Article
Chemistry, Physical
Stefan Peil, Dorothea Wisser, Melanie Staehle, Philip K. Rossmann, Yamini S. Avadhut, Martin Hartmann
Summary: Ammonia borane exhibits excellent hydrogen storage properties, with nanoconfinement in porous metal-organic frameworks shown to enhance its performance. By modifying the linker in the frameworks, the hydrogen release temperature can be lowered and the formation of gaseous byproducts reduced. In situ XRD diffraction and B-11 MAS NMR studies confirm the stability of the porous host and help identify ammonia borane decomposition products.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Bin Qu, Ye Tao, Lan Yang, Yihui Liu
Summary: Transition metal phosphide based orange-like Pd@Co@P nanoparticles supported on reduced graphene oxide have been synthesized by a one-pot co-reduction method. The catalyst exhibits higher catalytic activity for the hydrolytic production of ammonia borane, attributed to its unique structure and synergistic electron interactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Luyan Li, Yanxiao Li, Long Jiao, Xiaoshuo Liu, Zhentao Ma, Yu-Jia Zeng, Xusheng Zheng, Hai-Long Jiang
Summary: A yolk-shell nanostructured catalyst, PdAg@ZIF-8, was fabricated and demonstrated high efficiency selective hydrogenation of nitrostyrene under visible light irradiation at ambient temperature. The catalyst showed high activity, selectivity, and recyclability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Xinchun Yang, Liyu Chen, Hangyu Liu, Takuya Kurihara, Satoshi Horike, Qiang Xu
Summary: The controllable fabrication of ultrasmall, highly dispersed, and functionalized metal nanoparticles is crucial for industrial applications. By using a metal-Schiff base template approach, highly enhanced catalytic activity and durability in the methanolysis of ammonia borane were achieved, with a turnover frequency (TOF) value of 177 min(-1) at 303 K.
CELL REPORTS PHYSICAL SCIENCE
(2021)
Article
Chemistry, Physical
Rodrigo Gil-San-Millan, Magdalena Koziel, Wojciech Bury
Summary: The development of efficient, safe, and lightweight hydrogen storage and delivery systems is crucial for the realization of the Hydrogen Economy. This study presents a methodology for the development of nanocatalysts using porphyrinic multi-variate metal-organic frameworks (MTV-MOFs), which yield dispersed nanoalloys and demonstrate synergistic effects in the catalytic dehydrogenation of hydrogen molecular carriers.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Guoliang An, Xiaoxiao Xia, Shaofei Wu, Zhilu Liu, Liwei Wang, Song Li
Summary: This study assesses the feasibility of thermal energy storage using seven MOF-ammonia working pairs, finding that MIL-101(Cr) and ZIF-8(Zn) are potential candidates for thermal energy storage. Compared to the MIL-101(Cr)-water working pair, the MIL-101(Cr)-ammonia working pair shows higher sorption capacity and coefficient of performance, indicating a more efficient and stable thermal energy storage system.
Article
Chemistry, Physical
Marta Delgado Gomez, Marco Marazzi, Jose Elguero, Maxime Ferrer, Ibon Alkorta
Summary: Theoretical chemistry was used to design a system based on ammonia boranes catalyzed by pyrazoles for the production of dihydrogen as clean fuel. The reactivity of ammonia borane and cyclotriborazane with different pyrazole catalysts was investigated. The results suggest a catalytic cycle in which ammonia borane can store and produce dihydrogen and amino borane, and amino borane can trimerize to produce cyclotriborazane that can also generate dihydrogen. This study proposes a progress in using environmentally sustainable (metal free) catalysts to efficiently extract dihydrogen from small B-N bonded molecules.
Review
Chemistry, Physical
Sachin P. Shet, S. Shanmuga Priya, K. Sudhakar, Muhammad Tahir
Summary: Hydrogen has potential as a clean energy carrier, but its storage and safety issues need to be addressed. Metal-organic frameworks are efficient materials for hydrogen adsorption, and improvements in surface area and parameters can enhance hydrogen uptake capabilities.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Jing Jiang, Xinzhi Wang, Yao Tian, Li Tian, Lunhong Ai
Summary: Robust multifunctional substrates in heterogeneous catalysts are highly demanded to effectively stabilize active-metal centers and improve catalytic performances. In this study, a porous quasi-metal-organic framework (quasi-NiCo-MOF) is introduced as a smart substrate to spatially confine bimetallic NiCo-phosphide nanoparticles. A controllable thermal transformation strategy is demonstrated for deli-gandation and phosphorization of the parent NiCo-MOF. The resulting P-NiCo-MOF can efficiently activate and dissociate AB and H2O molecules, delivering a high hydrogen generation rate.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Boyang Cui, Guiming Wu, Shujun Qiu, Yongjin Zou, Erhu Yan, Fen Xu, Lixian Sun, Hailiang Chu
Summary: Highly active catalysts are essential for ammonia-borane hydrolysis for hydrogen production. In this study, a Ru/CoPCP catalyst with a special hollow structure was successfully synthesized, showing low activation energy and high catalytic performance. The synergy between Co metal and Ru nanoparticles in the Ru/CoPCP catalyst was confirmed through control experiments, demonstrating promising applications in heterogeneous catalysis.
ADVANCED SUSTAINABLE SYSTEMS
(2021)
Review
Chemistry, Physical
K. E. Lamb, C. J. Webb
Summary: This article discusses various methods of hydrogen storage and their importance in energy applications, with a particular focus on hydrogen storage in mixtures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Chemistry, Physical
Saim Ozkar
Summary: This review summarizes recent studies on the preparation and use of magnetically separable transition metal nanoparticles (TMNs) as reusable catalysts for the hydrolytic dehydrogenation of ammonia borane (AB). Research includes intrinsically magnetic TMNs, core-shell multimetallic nanoparticles, and TMNs supported on various materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Chemistry, Physical
Aysha Al Obeidli, Haifa Ben Salah, Mohammed Al Murisi, Rana Sabouni
Summary: Metal organic frameworks (MOFs) are crystalline materials containing metal ions and organic molecules, requiring harsh operating conditions and toxic solvents for synthesis. Research is ongoing for green and economical solvent-free MOFs synthesis routes to facilitate commercialization.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Xiwei Han, Xiaoxian Yang, Chuan Yu, Shuyan Lu, Ehsan Sadeghi Pouya, Peng Bai, Jiafei Lyu, Xianghai Guo
Summary: The modification of metal-organic frameworks by functionalizing ligands has been investigated in this study, leading to the construction of novel Zr-MOFs with improved adsorption properties towards CO2, CH4, N-2, and H-2 gases. Enhanced adsorption selectivity towards CO2/H-2 and improved high pressure H-2 adsorption were observed in the newly synthesized materials.
Article
Chemistry, Physical
Wei Cheng, Yumei Peng, Yi Wang, Weidong Jiang, Yan Long, Guangyin Fan
Summary: This study presents a method to fabricate high-performance Rh nanoparticles catalyst using an amino-group and space-confinement assisted strategy, significantly enhancing the catalytic performance for AB hydrolysis.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.