Results 101 to 110 of about 15,552 (245)
Chemistry – A European Journal, EarlyView.The article describes the synthesis and molecular transformations of a silica‐supported bis(phosphine)methylplatinum(II) complex under reactive (H2, CO) and inert gas atmospheres. The focus lies on the stabilizing effect of the sterically non‐demanding trimethylphosphine ligand, which alters the reactivity of the surface sites, compared to other ...
Lea S. Kopietz +6 more
wiley +1 more source
Sedimentary Mercury Enrichments as a Tracer of Large Igneous Province Volcanism
Geophysical Monograph Series, Page 247-262., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Lawrence M. E. Percival +3 more
wiley +8 more sources
Applied SciencesThe Kocayayla Pb–Zn ± Cu vein-type mineralization is located in the Biga Peninsula, northwestern Türkiye. This study aims to constrain the geological, geochemical, and isotopic characteristics of the mineralization and to clarify its genetic ...
Sinan Akıska, Gökhan Demirela
doaj +1 more source
Bismuth Chalcogenide‐Based Photocatalysts for Nitrogen Reduction: Recent Progress and Prospects
Chemistry – A European Journal, EarlyView.Bismuth chalcogenides emerge as promising visible‐light photocatalysts for sustainable ammonia synthesis, driven by tunable electronic structures and strong N2 activation. Recent advances reveal how defects, doping and heterojunction design synergistically enhance charge separation and reactivity. Key challenges and future directions highlight pathways
Mukesh K. Verma +4 more
wiley +1 more source
On Metal Carbonyl Compounds in Catalytic Methanol Synthesis: Detection, Consequences, and Removal
Chemie Ingenieur Technik, EarlyView.Deactivation of Cu/ZnO/Al2O3 catalysts by metal carbonyl compounds in the feed gas is a critical problem in catalytic methanol synthesis. We utilize PTR–MS to identify potential chemical sources, detect contamination in an in‐house CO gas line, and validate filter methods for removing these catalyst poisons before synthesis.
Florian Stappert +4 more
wiley +1 more source
A GC-IRMS method for measuring sulfur isotope ratios of carbonyl sulfide from small air samples. [PDF]
Open Res Eur, 2021 Baartman SL +6 more
europepmc +1 more source
Experimental methods in chemical engineering: Temperature‐programmed oxidation—TPO
The Canadian Journal of Chemical Engineering, EarlyView.Abstract Temperature‐programmed oxidation (TPO) probes the oxidative capacity and redox properties of solid materials—catalysts, metal oxides, perovskites, and carbonaceous deposits. It identifies coke type, distribution, and reactivity. TPO instruments pass an oxidizing gas (diluted O2$$ {\mathrm{O}}_2 $$, air, or less commonly N2O$$ {\mathrm{N}}_2 ...
Gholamreza Roohollahi +7 more
wiley +1 more source
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
Locking Fe Single Atoms Into the Lattices of Mesoporous TiO2 Promotes Nitrogen Reduction
EcoEnergy, EarlyView.S‐coordinated Fe single‐atom catalysts on mesoporous TiO2 have been constructed by a universal lattice‐confined strategy. This catalyst shows a unique nanoconfinement effect for mass transfer and maximizes the active sites to mimic nitrogenase for ambient electrocatalytic N2 reduction reaction.
Danli Liang +3 more
wiley +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This review is about material design based on engineering multilevel sites from theoretical calculation and synthetic routes to mechanism, structure–activity relationship, challenges and perspectives for boosting hydrogen production in alkaline electrolyte. Electrolytic water splitting is a clean, carbon‐free method for producing green hydrogen and has
Ke Zhang +9 more
wiley +1 more source