Results 51 to 60 of about 6,042 (221)

Exchange‐Coupled Two‐Dimensional MOFs

Advanced Functional Materials, EarlyView.
Graphene mediates ferromagnetic coupling between two‐dimensional metal‐organic frameworks and cobalt. Fe‐tetracyanobenzene develops a remanent magnetic response whose orientation follows the cobalt magnetization direction and persists up to room temperature, whereas Ni‐TCNB remains only field‐polarized.
Iulia Cojocariu, Pierluigi Gargiani, Manuel Valvidares, Frederik Schirdewahn, Matthias Muntwiler, Matteo Jugovac   +5 more
wiley   +1 more source

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source

Post‐Synthetic Zinc Modifications to Correct Speciation in Ti‐MWW Zeolites for Catalytic Oxidation

Angewandte Chemie, EarlyView.
Post‐synthetic Zn modifications of Ti‐MWW zeolite catalysts exhibit improved catalytic properties in the selective oxidation reaction, namely the ammoximation reaction. The origin of the beneficial effect of Zn is related via an array of spectroscopic and microscopic techniques to the modification of extra‐framework TiO2 and TiOx clusters and the ...
Christoph J. Kaul, Lukas Lätsch, Alexander V. Yakimov, Milivoj Plodinec, Xing Huang, Trees De Baerdemaeker, Jaroslaw Mormul, Peter Oechsle, Andrei‐Nicolae Parvulescu, J. Henrique Teles, Christophe Copéret   +10 more
wiley   +2 more sources

Active Phase of Nickel Electrocatalysts Driving Alkaline Hydrogen Evolution

Advanced Materials, EarlyView.
Using depth‐resolved and operando spectroscopic measurements coupled with electrochemical mass spectrometry, the authors uncover the critical role of sub‐surface oxidised species in increasing the activity and durability of Ni‐based cathodes for hydrogen evolution.
Yifeng Wang, Eleanor Ender, Santosh Kumar, Cindy Tseng, Guangmeimei Yang, Boxi Ye, Caiwu Liang, Youli Yu, Norton West, Inderjeet Chauhan, Jun H. Ng, Sid Halder, Sang Gu Ji, Georg Held, Mary P. Ryan, Katie L. Moore, Alex S. Walton, Reshma R. Rao   +17 more
wiley   +1 more source

NEXAFS imaging of synthetic organic materials

Materials Today, 2012
The utilization of near edge x-ray absorption fine structure spectroscopy (NEXAFS) in achieving strong, novel contrast for soft x-ray microscopy and scattering methods has been afforded significant success in elucidating outstanding issues in organic materials systems due to the unique combination of high sensitivity to chemical functionality and thus ...
Watts, Ben, Ade, Harald
openaire   +1 more source

Internal molecular conformation of organic glasses: A NEXAFS study

The Journal of Chemical Physics, 2021
The origin of the exceptional stability of molecular glasses grown by physical vapor deposition (PVD) is not well understood. Differences in glass density have been correlated with thermodynamic stability for thin films of N,N′-Bis(3-methylphenyl)-N,N′-diphenylbenzidine (TPD) grown by PVD at specific substrate temperatures below the glass transition ...
Amara Zuhaib, Stephen G. Urquhart
openaire   +3 more sources

CHARACTERIZATION OF ORGANIC GLASSES BY NEXAFS SPECTROSCOPY [PDF]

, 2022
The orientational order and morphology of organic thin films play an important role in defining their physical properties. The development of general techniques to define and control molecular orientation at the nanoscale may lead to improved performance
Zuhaib, Amara
core  

Molecular nitrogen in N-doped TiO2 nanoribbons† [PDF]

RSC Advances, 2015
The nitrogen doping of TiO2 nanoribbons during the thermal transformation of hydrogen titanate nanoribbons (HTiNRs) between 400 and 650 °C in a dynamic ammonia atmosphere was investigated using X-ray photoelectron spectroscopy (XPS), transmission X-ray ...
C. Bittencourt, M. Rutar, P. Umek, A. Mrzel, K. Vozel, D. Arčon, K. Henzler, P. Krüger, P. Guttmann   +8 more
doaj   +1 more source

Side‐Chain‐Induced Interlayer Slipping in Metalloporphyrin COFs Enables Microenvironment and Spin‐State Regulation for Photocatalytic CO2 Reduction

Advanced Materials, EarlyView.
Alkoxy chain length drives a continuous transition from eclipsed AA to a serrated, slipped AA* configuration over Co‐porphyrin COFs. A moderate slip both contracts the pore channel to enrich CO2 and suppress hydrogen evolution, and enhances collective high‐spin of Co sites, which delivers a record CO production rate with high selectivity.
Jie He, Qingxuan Chen, Minxian Zhang, Wenhao Zhao, Aoni Xu, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +8 more
wiley   +1 more source

Beyond Nitrogen in the Oxygen Reduction Reaction on Nitrogen-Doped Carbons: A NEXAFS Investigation

Nanomaterials, 2021
Polymer electrolyte membrane fuel cells require cheap and active electrocatalysts to drive the oxygen reduction reaction. Nitrogen-doped carbons have been extensively studied regarding their oxygen reduction reaction.
Eugenia Tanasa, Florentina Iuliana Maxim, Tugce Erniyazov, Matei-Tom Iacob, Tomáš Skála, Liviu Cristian Tanase, Cătălin Ianăși, Cristina Moisescu, Cristina Miron, Ioan Ardelean, Vlad-Andrei Antohe, Eugenia Fagadar-Cosma, Serban N. Stamatin   +12 more
doaj   +1 more source