Results 31 to 40 of about 2,054,129 (286)

F127 Assisted Synthesis of Tri-(Fe/F/N)-doped Porous Carbons with a High Density of Fe3C and Fe-N4 Catalytic Sites as Efficient Electrocatalysts for ORR

open access: yesInternational Journal of Electrochemical Science, 2021
Because of the slow reaction rate of the oxygen reduction reaction (ORR), high-performance catalysts are needed to accelerate the reaction. However, platinum (Pt)-based electrocatalysts have the shortcomings of high cost and poor stability.
Kai Niu   +10 more
doaj   +1 more source

Development of low cost thermal insulating materials [PDF]

open access: yes, 2005
Includes bibliographical references.The disadvantaged people in South Africa are unfortunate by virtue of their financial status. It was estimated in 1992 that 20 % of the South African population live in informal settlements.
Meletse, Thabo Frans
core   +1 more source

Core-shell structured silk Fibroin/PVDF piezoelectric nanofibers for energy harvesting and self-powered sensing

open access: yesNano Materials Science, 2022
The development of wearable and portable electronics calls for flexible piezoelectric materials to fabricate self-powered devices. However, a big challenge in piezoelectric material design is to boost the output performance while ensuring its flexibility
Siqi Wang   +6 more
doaj   +1 more source

The investigation of expanded polystyrene creep behaviour

open access: yesMATEC Web of Conferences, 2017
The results obtained in long-term testing under constant compressive stress of the cut from the Slabs EPS 50/100 and EPS 150 with the density ranging from 15 to 24 kg/m3, which were manufactured by the same manufacturer by foaming EPS solid granules ...
Zhukov Aleksey   +3 more
doaj   +1 more source

High Conduction Band Inorganic Layers for Distinct Enhancement of Electrical Energy Storage in Polymer Nanocomposites

open access: yesNano-Micro Letters, 2022
Dielectric polymer nanocomposites are considered as one of the most promising candidates for high-power-density electrical energy storage applications.
Yingke Zhu   +6 more
doaj   +1 more source

Thermal-oxidative degradation behavior and process of vulcanized styrene-butadiene rubber

open access: yesHecheng xiangjiao gongye, 2021
The thermal oxidative degradation behavior and process of vulcanized styrene-butadiene rubber (SBR) at high temperature was studied by the sol-gel analysis, equilibrium swelling method, Fourier transform infrared spectroscopy coupled with mass ...
ZHANG Zhen; MA Lan; FANG Jia-yi; WANG Shi-feng
doaj   +1 more source

The effect of carbon and polypropylene fibers on thermal shock resistance of the refractory castable

open access: yesJournal of Civil Engineering and Management, 2017
This work investigates medium cement refractory castable with additives of carbon and polypropylene fibers. The peculiarities of microstructure changes in the fiber and castable matrix contact zone, channel formation, and changes of cold crushing ...
Valentin Antonovič   +4 more
doaj   +1 more source

Rational Materials and Structure Design for Improving the Performance and Durability of High Temperature Proton Exchange Membranes (HT‐PEMs)

open access: yesAdvanced Science, 2023
Hydrogen energy as the next‐generation clean energy carrier has attracted the attention of both academic and industrial fields. A key limit in the current stage is the operation temperature of hydrogen fuel cells, which lies in the slow development of ...
Jingnan Song   +13 more
doaj   +1 more source

A study of heat transfer through clothing assemblies [PDF]

open access: yes, 1989
The work presented in this thesis is devoted to further understanding heat transfer through clothing under different circumstances, in order to provide guidelines for the design and construction of clothing with regard to thermal comfort.
Fan, Jintu, Fan, J
core   +4 more sources

N, F-Codoped Microporous Carbon Nanofibers as Efficient Metal-Free Electrocatalysts for ORR

open access: yesNano-Micro Letters, 2019
Currently, the oxygen reduction reaction (ORR) mainly depends on precious metal platinum (Pt) catalysts. However, Pt-based catalysts have several shortcomings, such as high cost, scarcity, and poor long-term stability. Therefore, development of efficient
Tianle Gong   +4 more
doaj   +1 more source

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