Results 61 to 70 of about 9,481 (204)

Catalytic conversion of nitrogen to ammonia by an iron model complex [PDF]

, 2013
The reduction of nitrogen (N_2) to ammonia (NH_3) is a requisite transformation for life. Although it is widely appreciated that the iron-rich cofactors of nitrogenase enzymes facilitate this transformation, how they do so remains poorly understood.
Anderson, John S., Peters, Jonas C., Rittle, Jonathan   +2 more
core   +2 more sources

Boric Acid Post‐Modified [Al]ZSM‐5 Zeolites: Properties, Acidity, and Ethanol/Ethene Conversion

Chemistry – A European Journal, EarlyView.
The modification of MFI zeolites with boric acid leads to the formation of framework boron, unstable surface species, and unbound deposits. Relevant BAS for catalysis and access to pores are strongly reduced. The boric acid is removed upon converting C1 or C2 alcohols and ethene. ABSTRACT The effect of boric acid post‐modification on [Al]ZSM‐5 zeolites
Zheng Li, Daniel Dittmann, Dennis Strassheim, Michael Dyballa   +3 more
wiley   +1 more source

Highly Active Ni- and Co-Based Bimetallic Catalysts for Hydrogen Production From Ammonia-Borane

Frontiers in Chemistry, 2019
Ammonia-borane is one of the most promising candidates for hydrogen carriers. A series of Ni- and Co-based bimetallic catalysts supported on SiO2 (Ni–M/SiO2 and Co–M/SiO2; M = Ga, Ge, Sn, Zn) was prepared and tested as catalysts for hydrogen production ...
Shinya Furukawa, Shinya Furukawa, Genki Nishimura, Tomoaki Takayama, Takayuki Komatsu   +4 more
doaj   +1 more source

Improvement of the kinetics of hydrogen release from ammonia borane confined in silica aerogel [PDF]

, 2017
Ammonia borane is a promising hydrogen storage material due to its high gravimetric capacity (19.6 % wt), but it also presents limitations such as a slow hydrogen release with a long induction time, a difficult regeneration, or the formation of foams and
Martín Martínez, Ángel, Rueda Noriega, Miriam, Sanz Moral, Luis Miguel, Segovia Puras, José Juan   +3 more
core   +1 more source

Transfer Hydrogenation of Organic Azides to Amines by Ammonia Borane Complex Under Mild Conditions Catalyzed by Reusable Au Nanoparticles

European Journal of Organic Chemistry, EarlyView.
Organic azides are readily reduced to amines under mild conditions by ammonia borane complex, catalyzed by a low loading level of reusable Au nanoparticles supported on TiO2. We present the first protocol for the chemoselective reduction of organic azides to amines by ammonia borane complex. In the presence of a low catalytic amount of Au nanoparticles
Elisavet‐Maria Zantioti‐Chatzouda, Dimitra Malliotaki, Ioannis Zachilas, Andreas‐Drakos Kokkinos, Orestis Agathocleous, Manolis Stratakis   +5 more
wiley   +1 more source

Ammonia borane-enabled hydrogen transfer processes: Insights into catalytic strategies and mechanisms

Green Energy & Environment, 2023
Transfer hydrogenation (TH) with in situ generated hydrogen donor is of great importance in reduction reactions, and an alternative strategy to traditional hydrogenation processes involving pressurized molecular hydrogen. Ammonia borane (NH3BH3, AB) is a
Wenfeng Zhao, Hu Li, Heng Zhang, Song Yang, Anders Riisager   +4 more
doaj   +1 more source

Synthesis of Amorphous‐Crystalline Mixture Boron Nitride for Balanced Resistive Switching Operation

Small, EarlyView.
An amorphous–crystalline mixture BN (acm‐BN) is synthesized through low‐pressure chemical vapor deposition, achieving balanced resistive switching with low SET voltage and stable RESET. High‐resolution transmission electron microscopy reveals that BN films are fully amorphous at 930 °C, a mixed amorphous–crystalline phase is achieved at 990 °C.
Kyung Jin Ahn, Do Kyeong Yun, Mi Hyang Park, Hong Woon Yun, Minh Chien Nguyen, Van Tu Vu, Huamin Li, Pallavi Aggarwal, Woo Jong Yu   +8 more
wiley   +1 more source

Singlet Excited States of Anions with Higher Main Group Elements

, 2013
Previous studies have shown that dipole-bound excited states exist for certain small anions. However, valence excited states have been reported for some closed-shell anions, but those with singlet valence excited states have, thus far, contained a single
Fortenberry, Ryan C.
core   +1 more source

Potassium‐Doped Borophane Nanosheets: A Multifunctional Platform for Reversible Hydrogen Storage and Metal‐Free Hydrogen Transfer

Small, EarlyView.
Borophane in dual roles: as a reductant in the conversion of levulinic acid to γ‐valerolactone and as a reversible hydrogen reservoir through partial rehydrogenation. ABSTRACT 2D borophene has long been proposed as a promising hydrogen storage material, but experimental demonstrations remain limited to boron hydride sheets derived from MgB2.
Rajamohanan Sobhana Anju, Pankaj Kumar, Dhanaji R. Naikwadi, Bettina Baumgartner, Savi Chaudhary, Atul Bansode, Merel C. Konings, Freek Ariese, Erdni D. Batyrev, Prasad Gonugunta, Vimal Chandra Srivastava, Ramaswamy Murugavel, N. Raveendran Shiju   +12 more
wiley   +1 more source

Enhanced ammonia-borane decomposition by synergistic catalysis using CoPd nanoparticles supported on titano-silicates [PDF]

, 2016
Pd and CoxPd1−x nanoparticles (NPs), synthesized using the reduction by solvent method, were loaded on SiO2 and Ti–SiO2 supports. The resulting catalysts were tested in the ammonia-borane decomposition reaction under dark and UV-vis conditions.
Berenguer-Murcia, Ángel, Cazorla-Amorós, Diego, García Aguilar, Jaime, Kuwahara, Yasutaka, Mori, Kohsuke, Navlani-García, Miriam, Yamashita, Hiromi   +6 more
core   +2 more sources