a novel bimetallic tetrahedron cobalt complex which can catalyze the addition of diethylzinc to benzaldehyde effectively.

关键词： Catalyzed addition cobalt complex diethylzinc benzaldehyde

Novel, Green, Simple and Uncatalyzed Route for High Yield Preparation of benzaldehyde Glycol Acetal

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Chemical Research in Chinese Universities 2011年第5期27卷 799-802页

作者： TANG Jia SONG Ji-yuan WANG Ge YANG Mu GUO Wan-chun School of Material Science and Engineering University of Science and Technology Beijing Beij＇ing 100083 P. R. China

A simple approach for the condensation of benzaldehyde with ethylene glycol was adopted without employing any catalyst. The study reveals that factors including temperature, molar ratio of reactants, and the water removal significantly influence the conversion ratio of benzaldehyde. The results indicate that the use of optimal reaction conditions such as temperature and water removing exhibits more pronounced effects on the conversion ratio of benzaldehyde compared with the use of catalysts. In a word, a green and simple method for the condensation of aldehyde and menthandiol has been devised and investigated.

关键词： Condensation benzaldehyde Ethylene glycol

Interactions of phenol and benzaldehyde in electrocatalytic upgrading process

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Chinese Chemical Letters 2024年第2期35卷 464-468页

作者： Lan Liang Chuanbin Wang Xukai Lu Yunan Sun Beibei Yan Ning Li Guanyi Chen Li'an Hou School of Environmental Science and Engineering Tianjin Key Lab of Biomass/Wastes UtilizationTianjin UniversityTianjin 300350China School of Mechanical Engineering Tianjin University of CommerceTianjin 300134China Georgia Tech Shenzhen Institute Tianjin UniversityShenzhen 518071China High Tech Inst Beijing Beijing 100085China

Biomass pyrolysis oil can be improved effectively by electrocatalytic hydrogenation(ECH).However,the unclear interactions among different components lead to low bio-oil upgrading efficiency in the conversion ***,benzaldehyde and phenol,as common compounds in bio-oil,were chosen as model *** interactions between the two components were explored in the ECH process by combining experiments and theoretical *** showed that phenol could accelerate the conversion of benzaldehyde in the *** selectivity of benzyl alcohol was increased from 60.9%of unadded phenol to 99.1%with 30 mmol/L phenol concentration at 5 *** inhibited the ECH of *** the presence of benzaldehyde,the conversion rate of phenol was below 10.0%with no cyclohexanone and cyclohexanol formation at 5 *** density functional theory(DFT)calculations revealed that the phenol could promote the adsorption of benzaldehyde and facilitate the targeted conversion of benzaldehyde on the active site by lowering the reaction energy *** research on the interaction between phenol and benzaldehyde in the ECH provides a theoretical basis for the application of ECH in practical bio-oil upgrading.

关键词： Interaction Bio-oil Electrocatalytic hydrogenation Phenol benzaldehyde