Results 1 to 10 of about 223,254 (267)

Nanofiber-Based Oxygen Reduction Electrocatalysts with Improved Mass Transfer Kinetics in a Meso-Porous Structure and Enhanced Reaction Kinetics by Confined Fe and Fe3C Particles for Anion-Exchange Membrane Fuel Cells

open access: yesEnergies, 2022
The development of high-performance nonprecious metal catalysts for oxygen reduction reactions is critical for the commercialization of fuel cells. In this paper, we report a non-precious catalyst with high-performance, in which Fe and Fe3C is embedded ...
Wenzhe Luo   +6 more
doaj   +1 more source

Experimental Study on Critical Membrane Water Content of Proton Exchange Membrane Fuel Cells for Cold Storage at −50 °C

open access: yesEnergies, 2021
Membrane water content is of vital importance to the freezing durability of proton exchange membrane fuel cells (PEMFCs). Excessive water freezing could cause irreversible degradation to the cell components and deteriorate the cell performance and ...
Xiaokang Yang   +7 more
doaj   +1 more source

Novel Nafion/Graphitic Carbon Nitride Nanosheets Composite Membrane for Steam Electrolysis at 110 °C

open access: yesMembranes, 2023
Hydrogen is expected to have an important role in future energy systems; however, further research is required to ensure the commercial viability of hydrogen generation.
Taipu Chen   +4 more
doaj   +1 more source

Self-Supporting NiFe Layered Double Hydroxide “Nanoflower” Cluster Anode Electrode for an Efficient Alkaline Anion Exchange Membrane Water Electrolyzer

open access: yesEnergies, 2022
The development of an efficient and durable oxygen evolution reaction (OER) electrode is needed to solve the bottleneck in the application of an anion exchange membrane water electrolyzer (AEMWE).
Dandan Guo   +4 more
doaj   +1 more source

Hydrogen Production by Water Electrolysis: Progress and Suggestions

open access: yes中国工程科学, 2021
The increasing demand for carbon emission reduction has drawn wide attention on the green hydrogen-manufacturing technology. Hydrogen production by water electrolysis based on renewable energies has the lowest carbon emission among the main hydrogen ...
Yu Hongmei   +5 more
doaj   +1 more source

Optimization and Comparative Economic Analysis of Standalone and Grid-Connected Hybrid Renewable Energy System for Remote Location

open access: yesFrontiers in Energy Research, 2021
Due to rising population growth and economic development, there is indeed a growing demand for electricity. Both in aspects of generation and transmission, conventional power firms are striving to manage these demands.
Siddharth Jain, Yashwant Sawle
doaj   +1 more source

The Power of Hybrid Acceleration [PDF]

open access: yes, 2006
This paper addresses the problem of computing symbolically the set of reachable configurations of a linear hybrid automaton. A solution proposed in earlier work consists in exploring the reachable configurations using an acceleration operator for computing the iterated effect of selected control cycles.
Boigelot, Bernard   +1 more
openaire   +3 more sources

The Power of the Hybrid Model for Mean Estimation [PDF]

open access: yesProceedings on Privacy Enhancing Technologies, 2020
Abstract We explore the power of the hybrid model of differential privacy (DP), in which some users desire the guarantees of the local model of DP and others are content with receiving the trusted-curator model guarantees. In particular, we study the utility of hybrid model estimators that compute the mean of arbitrary realvalued ...
Brendan Avent   +2 more
openaire   +2 more sources

Integration and Flight Test of a 7 kW Turboelectric Vertical Take-Off and Landing Unmanned Aircraft

open access: yesApplied Sciences, 2022
This paper evaluates the performance and practical challenges associated with fabricating and flight testing an unmanned aircraft powered by a turboelectric system based on a 7 kW turbine engine.
Joshua Johnsen   +4 more
doaj   +1 more source

Multi-objective optimal scheduling strategy for wind power, PV and pumped storage plant in VSC-HVDC grid

open access: yesThe Journal of Engineering, 2019
Zhangbei demonstration project will be the world's highest voltage level and largest capacity VSC-HVDC power grid, by which millions of kilowatts of renewable energy and pumped storage power will be supplied to Beijing.
Man Xu, Linlin Wu, Hui Liu, Xiao Wang
doaj   +1 more source

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