نتایج جستجو برای: cathode catalyst layer
تعداد نتایج: 337726 فیلتر نتایج به سال:
Low-temperature water electrolysis using an anion conductive polymer electrolyte has several potential advantages over other technologies, however, the fabrication of durable alkaline electrodes remains a challenge. Detachment catalysts results in loss electrochemical surface area. Simple mixtures ionomer and catalyst can suffer from poor adhesion because only physical is used to bind component...
Microbial electrosynthesis, an artificial form of photosynthesis, can efficiently convert carbon dioxide into organic commodities; however, this process has only previously been demonstrated in reactors that have features likely to be a barrier to scale-up. Therefore, the possibility of simplifying reactor design by both eliminating potentiostatic control of the cathode and removing the membran...
Li2O2, as the discharge product of Li-O2 batteries on cathode, is difficult to be electrochemically decomposed, which will lead short cycling lifespan batteries. In this study, battery was prolonged significantly by an efficient bifunctional catalyst. The Ni and N co-doped carbon nanotubes (NiNCs) were synthesized firstly, then RuO2 nanoparticles deposited NiNCs a hydrothermal route synthesize ...
The solar-driven electrochemical reduction of CO2 to fuels and chemicals provides a promising way for closing the anthropogenic carbon cycle. However, the lack of selective and Earth-abundant catalysts able to achieve the desired transformation reactions in an aqueous matrix presents a substantial impediment as of today. Here we introduce atomic layer deposition of SnO2 on CuO nanowires as a me...
Organic solar cells (OSCs) as the third generation photovoltaic devices have drawn intense research, for their ability to be easily deposited by low-cost solution coating technologies. However the cathode in conventional OSCs, Ca, can be only deposited by thermal evaporation and is highly unstable in ambient. Therefore various solution processible cathode buffer layers (CBLs) are synthesized as...
We are currently constructing a new X-ray absorption fine structure (XAFS) beamline BL36XU at SPring-8 dedicated for the structural and electronic analysis of the dynamic events on polymer electrolyte fuel cell (PEFC) cathode catalysts for the development of next-generation PEFCs. To investigate the cathode catalyst nanoparticles in PEFCs under the operating conditions, the beamline is designed...
A high surface area and micro process integrated cathode for μ-DMFC is introduced in this study. CNTs growth inside micro structured cathode for catalyst support was employed for reaction surface increment, while liquid Nafion spun into radial arranged micro reaction holes controlled by centrifugal force was carried out to provide proper immersion ratio of CNTs in Nafion. The process is all int...
In this paper, a non-isothermal two-phase flow in the cathode gas diffusion layer (GDL) of PEM fuel cell is modeled. The governing equations including energy, mass and momentum conservation equations are solved by numerical methods. Also, the optimal values of the effective parameters such as the electrodes porosity, gas diffusion layer (GDL) thickness and inlet relative humidity are calculated...
In this paper, a three-dimensional, complex seepage model of a proton exchange membrane fuel cell (PEMFC) is studied, the corresponding finite element method and numerical simulation are given as well, where species transport, fluid flow, charge transport, heat transfer and electrochemical reaction in the PEMFC are simultaneously addressed. The domain to be studied includes porous gas diffusion...
nt matter & 2013 0.1016/j.nanoen.2 thor. Tel.: +82 54 . nt_tiw123@yahoo Abstract Continuous growth in global energy demand has sparked concerns about energy security and environmental sustainability. In the past two decades, attempts have been made in the development of innovative energy technologies. The direct methanol fuel cell (DMFC) is among the most promising alternative energy sources fo...
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