Results 121 to 130 of about 11,563 (263)

Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts

Scientific Reports, 2017
Potassium (K) ion-exchanged ZSM-5 zeolites were investigated for catalytic soot combustion. X-ray absorption fine-structure (XAFS), Raman, in situ IR and NH3-temperature programmed desorption (NH3-TPD) confirmed the location of K+ at the ion-exchanged ...
Chenxi Lu, Taizheng Liu, Qiaolan Shi, Qian Li, Ying Xin, Lei Zheng, Zhaoliang Zhang   +6 more
doaj   +1 more source

Is U3Ni3Sn4 best described as near a quantum critical point?

, 2003
Although most known non-Fermi liquid (NFL) materials are structurally or chemically disordered, the role of this disorder remains unclear. In particular, very few systems have been discovered that may be stoichiometric and well ordered.
Booth, C. H, De Long, L. E., Huber, J. G., Nenkov, K., Shlyk, L.   +4 more
core  

Recent advances in battery characterization using in situ XAFS, SAXS, XRD, and their combining techniques: From single scale to multiscale structure detection

Exploration
Revealing and clarifying the chemical reaction processes and mechanisms inside the batteries will bring a great help to the controllable preparation and performance modulation of batteries.
Weidong Cheng, Mengyuan Zhao, Yuecheng Lai, Xin Wang, Huanyan Liu, Peng Xiao, Guang Mo, Bin Liu, Yunpeng Liu   +8 more
doaj   +1 more source

X-ray absorption fine structure (XAFS) studies of copper compounds and complexes of biological significance

, 2014
In the present thesis, the X-ray absorption fine structure (XAFS) spectroscopy has been used to study copper compounds and complexes. Studieshave been done using both EXAFS and XANES spectroscopies. Basically, following two types of studies have been made.
openaire   +1 more source

Uranium Mineral Transport in the Peña Blanca Desert: Dissolution or Fragmentation? Simulation in Sediment Column Systems

Applied Sciences
The Sierra Peña Blanca (SPB) region in Chihuahua, Mexico contains a significant uranium deposit representing about 40% of the country’s reserves. Common uranium minerals in this area include uranophane, schoepite, and weeksite/boltwoodite, with several ...
Victoria Pérez-Reyes, Rocio M. Cabral-Lares, Jesús G. Canche-Tello, Marusia Rentería-Villalobos, Guillermo González-Sánchez, Blanca P. Carmona-Lara, Cristina Hernández-Herrera, Fabián Faudoa-Gómez, Yair Rodríguez-Guerra, Gregorio Vázquez-Olvera, Jorge Carrillo-Flores, Ignacio A. Reyes-Cortés, Daniel Hernández-Cruz, René Loredo-Portales, María E. Montero-Cabrera   +14 more
doaj   +1 more source

Asymmetric Fe–Te Pairs Enhance Peroxymonosulfate Activation via Surface‐Bound Hydroxyl Radicals Pathways

Angewandte Chemie International Edition, EarlyView.
An asymmetric Fe–Te dual‐atom pair directs peroxymonosulfate activation toward long‐lived surface‐bound hydroxyl radicals through strong p–d hybridization. The resulting electronic asymmetry enables efficient pharmaceutical degradation and reveals a metal–metalloid pairing strategy for steering reactive oxygen species pathways in advanced oxidation ...
Xuheng Li, Chunli Wang, Yuntong Sun, Sheng Wang, Min Zheng, Tierui Zhang, Jong‐Min Lee   +6 more
wiley   +1 more source

Effect of Cu incorporation in silicate and modified borate bioglass materials for health applications: insights from synchrotron-based x-ray absorption spectroscopy

Discover Materials
This contribution investigates the effect of variable copper incorporation (x = 0.2, 1.0, 2.0, and 4.0) in silicate (45 SiO2, 24.5 CaO, 24.5 Na2O, 6P2O5 wt%) and modified borate (45 B2O3, 24.5 CaO, 24.5 Na2O, 6P2O5 wt%) bioglass materials to be used for ...
N. G. Imam, Messaoud Harfouche, A. M. Abdelghany, Jan Ingo Flege   +3 more
doaj   +1 more source

Design and development of fluorescence gas detector for X-ray absorption fine structure

He jishu
BackgroundThe gas ionization chamber is a kind of intensity monitoring detector widely used in Synchrotron Radiation Facility. Lytle detector is often used to measure the fluorescence signal from the element of interest in the fluorescent mode XAFS (X ...
CHEN Yu, WANG Jiandong, PU Shijie, GAO Qian, GAN Tao, HUANG Yuying, ZHANG Shuo, LI Jiong   +7 more
doaj   +1 more source

Interfacial electronic modulation by single-atom metals in nitrogen-doped carbon on Co3O4 for acidic oxygen evolution

Nano Research Energy
Non-precious metal-based catalysts for the acidic oxygen evolution reaction (OER) offer great potential due to their continuously improving performance, earth abundance and low cost.
Zhiyi Sun, Chen Li, Zhiwei Zhao, Kun Zheng, Zhuo Chen   +4 more
doaj   +1 more source

Core–Shell Interface Effect for Boosting Selective Oxidation of Methane to Formaldehyde Over Cu/SiO2@TiO2 Catalyst

Carbon and Hydrogen, EarlyView.
The core–shell Cu/m‐SiO2@TiO2 catalyst, featuring a tailored Si–O–Ti interface, enables highly dispersed CuOx species and optimized oxygen mobility, thereby significantly enhancing formaldehyde selectivity in the selective oxidation of methane through effectively suppressing overoxidation.
Dongxu Han, Yanrong Wang, Tong Wang, Yanjun Chen, Mengyao Sun, Weiye Li, Dong Li, Ying Wang, Wenwen Ma, Zean Xie, Ying Yang, Lian Kong, Zhen Zhao   +12 more
wiley   +1 more source