Results 71 to 80 of about 24,322,276 (145)

Gradient p‐p Orbital Hybridization in Bismuth‐Doped Crystalline Carbon Nitride for Dual‐Functional Carbon‐to‐Carbon Valorization

EcoEnergy, EarlyView.
Schematic illustration comparing the charge transfer dynamics and catalytic reaction over the (left) pristine carbon nitride and (right) Bi‐doped carbon nitride photocatalysts. In the pristine system, random charge diffusion and rapid recombination limit catalytic efficiency. In contrast, the Bi‐doped system establishes a robust internal electric field
Joel Jie Foo, Valerine Khoo, Zi‐Jing Chiah, Sue‐Faye Ng, Xianhai Zeng, Wee‐Jun Ong   +5 more
wiley   +1 more source

A Novel SoC Feedback Control of ESS for Frequency Regulation of Fractional Frequency Transmission System with Offshore Wind Power

, 2017
International audienceThe impact of high penetration of Renewable Energy Source (RES) and the decoupled power-frequency relationship raise the concern for RES participating in the grid frequency regulation.
Zhao, Boyang, Pierre Haessig, Xifan Wang, Wang, Xifan, Boyang Zhao, Haessig, Pierre   +5 more
core   +1 more source

Asymmetric Dual‐Electron Bridge Via Gradient Orbital Coupling for Robust Alkaline Oxygen Evolution in Low‐Iridium Water Electrolysis

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The engineered IrOx/FeEu‐NiTex composite, with ultralow Eu (0.72 at%) and Ir (0.14 at%) content, harnesses an asymmetric dual‐electron‐bridge structure (Ni 3d–O 2p–Eu 4f, Ni 3d–O 2p–Ir 5d) for gradient orbital coupling. This unique architecture delivers superior and robust alkaline oxygen evolution activity, enabling efficient low‐iridium water ...
Guiling Wu, Qianlin Chen, Feng Wang, Yan Zhao, Zhaoyang Wang   +4 more
wiley   +1 more source

Enhanced Contribution of Biexciton‐Mediated Decay Kinetics in Perovskite Nanocrystals Via Sequential Ultrafast Excitation

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Sequential ultrafast excitation is shown to increase the relative kinetic weighting of biexciton‐mediated decay in CsPbBr3 nanocrystals without increasing the total excitation fluence. By temporally structuring excitation within the exciton lifetime, the early‐time fast decay contribution becomes more pronounced while the fitted fast decay constants ...
Lijie Wang, Renqian Zhou, Malte Oppermann, Xi Zhang, Jianxin Wang, Jun Yin, Osman M. Bakr, Majed Chergui, Omar F. Mohammed   +8 more
wiley   +1 more source

Oxygen Vacancy‐Rich S‐Scheme Heterojunction Photocatalyst With Enhanced Interfacial Charge Transfer for Round‐the‐Clock Formaldehyde Degradation

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This work addresses the critical challenges of severe charge recombination and the dependence on constant light illumination in photocatalysis. We propose a strategy centered on an oxygen vacancy‐rich S‐scheme heterojunction, which enables precise regulation of charge carrier behavior and achieves long‐lasting photocatalytic performance.
Xuechuan Wang, Zhi Zhao, Xiaoyu Guan, Ji Li, Chuanyin Xiong, Taotao Qiang, Qingxin Han   +6 more
wiley   +1 more source

Fractional robust control of ligthly damped systems [PDF]

, 2006
The article proposes a method to design a robust controller ensuring the damping ratio of a closed-loop control. The method uses a contour para-meterized by the damping ratio in the Nichols plane and the complex non-integer (or fractional)differentiation
Janat, Yaman, Oustaloup, Alain, Pommier-Budinger, Valérie, Lanusse, Patrick   +3 more
core  

A fractional-N frequency synthesizer-based multi-standard I/Q carrier generation system in0.13μm CMOS

, 2011
This paper proposes a sigma- delta fractional-N frequency synthesizer-based multi-standard I/Q carrier generation system. With reasonable frequency planning, the system can be used in multi-standard wireless communication applications(GSM, WCDMA, GPRS ...
Peng Feng, Lou, Wenfeng, Wu, N.(nanjian@semi.ac.cn), Zhiqing Geng, Wu, Nanjian, Geng, Zhiqing, Wenfeng Lou, Nanjian Wu, Feng, Peng   +8 more
core   +1 more source

Cobalt Single‐Atom Sites Engineered in Poly(Heptazine Imide) Photocathodes as Benchmark for Alkaline Hydrogen Evolution: A Comparative Transition Metal Study

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Cobalt single‐atoms in poly(heptazine imide) photocathodes maximize active‐site availability and outperform Fe, Cu, and Na in alkaline hydrogen evolution. Atomic precision (not bulk loading) proves predominance, establishing a design principle for the next generation of solar fuel devices.
Izadora F. Reis, Gabriel A. A. Diab, Sachin Nenaniya, Marcos A. R. da Silva, Rayse M. Ferreira, Heer Shah, Geraldo M. G. da Silva, Andreas Hutzler, Mark Isaacs, Christian W. Lopes, Ivo F. Teixeira, Pablo Jiménez‐Calvo   +11 more
wiley   +1 more source

Insights into Degradation Mechanisms and Optimization Strategies for High‐Voltage High‐Ni Cathode Materials

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This review comprehensively unravels the atomic‐scale degradation mechanisms of high‐voltage high‐nickel cathodes, highlighting the critical O3 to O1 phase transition and chemo‐mechanical failures. By correlating synthetic modulations with structural stability, it critically evaluates advanced optimization strategies, including single‐crystallization ...
Mukhtiar Hussain, Guoxiang Zhou, Shibin Yang, Zongyu Sun, Feixiang Ding, Xiao Zhang, Chaojiang Niu   +6 more
wiley   +1 more source

Frequency domain analysis of a fractional derivative SDOF system

, 2005
This paper presents a study of the frequency domain behaviour of a single degree of freedom (SDOF) system with a fractional derivative model, named Fractional Kelvin-Voigt.
SORRENTINO, Silvio, L. Garibaldi, SORRENTINO S, Luigi Garibaldi, Silvio Sorrentino, GARIBALDI, Luigi   +5 more
core   +1 more source