Results 121 to 130 of about 1,135,801 (376)

X‐Ray Absorption Spectroscopy Probing of Gold Electro‐Oxidation Reveals Intermediate Surficial Au(I)

ChemElectroChem
While Au electro‐oxidation in acidic aqueous media on a phenomenological level proceeds directly from Au(0) to Au(III), it has previously been suggested that Au(I) states are intermediate species of the oxidation mechanism.
David Degerman, Sara Boscolo Bibi, Bernadette Davies, Vladimir Grigorev, Aleksandr Kalinko, Tony Hansson, Sergey Koroidov   +6 more
doaj   +1 more source

Operando Spectroscopy to Understand Dynamic Structural Changes of Solid Catalysts

CHIMIA
Solid materials like heterogeneous catalysts are highly dynamic and continuously tend to change when exposed to the reaction environment. To understand the catalyst system under true reaction conditions,operando spectroscopy is the key to unravel small ...
Bidyut Bikash Sarma, Jan-Dierk Grunwaldt
doaj   +1 more source

Biosynthesis of Ag nanoparticles using Salicornia bigelovii and its antibacterial activity

Electronic Physician, 2018
Background and aim: In recent years, the field of nanotechnology has become the most active area of research in modern material science. While many chemical- as well as physical methods are also used, green synthesis of nanoparticles is becoming the ...
Mehrdad Khatami, Fatemeh Golshan Noor, Saeed Ahmadi, Mohammadreza Aflatoonian   +3 more
doaj   +1 more source

MnI‐Functionalized Covalent Organic Framework as Efficient Electrocatalyst for CO2 Reduction in a Catholyte‐Free Zero‐Gap Electrolyzer

Advanced Functional Materials, EarlyView.
This work demonstrates the successful integration of a phenanthroline‐based 2D COF with MnI catalytic sites into a catholyte‐free membrane‐electrode‐assembly cell for CO2 electroreduction. The crystalline COF actively suppresses Mn⁰–Mn⁰ dimerization, achieving a turnover frequency of 617 h⁻¹ at 2.8 V (full‐cell potential), and enabling stable operation.
Laura Spies, Marcos Eduardo G. Carmo, Gonçalves J. Marrenjo, Stephan Reuther, Patrick Ganswindt, Antonio Otavio T. Patrocinio, Thomas Bein, Osmando F. Lopes, Jenny Schneider   +8 more
wiley   +1 more source

Structural and Magnetic Properties of Biogenic Nanomaterials Synthesized by Desulfovibrio sp. Strain A2

Inorganics
This study explores the phase composition, local atomic structure, and magnetic properties of biogenic nanomaterials synthesized through microbially mediated biomineralization by the sulfate-reducing bacterium Desulfovibrio species strain A2 ...
Mikhail S. Platunov, Yuriy V. Knyazev, Olga P. Ikkert, Olga V. Karnachuk, Anton D. Nikolenko, Roman D. Svetogorov, Evgeny V. Khramov, Mikhail N. Volochaev, Andrey A. Dubrovskiy   +8 more
doaj   +1 more source

Observing heme doming in myoglobin with femtosecond X-ray absorption spectroscopy

Structural Dynamics, 2015
We report time-resolved X-ray absorption measurements after photolysis of carbonmonoxy myoglobin performed at the LCLS X-ray free electron laser with nearly 100 fs (FWHM) time resolution.
M. Levantino, H. T. Lemke, G. Schirò, M. Glownia, A. Cupane, M. Cammarata   +5 more
doaj   +1 more source

Study of the linear distribution of absorption spectra at the Ta L3 edge in LiNb(1-x)TaxO3 crystals using X-ray beam spectral-spatial modulation using adaptive X-ray optical elements [PDF]

Modern Electronic Materials
Based on previously proposed approaches for implementing monochromatic X-ray beam rapid spectra modulation method using adaptive X-ray optical elements, a new spatially resolved technique has been developed.
Yan A. Eliovich, Andrey I. Protsenko, Viktor A. Korzhov, Yuriy V. Pisarevsky, Mikhail V. Kovalchuk   +4 more
doaj   +3 more sources

Measurement of f orbital hybridization in rare earths through electric dipole-octupole interference in x-ray absorption spectroscopy [PDF]

, 2019
Amélie Juhin, Stephen P. Collins, Yves Joly, Maria Diaz‐Lopez, Kristina O. Kvashnina, Pieter Glatzel, Christian Brouder, Frank M. F. de Groot   +7 more
openalex   +1 more source

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

Advanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner, Julian Burkhart, Kateryna Borysova, Chiara Mazzariol, Klaus Müller‐Buschbaum   +4 more
wiley   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source