Results 61 to 70 of about 3,689 (252)

Hypergolic Copper Cluster‐Based Covalent Organic Frameworks

Advanced Science, EarlyView.
Hpergolic cluster‐based covalent organic framework (Cu3‐CB‐COF), assembled from aldehyde‐functionalized carborane monomers and trinuclear copper clusters, demonstrates a strong synergy between its catalytic copper nodes and energetic carborane backbones.
Yu‐Zhou Qiao, Cai Li, Wen‐Yang Jiao, Guoqiang Sun, Xiao‐Fei Liu, Shuang‐Quan Zang   +5 more
wiley   +1 more source

In situ photothermal catalytic cell for X-ray absorption fine structure spectroscopy measurement

Materials Today Catalysis
The burgeoning field of photothermal catalysis has garnered increasing interest due to the synergistic effects of light and thermal activation. Understanding the intrinsic reaction dynamics and structural evolution during the photothermal catalytic ...
Bingbao Mei, Di Shen, Yao Wei, Jingyuan Ma, Fanfei Sun   +4 more
doaj   +1 more source

Phase transition from fcc to bcc structure of the Cu-clusters during nanocrystallization of Fe85.2Si1B9P4Cu0.8 soft magnetic alloy

AIP Advances, 2014
A role of Cu on the nanocrystallization of an Fe85.2Si1B9P4Cu0.8 alloy was investigated by X-ray absorption fine structure (XAFS) and transmission electron microscopy (TEM). The Cu K-edge XAFS results show that local structure around Cu is disordered for
Masahiko Nishijima, Makoto Matsuura, Kana Takenaka, Akira Takeuchi, Hironori Ofuchi, Akihiro Makino   +5 more
doaj   +1 more source

Arsenic species in weathering mine tailings and biogenic solids at the Lava Cap Mine Superfund Site, Nevada City, CA

Geochemical Transactions, 2011
Background A realistic estimation of the health risk of human exposure to solid-phase arsenic (As) derived from historic mining operations is a major challenge to redevelopment of California's famed "Mother Lode" region.
Ashley Roger P, Foster Andrea L, Rytuba James J   +2 more
doaj   +1 more source

Laser Preset of MnOx Layer on High‐Entropy Alloy Surface for Ampere‐Level Ultra‐Stable OER Performance

Advanced Science, EarlyView.
3D printing enables a high entropy alloy‐derived, in situ formed MnOx overlayer that suppresses oxidation–reconstruction and mitigates anodic dissolution, while enhancing electrolyte wetting and bubble release to accelerate interfacial mass transport and OER kinetics.
Benzhi Wang, Ziyang Duan, Jeong Yeon Heo, Thu Ha Le, Byunggon Song, Sunhyeong Kwon, Ji Hoon Lee, Jonghwan Suhr, Hyung Mo Jeong   +8 more
wiley   +1 more source

Cobalt Single‐Atom Nanozyme for Enhanced Intestinal Radioprotection and Tumor Radiosensitization via Bidirectional ROS Modulation

Advanced Science, EarlyView.
Orally administered, pH‐responsive Co‐SAN exerts dual functions: in the alkaline intestinal milieu, it scavenges reactive oxygen species (ROS) and suppresses the PI3K/AKT pathway and NETs formation, thus providing radioprotection; whereas in the acidic tumor microenvironment, it generates ROS and alleviates hypoxia, thereby enhancing radiosensitization.
Shengqi Yin, Junjie Li, Yishu Zou, Yang Liu, Yilin Zheng, Lu Yu, Wanying Zheng, Yajun Zou, Zehui Zhang, Tao Li, Peiqun Yin, Jianlin Zhang, Yuen Wu, Yi Ding   +13 more
wiley   +1 more source

Two‐Dimensional Quaternary Alloys of (RuMoVNb)Se2 for Superior Hydrogen Evolution Reaction Catalysis

Advanced Science, EarlyView.
Composition‐tuned (RuMoVNb)Se2 quaternary alloy nanosheets are synthesized via colloidal reactions. Incorporation of Ru into (MoVNb)Se2 ternary alloys results in more metallic electronic structures and significantly enhances their electrocatalytic activity for the hydrogen evolution reaction (HER) under alkaline, acidic, and neutral conditions.
Junaid Ihsan, Ju Yeon Kim, Irtiqa Mishal, Jun Hyeok Choi, Jeong Eun An, Youn Jun Choi, Doyeon Kim, In Hye Kwak, Gianvito Vilé, Ik Seon Kwon, Hong Seok Kang, Jeunghee Park   +11 more
wiley   +1 more source

Vanadium Cation Exchange‐Driven Reconstruction of MOF‐Derived Cobalt Hydroxide Electrodes for Electrocatalysis and Energy Storage

Advanced Science, EarlyView.
A room‐temperature vanadium cation exchange strategy is developed to achieve simultaneous structural reconstruction and electronic/defect modulation of ZIF‐67 on nickel foam. The resulting mesoporous V20–Co(OH)2 electrode exhibits superior OER activity with low overpotentials and enhanced lattice oxygen participation.
Yongbeen Kim, Seungwoo Han, Wonyoung Lee
wiley   +1 more source

Thermodynamic Properties and Anharmonic Effects in XAFS Based on Anharmonic Correlated Debye Model Debye–Waller Factors

Advances in Materials Science and Engineering, 2018
Thermodynamic properties and anharmonic effects in X-ray absorption fine structure (XAFS) have been studied based on the anharmonic correlated Debye model Debye–Waller factors presented in terms of cumulant expansion.
Nguyen Ba Duc, Nguyen Van Hung, Ha Dang Khoa, Dinh Quoc Vuong, Tong Sy Tien   +4 more
doaj   +1 more source

Advanced X-ray absorption spectroscopy for probing dynamics in CO2 reduction reaction electrocatalysts

Communications Materials
Electrochemical CO2 conversion to value-added fuels presents an appealing avenue to realize low-carbon footprint. However, achieving sustainable energy conversion hinges on a comprehensive analysis of the catalyst surface-interface. X-ray Absorption Fine
Beibei Sheng, Dengfeng Cao, Shuangming Chen, Nan Zhang, Jianqiang Wang, Li Song   +5 more
doaj   +1 more source