Results 181 to 190 of about 27,771,751 (275)
ChemCatChem, EarlyView.In situ Raman spectroscopic characterization was applied to investigate supported catalytically active liquid metal solutions (SCALMS), revealing the role of hydrogen pretreatment and the formation of graphitic coke in propane dehydrogenation (PDH).
Sharanya Nair +7 more
wiley +1 more source
ChemCatChem, Accepted Article.The activation of electron poor allenes with Lewis base catalysts allows for unique transformations and chiral isochalcogenoureas were recently introduced as powerful catalysts for allenoate‐based (4+2)‐cycloadditions. We herein now report the use of these catalysts for the activation and control of allenylsulfones and propargylsulfones for asymmetric (
Mario Hofer +3 more
wiley +1 more source
pH Dependence of Noble Metals Dissolution: Ruthenium
ChemElectroChem, EarlyView.The real‐time potential‐dependent dissolution study of ruthenium catalyst shows that dissolution during dynamic operation across the whole pH spectrum can be correlated to the thermodynamic description of the formation of unstable species and thus brings the guidelines of stability limitations for future electrochemical applications of ruthenium‐based ...
Mária Minichová +4 more
wiley +1 more source
Graded Roll‐to‐Roll Slot Die Coating for High‐Throughput Catalyst Layer Studies
ChemElectroChem, EarlyView.In this work we present a tabletop roll‐to‐roll setup for high‐throughput parameter variations of catalyst layers. In a first study we changed the wet film thickness via variation of the volume flow into the slot die to generate all samples for a PEMFC cathode loading study in one single coating.
George Pätzold +5 more
wiley +1 more source
ChemElectroChem, EarlyView.The alkaline 2‐propanol to acetone electrooxidation activity trends for five electrocatalysts (Pd/C, Rh/C, PdRh/C, Pt/C and PtRu/C) are defined with rotating disk electrode (RDE) measurements and transmission electron microscopy (TEM) derived surface area values.
Iosif Mangoufis‐Giasin +7 more
wiley +1 more source
Pyrazine‐Functionalized Ru(II)‐Complexes as Visible‐Light Activated Photobases
Chemistry – A European Journal, EarlyView.Visible light excitation leads to the accumulation of electron density in pyrazine‐containing Ru(II) complexes via metal‐to‐ligand charge transfer (MLCT). In aqueous solutions of appropriate pH, excited‐state proton transfer (ESPT) takes place on a timescale of hundreds of ps.
Niklas Klosterhalfen +6 more
wiley +1 more source
Photoinduced Hydrogen Evolution Catalyzed by Co(II) Complexes of N5‐Donor Ligands
Chemistry – A European Journal, EarlyView.Cobalt(II) complexes of three related pentadentate ligands have been investigated as photoelectrochemical catalysts for proton reduction/hydrogen gas evolution in the presence of ruthenium, iridium, or copper‐based photosensitizers. Potential mechanisms for hydrogen evolution have been investigated by time‐resolved transient absorption spectroscopy and
Chuanshuai Li +14 more
wiley +1 more source
Excited State Branching Processes in a Ru(II)‐based Donor‐Acceptor‐Donor System
Chemistry – A European Journal, Accepted Article.Excited states properties such as excitation energy, accessibility of the respective excited state either by direct or indirect population transfer, and its lifetime govern the application of these excited states in light‐driven reactions, e.g. photocatalysis using transition metal complexes. Compared with triplet metal‐to‐ligand charge transfer (3MLCT)
Guangjun Yang +10 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.The in‐situ generation of Grignard‐type organocalcium reagents via the reduction of alkyl and aryl halides in THF and their immediate use for subsequent addition onto carbodiimides allows the synthesis of hitherto unknown amidinates of calcium. Abstract The in‐situ Grignard addition method adds intermediately prepared organo alkaline‐earth metal ...
Simon Sengupta +3 more
wiley +1 more source