Article
Chemistry, Multidisciplinary
Adam Prekob, Mahitha Udayakumar, Gabor Karacs, Ferenc Kristaly, Gabor Muranszky, Anett Katalin Lesko, Zoltan Nemeth, Bela Viskolcz, Laszlo Vanyorek
Summary: The study focuses on synthesizing glassy carbon foam (GCF) catalyst supports from waste polyurethane elastomers and conducting pyrolysis and activation experiments using different gases. Palladium nanoparticles were highly dispersed, and the activated supports showed improved catalytic activity with higher hydrogenation rates.
Article
Chemistry, Physical
Suphitsara Maturost, Suwaphid Themsirimongkon, Surin Saipanya, Li Fang, Natthapong Pongpichayakul, Jaroon Jakmunee, Paralee Waenkaew
Summary: Pd/xCuO-10CNT (x = 1, 2, 3, 4) catalysts synthesized using an improved polyol method exhibit excellent oxidation performance and electrocatalytic activity, along with stability and CO poisoning tolerance. The insertion of CuO onto the CNT surface provides additional electrochemical active sites, facilitating charge transfer.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Adam Prekob, Gabor Muranszky, Milan Szori, Gabor Karacs, Ferenc Kristaly, Tibor Ferenczi, Bela Fiser, Bela Viskolcz, Laszlo Vanyorek
Summary: Carbon black-supported palladium-platinum catalysts were prepared with and without nickel(II) oxide or iron(III) oxide promoter materials using ultrasonic cavitation technology. The one-step catalyst preparation method without the need for post-treatments showed excellent catalytic activity in the hydrogenation of nitrobenzene, with no significant differences in selectivity and aniline yield observed even when promoters were present.
Article
Chemistry, Applied
Orsina Verdes, Viorel Sasca, Alexandru Popa, Mariana Suba, Silvana Borcanescu
Summary: In this study, pure and palladium doped 12-tungstophosphoric acid and its cesium salts were prepared and characterized, determining optimal reaction temperature and the impact of palladium on coke content during ethanol dehydration. By supporting HPW and PdyPW on mesoporous molecular sieve SBA-15, catalytic activity in ethanol dehydration reaction was improved, with palladium doping significantly decreasing coke deposit formation.
Article
Energy & Fuels
Arina N. Suboch, Olga Y. Podyacheva
Summary: Bamboo-like nitrogen-doped carbon nanotubes were utilized to synthesize supported palladium catalysts for hydrogen production via formic acid decomposition. The presence of nitrogen centers in N-CNTs plays a beneficial role in forming active isolated palladium ions and dispersed palladium nanoparticles. The activity of the catalysts is determined by the ionic capacity of N-CNTs and dispersion of metallic nanoparticles stabilized on the nitrogen centers.
Article
Polymer Science
Noelia Esteban, Miguel Claros, Cristina Alvarez, Angel E. Lozano, Camino Bartolome, Jesus M. Martinez-Ilarduya, Jesus A. Miguel
Summary: A new set of microporous organic polymers (POPs) with high microporosity and moderate thermal stability has been synthesized via Friedel-Crafts knitting. These polymers, containing diphosphine derivatives, act as efficient catalysts for Suzuki-Miyaura coupling reactions, exhibiting excellent recyclability.
Article
Chemistry, Physical
Theodora Ramantani, Vissarion Evangeliou, George Kormentzas, Dimitris I. Kondarides
Summary: The steam reforming of propane and LPG has been investigated over various catalysts on metal oxide supports. It was found that Ru and Rh catalysts exhibit higher activity, while the performance of Al2O3-supported Rh and 10%Ni catalysts deteriorates with time. The Ru-containing catalysts are more stable due to the formation of easily gasified carbon. The Ru/CeO2-ZrO2 catalyst showed the best results with high activity, selectivity, and stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Lucas G. Moura, Rafael P. Borges, Fabio B. Noronha, Carla E. Hori
Summary: The study investigated the catalytic activity and stability of nickel, platinum, rhodium, and ruthenium-based catalysts during hydrogen production from steam reforming of liquefied petroleum gas. It was found that rhodium and platinum catalysts exhibited higher catalytic activity and lower deactivation compared to nickel and ruthenium catalysts. Small increases in particle sizes of Ni(0) and Ru(0) during the process could contribute to the faster deactivation of Ru/CS and Ni/CS catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Multidisciplinary Sciences
Xiaorui Zhao, Yueqiang Cao, Linlin Duan, Ruoou Yang, Zheng Jiang, Chao Tian, Shangjun Chen, Xuezhi Duan, De Chen, Ying Wan
Summary: The use of Pd interstitial nano catalysts supported on ordered mesoporous carbon as catalysts for bisarylation of heteroarenes has shown high efficiency and selectivity, with no need for base, ligands, or phase transfer agents, and can be conducted in water. The catalytic reactivity is attributed to parallel adsorption of heteroarenes over Pd clusters, breaking the barrier to electron transfer and creating dual electrophilic sites. These findings suggest alternative synthesis pathways for a variety of organic chemicals using ordered mesoporous carbon supported palladium catalysts.
NATIONAL SCIENCE REVIEW
(2021)
Article
Chemistry, Multidisciplinary
Hasanudin Hasanudin, Wan Ryan Asri, Lola Andini, Fahma Riyanti, Ady Mara, Fitri Hadiah, Zainal Fanani
Summary: This preliminary research compared the catalytic activity of different catalysts in the conversion of isopropyl alcohol to diisopropyl ether through dehydration reaction. The results showed that the nickel phosphate-modified zeolite had higher acidity and catalytic activity. The highest catalytic activity was achieved by the zeolite-Ni(H2PO4)2 catalyst with a metal loading of 8 mEq/g.
Article
Chemistry, Applied
Eleonora Vottero, Michele Carosso, Riccardo Pellegrini, Monica Jimenez-Ruiz, Elena Groppo, Andrea Piovano
Summary: In this article, the behavior of activated carbon and Pt and Pd catalysts in the presence of H2 was investigated using Inelastic Neutron Scattering (INS) spectroscopy. The INS spectra provided detailed information about H2 physisorption and the formation of metal hydrides upon hydrogenation. The occurrence of hydrogen spillover from the metal nanoparticles onto the activated carbon was also observed. Overall, this work provides important insights for better understanding the complex interaction between H2 and Pt and Pd-loaded activated carbon catalysts.
Article
Chemistry, Physical
Tao Deng, Changlei Qin, Zhiliang Ou, Hongqiang Xia, Zongze Lv, Zhonghui Zhang
Summary: Tar, a by-product of biomass gasification, limits the application of syngas. Ni/pyrochlore catalysts with redox properties were investigated for toluene steam reforming, and Ni/La1.8Sr0.2Ce2 was found to be the most efficient and stable catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Abdallah F. Zedan, Safa Gaber, Amina S. AlJaber, Kyriaki Polychronopoulou
Summary: Significant enhancement of the catalytic activity for CO oxidation reaction was achieved by alloying Pd-based catalysts and utilizing different support materials, especially through nanointerfaces and morphology effects. The Pd-Cu/TiO2 catalyst system, with optimized nanowire morphology, shows the highest CO conversion rate at near-ambient temperatures, demonstrating its potential as an efficient and durable catalyst for CO oxidation reaction.
Article
Chemistry, Physical
Xinyi Miao, Fengwu Tian, Miaomiao Bai, Yujia Zhang, Wei Wang, Zuoping Zhao, Xianzhao Shao, Xiaohui Ji
Summary: In this study, a simple and effective strategy using NH2-functionalized, phosphorous-doped glucose-based porous carbon supported Pd nanoparticles was reported for promoting the reactivity of formic acid. The system exhibited exceptional catalytic activity, selectivity, and stability, producing CO-free hydrogen gas efficiently.
Editorial Material
Chemistry, Inorganic & Nuclear
Cyril Godard, Carmen Claver, Ana C. Albeniz
Summary: Supported catalysts offer both the activity of molecular catalysts and the convenience and reusability of catalysts in a difference phase. With continuous solutions to common problems such as leaching, supported catalysts are becoming increasingly viable for applied research.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)