Results 61 to 70 of about 21,237 (271)

Controllable sites and high-capacity immobilization of uranium in Nd2Zr2O7 pyrochlore

Journal of Synchrotron Radiation, 2022
As potential nuclear waste host matrices, two series of uranium-doped Nd2Zr2O7 nanoparticles were successfully synthesized using an optimized molten salt method in an air atmosphere.
Jian Sun, Jing Zhou, Zhiwei Hu, Ting-Shan Chan, Renduo Liu, Haisheng Yu, Linjuan Zhang, Jian-Qiang Wang   +7 more
doaj   +1 more source

In situ study of oxidation states of platinum nanoparticles on a polymer electrolyte fuel cell electrode by near ambient pressure hard X-ray photoelectron spectroscopy [PDF]

, 2017
We performed in situ hard X-ray photoelectron spectroscopy (HAXPES) measurements of the electronic states of platinum nanoparticles on the cathode electrocatalyst of a polymer electrolyte fuel cell (PEFC) using a near ambient pressure (NAP) HAXPES ...
Gabor Samjeské, Heng Wang, Liwei Yu, Mizuki Tada, Oki Sekizawa, Takahiro Nakamura, Tomoya Uruga, Toshihiko Yokoyama, Yasuhiro Iwasawa, Yasumasa Takagi, Yohei Uemura   +10 more
core   +2 more sources

In Situ Amine Formation to Modulate MOF‐Derived PdIn N‐Doped Carbon Catalysts

Advanced Materials, EarlyView.
An amine‐assisted approach converts PdIn‐MOF into PdIn intermetallic nanoparticles embedded in N‐doped carbon. In situ‐generated amines trigger early Pd nucleation, producing smaller PdIn domains than direct pyrolysis. Amine sterics and basicity tune composition and particle size, while solvent and amine co‐determine textural features.
Gonzalo Egea, Jordan Santiago Martinez, M. Asunción Molina, Jaime Mazarío, Lucy Costley‐Wood, Christian Cerezo‐Navarrete, Carlo Marini, Eduardo Villalobos‐Portillo, Andrew M. Beale, Pascual Oña‐Burgos   +9 more
wiley   +1 more source

In situ/operando plug-flow fixed-bed cell for synchrotron PXRD and XAFS investigations at high temperature, pressure, controlled gas atmosphere and ultra-fast heating

Journal of Synchrotron Radiation
A plug-flow fixed-bed cell for synchrotron powder X-ray diffraction (PXRD) and X-ray absorption fine structure (XAFS) idoneous for the study of heterogeneous catalysts at high temperature, pressure and under gas flow is designed, constructed and ...
Benjamin Bischoff, Maged F. Bekheet, Emiliano Dal Molin, Sebastian Praetz, Birgit Kanngießer, Reinhard Schomäcker, Martin Etter, Henrik S. Jeppesen, Akhil Tayal, Aleksander Gurlo, Albert Gili   +10 more
doaj   +1 more source

Polymorph‐Specific Electronic Transduction in WO3 during Molecular Sensing

Advanced Materials, EarlyView.
Metal‐oxide polymorphs with similar surface chemistry can nevertheless exhibit distinct sensing properties. In γ‐ and ε‐WO3, analyte adsorption appears comparable; yet, only ε‐WO3 induces a pronounced lattice electronic perturbation that accommodates charge in sub‐conduction band minimum states.
Matteo D'Andria, Meng Yin, Stefan Neuhauser, Vlasis G. Mavrantzas, Ying Chen, Ken Suzuki, Andreas T. Güntner   +6 more
wiley   +1 more source

Hydroxyl-Group Identification Using O K-Edge XAFS in Porous Glass Fabricated by Hydrothermal Reaction and Low-Temperature Foaming

Molecules, 2019
Porous glass was prepared by the hydrothermal reaction of sodium borosilicate glass, and oxygen-ion characterization was used to identify the hydroxyl groups in its surface area.
Masanori Suzuki, Shigehiro Maruyama, Norimasa Umesaki, Toshihiro Tanaka   +3 more
doaj   +1 more source

Nanostructured AlGaAsSb Materials for Thermophotovoltaic Solar Cells Applications

Nanomaterials, 2022
Thermophotovoltaic conversion using heat to generate electricity in photovoltaic cells based on the detraction of thermal radiation suffers from many engineering challenges.
Djamel Bensenouci, Boualem Merabet, Osman M. Ozkendir, Md A. Maleque   +3 more
doaj   +1 more source

Activating a Metallization Switch for Record Hydrogen Evolution in Single‐Atom Modified Polar MOF Piezocatalysts

Advanced Materials, EarlyView.
ABSTRACT Piezocatalytic hydrogen evolution enables the conversion of mechanical energy into chemical fuels, but its efficiency is constrained by a trade‐off between piezoelectric polarization and electronic conductivity. Strong piezoelectric polarization is essential for sufficient driving force, yet highly polar materials typically suffer from poor ...
Chongyan Hao, Xinwei Guan, Yang Wu, Lingfeng Zhu, Yiwen Mai, Thomas Frauenheim, Zhenping Fu, Yalin Lu, Shidong Wang, Hanxing Liu, Hua Hao, Shujun Zhang, Zhenxiang Cheng, Xiaoning Li   +13 more
wiley   +1 more source

Synchrotron X-ray Absorption Spectroscopy Study of Local Structure in Al-Doped BiFeO3 Powders

Nanoscale Research Letters, 2019
The Al-doped BiFeO3, i.e., BFA x O powder samples with x = 0, 0.025, 0.05, and 0.1, were prepared via the hydrothermal route. The effects of Al substitution on the structural, electrical, and optical properties of BFA x O samples were investigated. It is
Turghunjan Gholam, Li Rong Zheng, Jia Ou Wang, Hai Jie Qian, Rui Wu, Hui-Qiong Wang   +5 more
doaj   +1 more source

Counteranion-induced structural isomerization of phosphine-protected PdAu8 and PtAu8 clusters

Communications Chemistry, 2023
Controlling the geometric structures of metal clusters through structural isomerization allows for tuning of their electronic state. In this study, we successfully synthesized butterfly-motif [PdAu8(PPh3)8]2+ (PdAu8-B, B means butterfly-motif) and [PtAu8(
Yu Fujiki, Tomoki Matsuyama, Soichi Kikkawa, Jun Hirayama, Hikaru Takaya, Naoki Nakatani, Nobuhiro Yasuda, Kiyofumi Nitta, Yuichi Negishi, Seiji Yamazoe   +9 more
doaj   +1 more source