Results 51 to 60 of about 28,295 (284)

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

Advanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He, Minxian Zhang, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +5 more
wiley   +1 more source

Deciphering the Local Environment of Electrocatalytic Metal Sites with X‐ray Absorption Fine Structure

Small Structures
Electrocatalysis plays a pivotal role in energy conversion and holds significant promise for the development of new energy sources. Understanding the intricate atomic‐level interplay between active sites and electrocatalytic activity is essential for ...
Nan Zhang, Jianqiang Wang
doaj   +1 more source

Decoupling the metal insulator transition and crystal field effects of VO2

Scientific Reports, 2021
VO2 is a highly correlated electron system which has a metal-to-insulator transition (MIT) with a dramatic change of conductivity accompanied by a first-order structural phase transition (SPT) near room temperature.
In-Hui Hwang, Chang-In Park, Sunmog Yeo, Cheng-Jun Sun, Sang-Wook Han   +4 more
doaj   +1 more source

Identification of single-site gold catalysis in acetylene hydrochlorination [PDF]

, 2017
There remains considerable debate over the active form of gold under operating conditions of a recently validated gold catalyst for acetylene hydrochlorination.
Catlow, C. Richard A., Davies, Catherine J., Dawson, Simon, Freakley, Simon J., Gibson, Emma K., Hutchings, Graham J., Johnston, Peter, Jones, Wilm, Kiely, Christopher J., Kondrat, Simon A., Lu, Li, Malta, Grazia, Morgan, David J., Thetford, Adam, Wells, Peter P.   +14 more
core   +4 more sources

XAFS spectra from reflectivity measurements

Journal of Synchrotron Radiation, 1998
The reflectivity of TiSi2 films was measured as a function of photon energy E at the Ti K-edge region at a glancing angle θ close to the critical angle θ C of total reflection. TiSi2 silicide films (about 30 nm thickness) were prepared by silicidation of Ti thin films deposited on Si(001) substrates.
K, Tani, T, Nanjyo, S, Masui, H, Saisho
openaire   +2 more sources

Facet‐Engineered S‐Scheme Heterostructure With Enhanced Active Sites for Efficient Photocatalytic Degradation of Organic Contaminants

Advanced Functional Materials, EarlyView.
The facet‐engineered ZnO/Zn3In2S6 heterostructure, dominated by {001} plane coupling, exposes abundant unsaturated Zn sites with elongated Zn─O bonds, directing photoexcited charge carriers along an S‐scheme pathway and suppressing recombination. Enhanced interfacial Zn adsorption toward bisphenol A and methylene blue further synergistically promotes ...
Yang Yang, Zisheng Du, Hongyuan Yang, Debabrata Bagchi, Ruotao Yang, Prashanth W. Menezes, Sugang Meng   +6 more
wiley   +1 more source

Characterization of Elemental Composition and Valence State of Cyclone-collected Aerosol Particles Using EDXRF and XAFS at Three Sites in Japan

Asian Journal of Atmospheric Environment, 2023
The valence state and concentration of metallic pollutants are important factors contributing to the health effects of respirable particulate matter (PM); however, they have not been well studied.
Weidong Jing, Katsutomo Saito, Takuma Okamoto, Hibiki Saito, Kazuki Sugimoto, Chiharu Nishita-Hara, Keiichiro Hara, Masahiko Hayashi, Shuichi Hasegawa, Tomoaki Okuda   +9 more
doaj   +1 more source

Generating Mechanism of Catalytic Effect for Hydrogen Absorption/Desorption Reactions in NaAlH₄–TiCl₃

Applied Sciences, 2021
The hydrogen desorption and absorption reactions of the complex metal hydride NaAlH4 are disproportionation processes, and the kinetics can be improved by adding a few mol% of Ti compounds, although the catalytic mechanism, including the location and ...
Kazutaka Ikeda, Fumika Fujisaki, Toshiya Otomo, Hidetoshi Ohshita, Takashi Honda, Toru Kawamata, Hiroshi Arima, Kazumasa Sugiyama, Hitoshi Abe, Hyunjeong Kim, Kouji Sakaki, Yumiko Nakamura, Akihiko Machida, Toyoto Sato, Shigeyuki Takagi, Shin-ichi Orimo   +15 more
doaj   +1 more source

Structural behaviour of copper chloride catalysts during the chlorination of CO to phosgene [PDF]

, 2018
The interaction of CO with an attapulgite-supported Cu(II)Cl2 catalyst has been examined in a micro-reactor arrangement. CO exposure to the dried, as-received catalyst at elevated temperatures leads to the formation of CO2 as the only identifiable ...
Callison, June, Davies, Philip R., Gibson, Emma K., Guan, Shaoliang, Lennon, David, Rossi, Giovanni E., Wells, Peter P., Willock, David J., Winfield, John M.   +8 more
core   +2 more sources

Electrocatalytic Reduction of CO2 to Ethylene: Catalyst Design and Synchrotron‐Based Characterizations

Advanced Functional Materials, EarlyView.
This review evaluates strategies for electrochemical CO2 reduction to ethylene, focusing on copper‐based catalyst design and microenvironment modulation to achieve industrial‐grade performance. By leveraging operando synchrotron‐based characterizations, we provide a multiscale understanding of dynamic structural transformations and key reaction ...
Meng Zhang, Zuolong Chen, Yimin A. Wu
wiley   +1 more source