Article
Chemistry, Physical
Yangyang Zhou, Chen Chen, Qiling Li, Yanbo Liu, Ting Wei, Youzhen Liu, Zebing Zeng, Darren Bradshaw, Bing Zhang, Jia Huo
Summary: In this study, a new method for highly selective hydrogenation of α, β-unsaturated aldehydes in aqueous phase was reported, achieving precise control of all potential products by adjusting the role of AB in transfer and/or catalytic hydrogenation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Qinglin Liu, Qian Liu, Yurong Chen, Yinle Li, Hui Su, Qinghua Liu, Guangqin Li
Summary: The selective hydrogenation of alpha,beta-unsaturated aldehyde to unsaturated alcohol is a significant transformation. In this study, iridium nanoclusters confined within hollow MIL-101(Fe) exhibited high reaction activity and selectivity for cinnamaldehyde hydrogenation. The hollow structure of MIL-101(Fe) facilitated fast reactant transport and improved catalyst recyclability. Furthermore, the interactions between Ir nanoclusters and MIL-101(Fe) as well as the Lewis acid sites in MIL-101(Fe) contributed to the high selectivity of the desired product.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Sudakar Padmanaban, Yunho Lee, Sungho Yoon
Summary: In this study, a Ru-immobilized bisphosphine-based porous organic polymer (Ru@PP-POP) was used as an efficient heterogeneous catalyst for the chemoselective hydrogenation of cinnamaldehyde to cinnamyl alcohol with high chemoselectivity (98%) and excellent recyclability. The catalyst showed a high turnover number (970) and a high turnover frequency (240h^-1), representing the best activity obtained using a phosphine-based heterogeneous Ru-catalyst in this transformation.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Physical
Veronica Caballero, Rafael Estevez, Diego Luna, Felipa M. Bautista, Antonio A. Romero, Laura Aguado-Deblas, Jesus Hidalgo-Carrillo, Isabel Romero
Summary: In this study, two ruthenium(II) complexes were successfully immobilized on AlPO4-sepiolite, showing good catalytic activity and high enantioselectivity in liquid-phase hydrogenation reactions. The catalyst [(RuCl)Cl(bpea)(DPPE)](BF4)2 exhibited the highest Turn Over Number (TON), while [(RuCl)Cl(bpea){(S)(-)(BINAP)}](BF4) 1 demonstrated better reusability. Additionally, insights into the hydrogenation mechanisms of α,β-unsaturated carbonyl compounds over ruthenium catalysts were obtained.
Article
Chemistry, Inorganic & Nuclear
Sudakar Padmanaban, Gunniya Hariyanandam Gunasekar, Sungho Yoon
Summary: In this study, a heterogeneous, pincer-type Ru porous organometallic polymer (Ru-Macho-POMP) with a high surface area was prepared via direct heterogenization of a commercially available homogeneous pincer-type complex, Ru-Macho, using dichloromethane as the cross-linker through a Lewis acid-catalyzed Friedel-Crafts reaction. The Ru-Macho-POMP catalyst demonstrated high turnover frequency (TOF = 920 h(-1)), high turnover number (TON = 2750), high chemoselectivity (99%), and recyclability during the selective hydrogenation of alpha, beta-unsaturated carbonyl compounds.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Xin Zhang, Zonghan Li, Hongshuai Chen, Chaoren Shen, Haihong Wu, Kaiwu Dong
Summary: A parallel paired electrosynthetic method is developed for the first time, which couples the electrocarboxylation of CO2 into ketone, imine, and alkene with alcohol oxidation or oxidative cyanation of amine. Various carboxylic acids as well as aldehyde/ketone or α-nitrile amine were prepared at the cathode and anode respectively in a divided cell. The method demonstrates high atom-economic CO2 utilization, elevated faradaic efficiency (total FE of up to 166%), and broad substrate scope, with potential application in green organic electrosynthesis proven through the synthesis of pharmaceutical intermediates for Naproxen and Ibuprofen.
Article
Energy & Fuels
Jin Zhang, Mengting Gao, Pengqi Zhu, Yunwei Wang, Ruiyi Wang, Zhanfeng Zheng
Summary: This study developed an oxygen vacancy enriched MgAl-layered double hydroxide supported Co3O4 nanoparticle photocatalyst, which showed excellent catalytic performance under visible light irradiation, achieving high conversion and high selectivity in the hydrogenation reaction.
Article
Chemistry, Multidisciplinary
Qirui Liang, Qizhen Li, Lei Xie, Hui Zeng, Shan Zhou, Yanan Huang, Miao Yan, Xin Zhang, Tianyi Liu, Jie Zeng, Kang Liang, Osamu Terasaki, Dongyuan Zhao, Lei Jiang, Biao Kong
Summary: This study proposes a trapping-bonding strategy to achieve the superassembly of surface-enriched ruthenium nanoclusters on a modified nitrogen-doped carbon framework. The obtained catalyst shows a significantly higher activity in the hydrogen evolution reaction (HER) than commercial ruthenium/carbon and platinum/carbon catalysts, and also exhibits excellent performance in solar to hydrogen generation through water splitting.
Article
Biotechnology & Applied Microbiology
Yan Qiao, Can Wang, Yin Zeng, Tairan Wang, Jingjing Qiao, Chenze Lu, Zhao Wang, Xiangxian Ying
Summary: The study successfully constructed a strain expressing a fusion enzyme that achieved efficient NADP(+) regeneration and the selective oxidation of various alpha, beta-unsaturated alcohols. The researchers also optimized reaction conditions and established a platform for synthesizing valuable alpha, beta-unsaturated aldehydes.
MICROBIAL CELL FACTORIES
(2021)
Article
Chemistry, Multidisciplinary
Daniel J. Tindall, Steffen Mader, Alois Kindler, Frank Rominger, A. Stephen K. Hashmi, Thomas Schaub
Summary: Sugar alcohols are important for the food industry and can be produced in large quantities with increased yield and stereoselectivity through a homogeneous system.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Inorganic & Nuclear
Danfeng Zhao, Xiangjun Li, Kaiyue Zhang, Junzhen Guo, Xiubing Huang, Ge Wang
Summary: Metal-Organic Frameworks (MOFs) are highly versatile catalytic platforms for hydrogenation reactions due to their tunable pore size, structural diversity, large specific surface area, and functional tunability. MOFs can integrate various hydrogenation active sites, including metal nodes, organic ligands, and diverse pore structure-constrained guest species, such as metal nanoparticles. Additionally, MOFs can serve as templates/precursors for the synthesis of porous carbon materials, metal-based compounds, and their composites, leading to single-atom catalysts with superior activity. This review summarizes the progress in MOFs-based materials for catalytic hydrogenation, focusing on preparation strategies, structural design, and the synergy between active sites and structural properties, as well as the theoretical simulation studies of hydrogenation reaction pathways.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Physical
Yu Liang, Mark Douthwaite, Xiaoyang Huang, Binbin Zhao, Qiong Tang, Lei Liu, Jinxiang Dong
Summary: In this study, we developed an efficient method for depositing Pt particles on FeOx/SBA-15, using Pt-0-DVTMS precursor, and demonstrated its high performance and selectivity in the chemoselective hydrogenation of alpha,beta-unsaturated aldehydes. The research also showed the significant influence of metal support interactions on the selectivity and activity of the catalyst.
Article
Chemistry, Multidisciplinary
Alexia N. Kim, Aurapat Ngamnithiporn, Michael D. Bartberger, Brian M. Stoltz
Summary: The first asymmetric trans-selective hydrogenation of 1,3-disubstituted isoquinolines has been developed, resulting in enantioenriched trans-tetrahydroisoquinolines in good yield with high enantioselectivity. Mechanistic studies reveal the crucial role of non-coordinating chlorinated solvents and halide additives in enabling trans-selectivity.
Review
Chemistry, Multidisciplinary
Jian Wei, Ruwei Yao, Yu Han, Qingjie Ge, Jian Sun
Summary: The innovative process of CO2 hydrogenation through heterogeneous catalysis to produce important bulk chemicals offers a sustainable and cost-effective method for reducing CO2 emissions. Direct synthesis of unsaturated heavy hydrocarbons like alpha-olefins and aromatics presents significant challenges and progress in catalyst development and understanding of catalytic mechanisms. This review provides a comprehensive overview of the advancements in alpha-olefin and aromatic synthesis from CO2 hydrogenation, addressing catalyst fabrication, stability, reaction mechanisms, and future opportunities for carbon neutrality.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Organic
Jiahao Liu, Shidong Zhang, Zihong Luan, Yan Liu, Zhuofeng Ke
Summary: A simplified catalytic system has been developed to efficiently catalyze the selective dehydrogenation of allyl alcohol to form alpha,beta-unsaturated carbonyls without the use of additional oxidants or H-2 acceptors.
CHINESE JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)