Results 151 to 160 of about 52,551 (253)

Revealing Structure–Performance Relations in Core‐Shell Catalyst‐Based PEM Water Electrolyzer Anodes with Low Iridium Loading

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Table of Contents The TiO2@IrO2 core–shell architecture ensures high electronic conductivity even at a low iridium content of 10 wt%. The resulting catalyst layer shows significantly higher iridium utilization than a commercial reference, leading to improved PEMWE single‐cell performance at low iridium loading.
Selina Finger, Darius Hoffmeister, Tien‐Ching Ma, Lena Fiedler, A. Lucía Morales, Andreas Körner, Nico Roubicek, Leopold Lahn, Johannes Böhmer, Thomas Przybilla, Erdmann Spiecker, Olga Kasian, Anna T. S. Freiberg, Karl J. J. Mayrhofer, Simon Thiele, Chuyen van Pham, Andreas Hutzler   +16 more
wiley   +1 more source

Polymerization of Heteroleptic Amphiphilic Osmium(II) Complexes at the Air/Water Interface: Attempts Toward Nanoarchitectonics in Form of Molecular Textiles

European Journal of Inorganic Chemistry, EarlyView.
Amphiphilic heteroleptic osmium(II) complexes enable a bottom‐up route toward molecular textiles via interfacial polymerization. Confined to a single monolayer, noncontact atomic force microscopy reveals predominantly linear polymers with partial branching.
Luise J. Sokoliuk, Antoine Hinaut, Salome L. Heim, Laurent Marot, Olaf Fuhr, Dieter Fenske, Ernst Meyer, Marcel Mayor   +7 more
wiley   +1 more source

Investigation of α‐Silylalcohols as Chiral Umpolung Carbanion Surrogates Through Stereospecific 1,2‐Brook Rearrangement

European Journal of Organic Chemistry, EarlyView.
Deprotonation of chiral α‐silyl secondary alcohols leads to masked polarity‐reversed chiral carbanions through stereospecific 1,2‐Brook rearrangement. In situ trapping with Weinreb amide electrophiles affords α‐hydroxyketones with moderate to excellent enantiospecificity (es).
TyAnn McHenry, Joshua D. Sieber
wiley   +1 more source

Axial Chirality Control Through Palladium‐Catalyzed Alkenylation Reactions for the Atroposelective Synthesis of 4‐Arylquinolin‐2‐ones

European Journal of Organic Chemistry, EarlyView.
Palladium(II)‐catalyzed intramolecular C─H alkenylation of cinnamides allows the atroposelective synthesis of axially chiral 4‐arylquinolones, with the chirality being installed by ring formation. DFT studies have shown that the reaction proceeds by prior activation of the alkene and the enantioselectivity is determined during the β‐hydride elimination
Brenda Fundora, Asier Carral‐Menoyo, Mikel Martinez‐Nunes, Sheila Brown, Yeray Ferrero, Yaneris Martinez‐Mendizábal, Nuria Sotomayor, Enrique Gómez‐Bengoa, Esther Lete   +8 more
wiley   +1 more source

Bridging Flavour and Fragrance: A Behaviour‐Based Olfactory Pyramid for Whisky Maturation Inspired by Perfumery Principles

Flavour and Fragrance Journal, EarlyView.
This framework transposes the perfumery olfactory pyramid to whisky maturation by sequencing aromas into top, heart, and base notes according to their temporal persistence. Using Log P as a behaviour‐based classification axis and oak macromolecules as natural fixative analogues, it proposes a behaviour‐based aromatic wheel bridging flavour chemistry ...
Magali Picard
wiley   +1 more source

The Antimethanogenic Nitrocompounds Can be Cleaved into Nitrite by Rumen Microorganisms: A Comparison of Nitroethane, 2-Nitroethanol, and 2-Nitro-1-propanol. [PDF]

Metabolites, 2019
Zhang ZW, Wang YL, Wang WK, Chen YY, Si XM, Wang YJ, Wang W, Cao ZJ, Li SL, Yang HJ.   +9 more
europepmc   +1 more source

Protic N‐Heterocyclic Carbene Ligands in Ruthenium‐Catalyzed Transfer Hydrogenation

Helvetica Chimica Acta, EarlyView.
The activity of ruthenium transfer hydrogenation catalysts is strongly influenced by the number of protic units in the N‐heterocyclic carbene ligand. Doubly protic NH, NH ligands induce slower activity than mono‐protic NH, NMe ligands, while NMe, NMe ligands display the highest activity, suggesting metal‐ligand cooperativity is not beneficial for these
Gianluca Righetti, Georgyi Koidan, Sergiy L. Filimonchuk, Svitlana Shishkina, Aleksandr Kostyuk, Martin Albrecht   +5 more
wiley   +1 more source

Chloride–bromide co‐engineering enables operationally stable quasi‐2D tin perovskite solar cells under ambient conditions

InfoScience, EarlyView.
Mixed halide perovskite systems consisting of iodide and bromide ions often suffer phase segregation. The segregation introduces instability, which can manifest in faster degradation of devices under operation. Here, we introduced a controlled amount of chloride ions into tin perovskite (TP) film containing iodide and bromide ions; the chloride ions ...
Jorim O. Obila, Chunqing Li, Masatoshi Yanagida, Yasuhiro Shirai, Yuko Takeoka   +4 more
wiley   +1 more source

A seamless and iterative DNA assembly method named PS-Brick and its assisted metabolic engineering for threonine and 1-propanol production. [PDF]

Biotechnol Biofuels, 2019
Liu S, Xiao H, Zhang F, Lu Z, Zhang Y, Deng A, Li Z, Yang C, Wen T.   +8 more
europepmc   +1 more source

Kinetic regulation of blended electrolytes enables long‐term state retention in organic artificial synapses

InfoMat, EarlyView.
Organic electrochemical transistor‐based artificial synapses are promising for neuromorphic computing, yet their performance is limited by poor state retention. Here, a kinetic regulation strategy is demonstrated using a blended poly(ionic liquid)/ionic liquid electrolyte.
Yujun Wang, Xiaodong Yin, Wenpei Li, Haorong Qi, Bei Zhang, Songjia Han, Chuan Liu, Chen Chen   +7 more
wiley   +1 more source