Article
Chemistry, Applied
Silvia Izquierdo, Guadalupe Silvero, Carlos J. Duran-Valle, Ignacio M. Lopez-Coca
Summary: The development of new chemical synthetic methodologies is important for transforming industrial chemical processes into more sustainable ones. The use of activated carbons as catalysts improves reaction rate, yield, and ease of work-up. The researchers found that simple modification of commercial xerogel with sulfuric acid results in a more efficient catalyst, which shows promising results in acetylation reaction.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jia Yu, Weiming Chen, Kaixuan Li, Chunhui Zhang, Mingzhu Li, Feng He, Lei Jiang, Yuliang Li, Weiguo Song, Changyan Cao
Summary: GDY can serve as a wettability modifier to enhance hydrogenation catalysis, and the modified catalyst shows improved performance in gas-liquid-solid tri-phase reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Environmental
Maciej Fronczak, Artur Kasprzak, Michal Bystrzejewski
Summary: The novel magnetic catalyst composed of palladium nanoparticles supported on surface-oxidized carbon-encapsulated iron nanoparticles exhibits excellent catalytic activity in hydrogenation reactions, with yields above 90% and consistent performance after multiple cycles. Compared to traditional methods, this approach is safer as it does not require the use of dangerous gaseous hydrogen.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Polymer Science
Eduard Karakhanov, Anton Maximov, Anna Zolotukhina
Summary: This article reviews the recent advances and applications of dendritic catalysis in the past two decades, with a focus on heterogeneous dendrimer-based catalysts. Three main approaches to synthesizing immobilized heterogeneous dendrimer-based catalysts are considered, and magnetically separable dendritic catalysts are also discussed. These dendritic catalysts can be stored as powders and easily separated from the reaction medium, maintaining efficiency similar to homogeneous dendritic catalysts.
Article
Chemistry, Physical
Jordi Ballesteros-Soberanas, Antonio Leyva-Perez
Summary: We demonstrate that palladium on carbon (Pd/C), a widely available supported Pd catalyst, becomes a selective catalyst after the addition of catalytic amounts of commercially available electron-poor phosphines in the semihydrogenation reaction of alkynes. The catalytic activity is <= 7 times greater, and the selectivity is comparable to that of the industrial benchmark Lindlar catalyst.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Ruiyan Sun, Yuhe Liao, Shao-Tao Bai, Mingyuan Zheng, Cheng Zhou, Tao Zhang, Bert F. Sels
Summary: This review comprehensively summarizes the latest advancements in heterogeneous catalysis of CO2 hydrogenation to formic acid/formate, highlighting nanostructured and single atom catalysts based on noble metals. Key factors related to catalytic activity are emphasized, providing a strong foundation for rational catalyst design.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Samia Mahouche-Chergui, Abdallah Oun, Imane Haddadou, Clementine Hoyez, Laurent Michely, Claudiane Ouellet-Plamondon, Benjamin Carbonnier
Summary: This work presents a straightforward and efficient approach for covalent surface modification of a sustainable graphene-like nanomaterial with abundant carboxylic acid groups, resulting in highly dispersed ultrasmall palladium particles with excellent catalytic activity for the reduction of toxic organic dyes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
M. Dolores Fernandez-Martinez, Cyril Godard
Summary: A simple procedure was used to synthesize two series of ligand-capped supported Pd nanoparticles catalysts, which were tested in formate synthesis. Among these series, PPh3 showed the most appropriate stabilizing ligand, while TiO2 was the most efficient support for these catalysts. The hydrogenation of CO2 was conducted under mild reaction conditions (1.8 MPa CO2, 1.8 MPa H-2, 60 degrees C) using water as a solvent and a base, resulting in excellent selectivity towards formates with a TON of 1032 (TOF of 69 h(-1), [HCOOK]=1.1 mol/l).
Article
Chemistry, Physical
Marian D. Roetzer, Maximilian Krause, Maximilian Huber, Florian F. Schweinberger, Andrew S. Crampton, Ueli Heiz
Summary: The study investigates the influence of electronic modifications of SiO2 thin films on the properties of supported Pd nanoparticles, showing that positive charging stabilizes hydrogen species and enhances hydrogenation reaction rates.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Bon Seung Goo, Kyungrok Ham, Yeji Han, Seunghoon Lee, Hayoon Jung, Yongmin Kwon, Youngmin Kim, Jong Wook Hong, Sang Woo Han
Summary: This study developed a novel approach to investigate the intrinsic catalytic reactivity of edge and terrace atoms in nanocrystal catalysts. By comparing the catalytic behaviors of edge-covered Pd NCs with those of pristine Pd NCs, researchers successfully decoupled the activity of edge and {110}-plane atoms.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Bon Seung Goo, Kyungrok Ham, Yeji Han, Seunghoon Lee, Hayoon Jung, Yongmin Kwon, Youngmin Kim, Jong Wook Hong, Sang Woo Han
Summary: This study successfully decouples the activity of the edge and {110}-plane atoms of Pd NCs by comparing the catalytic behaviors of edge-covered Pd NCs with pristine Pd NCs, providing a new method for more precise examination of the surface properties of various NC catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Engineering, Environmental
Collins Antwi Boasiako, Zhe Zhou, Xiangchen Huo, Tao Ye
Summary: Pd-based catalytic hydrogenation for nitrate decontamination has been extensively researched over the past 30 years, leading to new understandings of reaction mechanisms and the development of improved catalysts. However, technical and economic challenges still hinder large-scale implementation. In this review, we summarize reaction pathways, examine synthesis methods for Pd-based catalysts, introduce alternative hydrogen carriers and cost-effective metal catalysts, and emphasize the significance of hybrid catalytic systems for sustainable nitrate treatment. Future research needs are proposed to produce catalysts with industrial relevance.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Leyla Mohammadkhani, Majid M. Heravi, Farhad Panahi
Summary: This paper reports the efficient conversion of nitroarenes to anilines using immobilized palladium nanoparticles on a silica-starch substrate. The catalyst system exhibited high efficiency and could be reused multiple times.
MONATSHEFTE FUR CHEMIE
(2022)
Article
Polymer Science
Loc Tan Nguyen, Francesca Portone, Filip E. Du Prez
Summary: In this study, a scalable synthesis of catalyst-free, covalent adaptable networks (CANs) based on beta-amino amides was reported. The materials showed high activation energy and superior hydrolytic resistance.
Article
Chemistry, Multidisciplinary
Yuki Saito, Shu Kobayashi
Summary: The application of heterogeneous catalysts in continuous-flow enantioselective hydroacylation reactions was studied. Catalysts were prepared by mixing supports and rhodium complexes, and showed excellent activity and enantioselectivity. Under optimized conditions, the catalysts exhibited high turnover numbers and could be applied to various substrates. Furthermore, sequential-flow reactions with other heterogeneous catalysts were demonstrated for the synthesis of biologically active molecules and functional materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
