نتایج جستجو برای: pt extraction
تعداد نتایج: 211741 فیلتر نتایج به سال:
SYNOPSIS OF RECOMMENDATIONS: The Italian Society for Thrombosis and Haemostasis (SISET: Società Italiana per lo Studio dell' Emostasi e della Trombosi) promoted the development of a series of guidelines which would adopt evidence-based medicine methodology on clinically relevant problems in the field of haemostasis and thrombosis. The objective of the present guidelines is to provide recommenda...
روش شبیهسازی دینامیک مولکولی دراین کار پژوهشی برای برسی خواص گرمایی آلیاژ نامنظم pt-x%ni (x درصد) در بازه ی دمایی 50 کلوین تا نقطه ذوب بکار گرفته شد. برای محاسبه انرژی برهمکنشی و نیروی وارد بر ذرات پلاتین و نیکل از پتانسیل ساتن- چن کوانتومی استفاده کرده ایم. با این تکنیک تغییرات دمای ذوب آلیاژ با تغییر درصد اتمهای نیکل بررسی شد. ع?وه بر آن، کمیتهای انرژی بستگی، گرمای نهان ذوب، ضریب انبساط حجمی،...
hydrogenation reaction with n-heptane on pt/al2o3 catalyst was investigated under the steady state condition in a fixed bed reactor. the catalyst was prepared under a variety of conditions, but the one chosen was non-acidic that is not considered a hydrocracking catalyst. the main objective was to vary the selectivity of n-heptane as a function of reaction variables especially the partial press...
In this work, the electrocatalytic oxidation of ethanol was studied in acidic media at the wholly electrosynthesized nanocomposites: platinum and its alloys (copper and nickel) anoparticles/reduced graphene oxide on the carbon-ceramic electrode (Pt/rGO/CCE, Pt-Cu/rGO/CCE, and Pt-Ni/rGO/CCE electrocatalysts). The electrosynthesized nanocomposites were characterized by scan...
Photoexcited metals can produce highly-energetic hot carriers whose controlled generation and extraction is a promising avenue for technological applications. While carrier dynamics in Au-group have been widely investigated, microscopic description of the photoexcited mid-infrared near-infrared Pt-group range still scarce. Since these materials are used catalysis and, more recently, plasmonic c...
In the present work, the electrooxidation of formic acid and formaldehyde; potentially important fuels for future fuel cells, was investigated on the Fe3O4@Pt core-shell nanoparticles/carbon-ceramic electrode (Fe3O4@Pt/CCE). The Fe3O4@Pt nanoparticles were prepared via a simple and fast chemical method and their surface morph...
In this study, the effect of platinum-aluminide coating parameters on surface roughness of nickel-based superalloy Rene®80 was evaluated. For this purpose, different thicknesses of Pt-layer (2, 4, 6 and 8µm) were plated on the Samples. Then diffusion aluminide coating in two types, high tempeature-low activity and low temperature-high activity was performed. The results of structural investigat...
In this work, NdFeO3 nanoparticles were synthesized through a simple co-precipitation method. The formation of NdFeO3 particles was verified by X-ray powder diffraction, infrared spectroscopy, vibrating sample magnetometer, and transmission electron microscopy analysis. Polyaniline and chitosan were employed as proper support for production of metal nanoparticles. Novel Pt...
Morphology and size of platinum nanoparticles are a crucial factor in improving their catalytic activity and stability. Here, we firstly report the synthesis of high loading Pt nanoparticles on polydopamine reduced Graphene. The loading concentration of Pt (nanoparticles) NPs on Graphene can be adjusted in the range of 60-70%.With the insertion of polydopamine between Graphene oxide sheets, sta...
copper extraction from heap 3 low grade ore at sarchechmeh is limited due to its mixed composition (copper oxide and sulphide minerals). changing this heap to a bioheap could improve the copper recovery.
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