Results 111 to 120 of about 21,282 (312)

Hydrothermal Embedding of Pd Single Atoms Into SnO2 for Efficient CO Oxidation

Advanced Science, EarlyView.
By applying hydrothermal regulation to SnO2‐supported PdO, we achieve atomic dispersion of Pd into the SnO2 lattice, which activates the lattice oxygen neighboring Pd atoms to generate oxygen vacancies and facilitates subsequent O2 activation, thereby promoting CO oxidation to proceed via a low‐energy‐barrier MvK pathway while avoiding CO poisoning ...
Yingsheng An, Min Xiao, Mengyuan Zhang, Yao Lv, Yanwei Sun, Zhi Liu, Wenbo Pei, Hao Guo, Guangyan Xu, Yong Yan, Sheng Dai, Yunbo Yu, Hong He   +12 more
wiley   +1 more source

Demonstration of an AI-driven workflow for dynamic x-ray spectroscopy

npj Computational Materials
X-ray absorption near edge structure (XANES) spectroscopy is a powerful technique for characterizing the chemical state and symmetry of individual elements within materials, but requires collecting data at many energy points which can be time-consuming ...
Ming Du, Mark Wolfman, Chengjun Sun, Shelly D. Kelly, Mathew J. Cherukara   +4 more
doaj   +1 more source

STRUCTURAL STUDIES OF THE LIQUID Rb-RbBr SYSTEMS BY XANES

, 1986
Une étude XANES du seuil d'absorption K du brome est reportée pour le système fondu Rb/RbBr en fonction de la concentration.A XANES study above the Br K absorption edge of the molten Rb/RbBr system is reported versus ...
J. DUPUY, A. SADOC, J. F. JAL
core   +1 more source

Cobalt Single‐Atom Catalysts for Ultrafast Sulfamethoxazole Degradation: Unveiling the Chloride‐Ion‐Enhanced Formation of Co(IV)=O

Advanced Science, EarlyView.
An atomically dispersed Co–N4 single‐atom catalyst rapidly activates peroxymonosulfate to remove the antibiotic sulfamethoxazole from water. Common ions have little impact, but chloride dramatically speeds degradation by promoting a high‐valent Co(IV) = O oxidant via in situ HOCl–catalyst electron transfer.
Anting Ding, Jing Lu, Yafei Fan, Chenyu Zeng, Yuhang Lin, Yufei Shi, Zulin 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

Synergized Tri‐Phase Anode via Purposive Ba2+ Doping at the La3+ Site in LaFe0.7Ni0.3O3‐δ for Improved SOFC Performance

Advanced Science, EarlyView.
Purposive doping of low electronegative Ba2+ (0.89) at La3+ (1.1) site in LaFe0.7Ni0.3O3‐δ induces the formation of a tri‐phase composite, which shortens Fe─O bond and lowers activation energy, thereby significantly improves electrical conductivity and catalytic activity, and finally offers a record‐high peak power density in La0.5Ba0.5Fe0.7Ni0.3O3‐δ ...
Qian Yang, Shuaihang Chen, Yongli Peng, Xuelong Li, Xiaojian Pan, Fang Wang, Nanya Long, Li Li, Yilin Wang, Lina Su, Yuesong Shen, Ling Huang   +11 more
wiley   +1 more source

Near-field nano holographic tomography with chemical contrast exploiting low-dimensionality constraints

JPhys Photonics
X-ray absorption near-edge structure (XANES) spectroscopy is key to understanding functional materials. We present, to our knowledge, the first use of hard x-ray near-field holography (NFH) for three-dimensional (3D), spatially resolved XANES.
Johannes Gruen, Johannes Dora, Thea Engler, Martin Seyrich, Andreas Schropp, Jakob Soltau, Markus Osterhoff, Thomas L Sheppard, Tim Salditt, Christian G Schroer, Johannes Hagemann   +10 more
doaj   +1 more source

micro-XRF und XANES-Analytik von PFAS

, 2023
Ergebnispräsentation über gesammelte Ergebnisse der Synchrotron F µ-XRF und -XANES Spektroskopischen Untersuchungen von PFAS und PFAS-haltigen ...
Roesch, Philipp
core  

W‐N‐C Tandem Catalytic Centers Mediating Efficient Charge Transfer for the Enhanced Radical‐Path U(VI) Photoreduction

Advanced Science, EarlyView.
This work constructed a tandem W−N−C center to simultaneously achieve the regulation of reaction pathways and optimization of charge separation efficiency. The Lewis‐acidic W6+ sites activated O2 to generate O2−$O_2^ - $, with enhanced charge separation via electronic modulation, steering U(VI) reduction down an efficient radical pathway.
Zhiyao Wu, Jinhao Xu, Hao Fu, Yuxiang Deng, Nannan Wang, Wenhua Zhang, Peng Zhang, Zhiwei Huang, Zhenpeng Cui, Shu‐Xian Hu, Wangsuo Wu, Duoqiang Pan   +11 more
wiley   +1 more source

Hemeproteins: Recent Advances in Quantitative XANES Analysis

, 2007
Recently, we have shown that multiple scattering (MS) theory, via the MXAN package, is able to reproduce the experimental X-ray absorption near edge structure (XANES) data of biological samples, in particular hemeproteins, from the rising edge up to ...
M. BENFATTO, S. DELLA LONGA, A. ARCOVITO, D'ANGELO, Paola   +3 more
core   +1 more source