Results 121 to 130 of about 40,331 (294)

MetalCenter‐Dependent Selectivity Divergence in MN4 Single‐Atom Catalysts for Aerobic HMF Oxidation

Advanced Science, EarlyView.
Two single‐atom catalysts with M‐N4 configurations (FeN4 and CoN4) were developed for selective HMF oxidation. FeN4 achieves 93.9% selectivity toward FFCA via superoxide anions (O2•−), while CoN4 preferentially produces FDCA through hydroxyl radicals (•OH). DFT calculations reveal that distinct adsorption energies and charge redistribution at the metal
Haoyu Wang, Zhilong Ye, Weihao Wang, Zhi Hu, Qing Tian, Jie Gao, Lianbing Zhang   +6 more
wiley   +1 more source

Interpretable multimodal machine learning analysis of X-ray absorption near-edge spectra and pair distribution functions

npj Computational Materials
We used interpretable machine learning to combine information from multiple heterogeneous spectra: X-ray absorption near-edge spectra (XANES) and atomic pair distribution functions (PDFs) to extract local structural and chemical environments of ...
Tanaporn Na Narong, Zoe N. Zachko, Steven B. Torrisi, Simon J. L. Billinge   +3 more
doaj   +1 more source

Nitrogen-Functionalized Graphene Nanoflakes (GNFs:N): Tunable Photoluminescence and Electronic Structures

, 2012
This study investigates the strong photoluminescence (PL) and X-ray excited optical luminescence observed in nitrogen-functionalized 2D graphene nanoflakes (GNFs:N), which arise from the significantly enhanced density of states in the region of {\pi ...
A. Ganguly, A. Kumar, B. Y. Wang, C. H. Chuang, C. W. Chen, C. W. Pao, Cancado L. G., Carlisle J. A., Chien C.-T., Chiou J. W., Cuong T. V., Eda G., Elias D. C., Ferrari A. C., Gan Z. X., Geim A. K., Geng D., Gokus T., H. M. Tsai, H. Yamane, H.-J. Lin, Haberer D., Han M. Y., J. W. Chiou, Jeong H.-K., K.-H. Chen, L. Liu, L.-C. Chen, Li X., Liu L., Lui C. H., Luo Z. T., M.-H. Tsai, Mattevi C., N. Kosugi, Novoselov K. S., P. Papakonstantinou, Pacilé D, Pao C. W., Pao C. W., Park S., Ponomarenko L. A., Ray S. C., Ray S. C., Ray S. C., Robertson J., Ronning C., S. C. Chen, S. I. Peng, Sekhar C. Ray, Sham T. K., Skytt P., Sun C. L., T. K. Sham, T. Regier, Tian J., Usachov D., van Veenendaal M., W. F. Pong, Wang Y., Ward M. J., Wei D., Wen J., Y. C. Shao, Y. C. Yeh, Y. F. Wang, Yan J.-A., Yan J.-A., Zhou J. G.   +68 more
core   +1 more source

DC‐magnetometry Analytical Tool Driven by Spin Ordering Phenomena for Sensing Chemical Interactions at the Surface of Nanomaterials

Advanced Science, EarlyView.
The adsorption of AsV on akaganeite nanorods was found to provide a magnetic signature. A change in the surface spin order gave rise to a second peak in the zero‐field cooled curve. AsIII adsorption does not provide any change in the magnetic behavior of the sorbent.
Marco Sanna Angotzi, Valentina Mameli, Alessandra Fantasia, Cesare Atzori, Giovanni Bertoni, Vincenzo Grillo, Giorgio Divitini, Dominika Zakutna, Jana Vejpravova, Martin Kalbac, Jan Plšek, Carla Cannas   +11 more
wiley   +1 more source

3D‐Printed Metal‐Supported MOF‐Heteropoly Acid Nanozyme for High‐Performance Peroxidase‐Mimic Activity and Ultra‐Sensitive Glucose Detection

Advanced Science, EarlyView.
A hierarchically structured Fe‐BTC‐PMA immobilized 3D‐printed platform is engineered as a robust artificial enzyme for colorimetric glucose sensing. The hybrid architecture efficiently activates H2O2 to drive TMB oxidation. This integrated system enables sensitive, reusable, and scalable detection with enhanced catalytic stability and analytical ...
Paramita Koley, Ranjithkumar Jakku, Subhash Chandra Shit, Jang Mee Lee, Guy N. L. Jameson, Tayebeh Hosseinnejad, Selvakannan Periasamy, Deshetti Jampaiah, Amrit Raj Paul, Ylias Sabri, Suresh K. Bhargava   +10 more
wiley   +1 more source

Local Geometry by XANES and RXS

, 2018
A brief overview of the capability of x-ray absorption near edge structure (XANES) and resonant x-ray scattering (RXS) in the hard x-ray region to determine the local geometrical structure around the photoabsorbing atom is presented.
openaire   +2 more sources

Tuning Defects in Ni‐Doped Maghemite for Enhanced Solar Driven Oxygen Evolution: Insights From Operando X‐Ray Spectroscopies

Advanced Science, EarlyView.
ABSTRACT Maghemite (γ$\gamma$‐Fe2${\rm Fe}_2$O3${\rm O}_{3}$) is a promising non‐precious‐metal‐containing photocatalyst for water oxidation (OER). Despite being less studied than Hematite, it offers similar corrosion resistance and a favorable band structure, along with higher conductivity and the advantage of an adaptable spinel structure.
Francesco Paparoni, Hélène Magnan, Antoine Barbier, Andrea Zitolo, AndreaDi Cicco, Javad Rezvani, Emiliano Fonda   +6 more
wiley   +1 more source

Depth distribution of secondary phases in kesterite Cu2ZnSnS4 by angle-resolved X-ray absorption spectroscopy

APL Materials, 2017
The depth distribution of secondary phases in the solar cell absorber material Cu2ZnSnS4 (CZTS) is quantitatively investigated using X-ray Absorption Near Edge Structure (XANES) analysis at the K-edge of sulfur at varying incidence angles.
J. Just, D. Lützenkirchen-Hecht, O. Müller, R. Frahm, T. Unold   +4 more
doaj   +1 more source

Stabilizing Atomically Dispersed Au With Adjacent Pt for Spatially Precise Molecule Recognition

Advanced Science, EarlyView.
A strategy to stabilize atomically dispersed Au catalysts by introducing Pt atoms into CeO2 supports is presented. Pt incorporation prevents Au aggregation, enhances Au‐O orbital coupling, and enables precise recognition of multi‐functionalized molecules, improving catalytic performance and the structural stability of Au‐based catalysts in ...
Rui Tang, Xiangyu Xiao, Jingyi Yao, Qing Wang, Qijing Gao, Nan Zhou, Fanyi Kong, Dingguan Liang, Kangning Dong, Liang Xiong, Yuwei Cao, Zhendong Lei, Liang Tang   +12 more
wiley   +1 more source

Spectroscopy-guided discovery of three-dimensional structures of disordered materials with diffusion models

Machine Learning: Science and Technology
Spectroscopy techniques such as x-ray absorption near edge structure (XANES) provide valuable insights into the atomic structures of materials, yet the inverse prediction of precise structures from spectroscopic data remains a formidable challenge.
Hyuna Kwon, Tim Hsu, Wenyu Sun, Wonseok Jeong, Fikret Aydin, James Chapman, Xiao Chen, Vincenzo Lordi, Matthew R Carbone, Deyu Lu, Fei Zhou, Tuan Anh Pham   +11 more
doaj   +1 more source