Results 151 to 160 of about 425 (216)

Bifunctional Electrocatalysts in Rechargeable Lithium‐Gas Batteries: Material Evolution and Mechanistic Insights from Metal‐Free Carbons to Carbon‐Supported Single‐Atom Sites

Small, EarlyView.
This review charts the material evolution of bifunctional electrocatalysts for rechargeable lithium‐gas batteries. It highlights the journey from heteroatom‐doped, metal‐free carbon architectures to precision‐engineered carbon‐supported single‐atom sites. The discussion focuses on mechanistic insights into how these catalysts govern reversible O2, CO2,
Daming Ren, Shuimei Chen, Yuzheng Wu, Xiaodan Huang, Jong Beom Baek, Ashok Kumar Nanjundan   +5 more
wiley   +1 more source

Manganese Oxide Catalysts for Lithium–Oxygen Batteries: Structures, Mechanisms, and Reaction Pathway Engineering

Small, EarlyView.
How do the morphologies, crystal structures, and electronic properties of manganese oxides influence oxygen reaction pathways in lithium–oxygen batteries (LOBs)? This review systematically summarizes structure‐dependent catalytic mechanisms and recent engineering strategies, highlighting how defect engineering, compositional modulation, and reaction ...
Ruiqin Peng, Linna Dai, Karol Viviana Mejia‐Centeno, Malik Dilshad Khan, Guifang Zeng, Yanhong Tian, Andreu Cabot, Qing Sun   +7 more
wiley   +1 more source

A New Electrode Paradigm Enabled by Co‐Axial Electrospinning

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Co‐axial electrospinning creates fuel‐cell electrodes with a division of function: ionomer cores to conduct protons and tailored catalyst‐containing shells for electrochemical reactions. This separation allows a paradigm shift in materials design and functional properties for the core and shell ionomers, targeting chemistries to be tuned independently ...
Kaustubh Khedekar, Yu Pei, Paul Abi, Carlos Baez‐Cotto, Timothy Van Cleve, David A. Cullen, Kenneth C. Neyerlin   +6 more
wiley   +1 more source

Porous Organic Polymers: From Molecular Design to Scalable Technologies

Small, EarlyView.
This review introduces porous organic polymers (POPs) for a wide range of applications, including energy storage, gas adsorption, catalysts, adsorbents, biomedical applications, sensors, and other exciting fields, and critically analyzes the synthesis and modification, and how structural topology influences the composites' architecture of POPs, along ...
Hossein Mashhadimoslem, Hadi Shayesteh, Simindokht Zarei‐Shokat, Rokhsareh Bakhtiari, Sheyda Abedi‐Banaei, Zahra Sheikhlouiharzand, Parnia Mohebimanesh, Seyed Mohammad Amin Ojagh, Bahareh Bakhtiari, Ali Maleki, Theo G. M. van de Ven, Sohrab Zendehboudi, Ali Elkamel   +12 more
wiley   +1 more source

Discussion on Hollow-Cathode Effect

IEEJ Transactions on Fundamentals and Materials, 1976
openaire   +2 more sources

Magneto‐Electrodeposition and Field‐Enhanced Ion Transport in Zn‐MnO2 Batteries

Small, EarlyView.
Magneto‐electrodeposition (MED) strategy to improve the deposition uniformity and subsequent performance of MnO2 cathodes for aqueous Zn‐MnO2 batteries. Internal magnetic fields operating during battery cycling stabilize Zn anode and promote enhanced ion transportation, leading to enhanced initial areal capacities.
Pedaballi Sireesha, William T. McLeod, Kaylie A. McCracken, Jeffrey G. Bell   +3 more
wiley   +1 more source

Reconfiguration of Localized Ruthenium Surface via Incorporating Single Platinum Atoms for Favorable Hydrogen Oxidation Catalysis

Small, EarlyView.
The introduction of a Pt single atom changes the Ru surface structure and results in the reconstruction of the active sites for hydrogen and CO oxidation catalysis. With a Pt loading of only 1 wt.%, RuPtSA exhibited superior HOR activity and resistance to impurities compared to commercial Pt catalysts in both acid and alkaline electrolytes.
Daeil Choi, Dong Wook Lee, Hochang Song, Seung‐hoon Kim, Dohoon Kim, Jongkyung Ryu, Jue‐Hyuk Jang, Sungyong Cho, Sungchul Lee, Segeun Jang, Hyung Chul Ham, Sung Jong Yoo   +11 more
wiley   +1 more source

Rational Design of LiNi1‐xFexO2 Electrodes for Enhanced Oxygen Evolution Reaction Under Power‐Fluctuating Operations in Alkaline Water Electrolysis

Small Methods, EarlyView.
We develop Fe‐incorporated LiNiO2 for the OER in alkaline media, where Fe enhances Ni3+ oxidation state and optimizes eg orbital filling, significantly improving activity under power fluctuations. ABSTRACT The electrochemical performance of alkaline water electrolyzers is hindered by power fluctuations when integrated with renewable energy sources in ...
Younghan Jung, Asiya M. Tamboli, Sowon Kim, Wan Sik Kim, Sathya Sheela Subramanian, Sejin Im, Junseok Sim, Junseok Oh, Geun Ho Gu, Chang‐Hee Kim   +9 more
wiley   +1 more source

Effective Equilibrium Reaction Zone Modeling of Hydrogen Plasma Smelting Reduction: A Scenario Analysis

steel research international, EarlyView.
The study presents a dynamic zonal model for hydrogen plasma smelting reduction (HPSR) in direct current arc furnaces, predicting time‐dependent behavior of metal, slag, and off‐gas. The study considers various industrial scenarios to quantify energy demand, hydrogen utilization, degree of reduction, and other operational sensitivities.
Tristan K. Wickham, Stephanus P. Du Preez, Dmitri G. Bessarabov, Stephan C. Louw, Ernst L. J. Kleynhans   +4 more
wiley   +1 more source

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Physical Processes in Hollow Cathodes

AIAA Journal, 1976
Hollow cathodes with cavity diameters of 1.9 cm have been operated in an MPD arc configuration at discharge currents from 0.25 kA to 30 kA. Current and potential distributions, measured with probes in the cathode cavity, show that a spontaneous mode of hollow cathode operation, wherein the current distribution penetrates upstream into the cavity, has ...
M. KRISHNAN, R. JAHN, W. VON JASKOWSKY, K. CLARK   +3 more
openaire   +1 more source