Results 91 to 100 of about 23,193 (311)

Reinforcing Oxygen Activation of Spinel Oxide via Mn─O Covalency Engineering for VOCs Oxidation

Advanced Science, EarlyView.
A MnCo spinel catalyst with weakened Mn─O covalency was synthesized via a hard‐template method. The reduced Mn─O covalency facilitates localized electron redistribution, promoting the activation of both molecular oxygen and lattice oxygen, and thereby enabling the efficient and complete oxidation of VOCs (ethyl acetate, toluene, and propane).
Gan Li, Ruochen Zhou, Qianqian Chen, Guobo Li, Xiang Tu, Fengbo Yu, Wenming Liu, Jian Ji, Honggen Peng   +8 more
wiley   +1 more source

Biogenic non-crystalline U(IV) revealed as major component in uranium ore deposits

Nature Communications, 2017
Crystalline uraninite is believed to be the dominant form in uranium deposits. Here, the authors find that non-crystalline U(IV) generated through biologically mediated U(VI) reduction is the predominant U(IV)species in ore deposits, implying that ...
Amrita Bhattacharyya, Kate M. Campbell, Shelly D. Kelly, Yvonne Roebbert, Stefan Weyer, Rizlan Bernier-Latmani, Thomas Borch   +6 more
doaj   +1 more source

Laboratory EXAFS in a dispersive mode

Journal of Applied Crystallography, 1988
A laboratory dispersive mode spectrometer, capable of operating in either the analysing crystal transmission mode or a reflection mode, is described. Extended X-ray absorption fine structure (EXAFS) spectra of Re and ReO2, obtained in the transmission mode, compare favourably with those from a scanning spectrometer at a synchrotron source.
BUSCHERT R, GIARDINA MD, MERLINI A, BALERNA A, MOBILIO, Settimio   +4 more
openaire   +3 more sources

X-ray-Raman-scattering-based EXAFS beyond the dipole limit

, 2011
X-ray Raman scattering (XRS) provides a bulk-sensitive method of measuring the extended X-ray absorption fine structure (EXAFS) of soft X-ray absorption edges.
Monaco, Giulio, Keijo Hämäläinen, K. Hamalainen, Giulio Monaco, Simo Huotari, T. Pylkkanen, J. A. Soininen, S. Huotari, J. Aleksi Soininen, Joshua J. Kas, Tuomas Pylkkänen, J. Kas   +11 more
core   +1 more source

Atomic Interlayer Mo–N4 Sites Enable Rapid Charge Transfer and Efficient CO2 Photoreduction

Advanced Science, EarlyView.
This work achieved efficient CO2 activation and ultrafast interlayer electron transport in a 2D COF by constructing atomic‐level Mo‐N4‐induced interlayer electron bridges (IEB), thereby kinetically and thermodynamically co‐driving the photocatalytic coupling of CO2 reduction with 4‐methoxybenzyl alcohol oxidation.
Lijuan Sun, Haiwei Su, Zhen Chen, William Orbell, Guijie Liang, Weikang Wang, Lele Wang, Juan Yang, Qinqin Liu, Junhua Li   +9 more
wiley   +1 more source

One‐Dimensional RuIrTe Nanotubes with Amorphous Surface as a Highly Active and Stable Electrocatalyst Toward Oxygen Evolution Reaction in Acidic Media

Advanced Science, EarlyView.
A rational etching‐induced reconstruction strategy is demonstrated to fabricate one‐dimensional RuIrTe ternary nanotubes with a unique amorphous‐crystalline heterostructure. This hierarchical architecture synergistically optimizes mass transport and electronic configurations, delivering record‐breaking performance in proton exchange membrane water ...
Zhi Liang Zhao, Zhe Zhang, Shaoxuan Yang, Jie Zhang, Qi Wang   +4 more
wiley   +1 more source

Sorption Speciation of Lanthanides/Actinides on Minerals by TRLFS, EXAFS and DFT Studies: A Review

Molecules, 2010
Lanthanides/actinides sorption speciation on minerals and oxides by means of time resolved laser fluorescence spectroscopy (TRLFS), extended X-ray absorption fine structure spectroscopy (EXAFS) and density functional theory (DFT) is reviewed in the field
Xiaoli Tan, Ming Fang, Xiangke Wang
doaj   +1 more source

Laboratory dispersive EXAFS spectrometer [PDF]

, 1997
We report on a laboratory EXAFS spectrometer optimized for transmission dispersive mode. Absorption edges ranging from 6 to 20 keV can be studied. Factors determining energy range and resolution are detailed.
Lecante, P., Mosset, A., Galy, J., Burian, A., Baules, P., Burian, Andrzej, Jaud, J.   +6 more
core  

Self‐Accelerating Bimetallic Peroxide Nanozymes for Cascade‐Amplified Pyroptosis‐Immunotherapy

Advanced Science, EarlyView.
Acidic tumor microenvironment‐responsive CuZnONPs enable triple‐combination therapy via self‐supplying H2O2, cascade nanozyme activities for ROS burst, and Zn2+‐activated pyroptosis, synergizing catalytic therapy with immunotherapy to convert cold tumors into hot ones.
Xuanyi Lu, Liang Li, Siyu Pan, Yuehan Jian, Yuhan Chen, Wenjie Yang, Guang Song, Xueyang Fang, Ping'an Ma, Lijun Jiang   +9 more
wiley   +1 more source

Hyperspectral full-field quick-EXAFS imaging at the ROCK beamline for monitoring micrometre-sized heterogeneity of functional materials under process conditions

Journal of Synchrotron Radiation
Full-field transmission X-ray microscopy has been recently implemented at the hard X-ray ROCK–SOLEIL quick-EXAFS beamline, adding micrometre spatial resolution to the second time resolution characterizing the beamline.
Valérie Briois, Jean Paul Itié, Alain Polian, Andrew King, Aliou Sadia Traore, Eric Marceau, Ovidiu Ersen, Camille La Fontaine, Laurent Barthe, Anthony Beauvois, Olga Roudenko, Stéphanie Belin   +11 more
doaj   +1 more source