Results 51 to 60 of about 2,942 (197)

Breaking the Mold: Electrophilic Hydrophosphanation Emerges

Chemistry – A European Journal, EarlyView.
Electrophilic hydride attack on the olefin, instead of the classical nucleophilic addition by a phosphanido ligand, is unveiled in rhodium‐catalyzed olefin hydrophosphanation. This hydride‐driven pathway operates for both activated and inactivated olefins, with transition states characterized by elongated Rh─H bonds and nascent C─H bond formation ...
Víctor Varela‐Izquierdo, Janeth Navarro, Judit Cano‐Asensio, José A. López, Cristina Tejel   +4 more
wiley   +1 more source

Potential phytoavailability of anthropogenic cobalt in soils as measured by isotope dilution techniques

Science of The Total Environment, 2008
Isotope dilution is a useful technique to determine the potential phytoavailability of an element in soil. This method involves equilibrating an isotope with soil and then sampling the labile metal pool by analysis of the soil solution (E value) or plants growing in the soil (L value).
Bakkaus, Estelle, Collins, Richard N., Morel, Jean-Louis, Gouget, Barbara   +3 more
openaire   +4 more sources

Visible‐Light Driven Acetylene Semi‐Hydrogenation to Ethylene With a Copper Photosensitizer and a Cobaloxime Catalyst

Chemistry – A European Journal, EarlyView.
A fully noble‐metal‐free photocatalytic system that couples cobaloxime catalysis with Cu photosensitizer for HAT‐driven acetylene‐to‐ethylene conversion is reported. ABSTRACT The purification of ethylene streams from acetylene impurities remains a key industrial challenge, for which light‐powered strategies are emerging as sustainable alternatives to ...
Anna Fortunato, Sharon Silloni, Brando Adranno, Marianna Barbieri, Luka Đorđević, Francesca Arcudi   +5 more
wiley   +1 more source

Rationales for the Choice of Metals for Super‐Reduced Biological Metal Centers: Cobalt in Cobalamin Versus Nickel in F430

Chemistry – A European Journal, EarlyView.
DFT calculations on porphyrin, corrin, and corphin complexes of cobalt, rhodium, iron, manganese, or nickel, and QM/MM calculations on enzyme models, explore the factors controlling the availably of super‐reduced metal(I) states. True metal(I) states are seen in corrin only for cobalt, in corphin only for nickel, and not at all in porphyrin.
Radu‐Ioan Onija, Sergiu‐Raul Cosma, Adrian M. V. Brânzanic, Radu Silaghi‐Dumitrescu   +3 more
wiley   +1 more source

Sustainable Hydrogen Production by Glycerol and Monosaccharides Catalytic Acceptorless Dehydrogenation (AD) in Homogeneous Phase

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
Sustainable hydrogen production can be obtained from hydogen‐rich biomass‐derived organic molecules through Acceptorless Dehydrogenation (AD) reactions. Glycerol and sugars are available in large quantities from industry and can be successfully used as substrates in AD protocols, in the presence of tailored, selective, easily tunable and thermally ...
Sylwia Kostera, Luca Gonsalvi
wiley   +1 more source

Polyoxometalates in Photocatalytic CO2 Reduction: Multielectron Redox Regulation Across Molecular and Hybrid Architectures

EcoEnergy, EarlyView.
This review focuses on multielectron redox regulation across molecular and hybrid architectures for photocatalytic CO2 reduction, covering intrinsic POM photocatalysts, photosensitizer‐assisted assemblies, POM–metal–organic complexes, and POM‐integrated semiconductors and MOF/COF heterostructures to link structural motifs with charge transport, product
Bonan Li, Xiaowen Ruan, Sai Kishore Ravi
wiley   +1 more source

Synergistic Optical Strategies for Enhanced Perovskite Photocatalytic Activity

EcoEnergy, EarlyView.
This review addresses bottlenecks of halide perovskites' photoactive components from an optics‐driven perspective and organizes recent advances into four interconnected design principles. This review provides practical design principles and outlines key directions toward efficient, selective, and stable perovskite photocatalysis for CO2 reduction ...
Jaemin Jeong, Myeongjin Seol, Sang Hyun Ahn, Soo Young Kim   +3 more
wiley   +1 more source

Solar Fuels Via Methane Valorization: Thermochemical Pathways, Unified Metrics, and Techno‐Economic Perspectives

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A first‐of‐its‐kind review benchmarks three solar methane valorization pathways with unified performance metrics for clean fuel production. Meeting global climate targets and sustainable energy demands requires carbon‐neutral fuels and innovative conversion pathways.
Muhammad Abdulmoez, Amjad Othman, Majid Linjawi, Amro Al‐Qutub   +3 more
wiley   +1 more source

Zoning and contamination rate of magnesium and heavy metals of iron, zinc and copper in the north and northwest aquifer of Khoy (Zourabad) based on GIS and determining the contaminated source

Journal of Economic Geology, 2015
Introduction Heavy metals are the most toxic pollutants in aquatic ecosystems. This contamination can result from the release of heavy metal elements during alteration and weathering of ultramafic and mafic rocks (ophiolite zones).
Fariborz Khodadadi, Abdolnaser Fazlnia, Hossein Pirkharrati   +2 more
doaj  

Defective CeO2/Copper Phthalocyanine S‐Scheme Heterojunctions With Molecular Copper Centers for Selective CO2‐To‐CO Photoconversion

Electron, EarlyView.
Defective CeO2/CuPc S‐scheme heterojunction featuring oxygen‐vacancy‐rich ceria nanorods and atomically dispersed Cu–N4 molecular centers. Built‐in electric field mediates efficient S‐scheme charge separation, accumulating strongly reductive electrons at copper sites for selective CO2‐to‐CO photoconversion (92.2% selectivity) via *COOH stabilization ...
Sharafat Ali, Sher Ali, Ahmed Ismail, Ahmad Iqbal, Yong Wang, Syedul Hasnain Bakhtiar, Shah Rahim, Amir Zada, Asad Ali, Fazal Raziq, Huabin Zhang, Jiabao Yi, Liang Qiao   +12 more
wiley   +1 more source