Catalytic Performance of Pd Nanoparticles Obtained by Direct Reduction in Cellulose–Poly(ferrocenylsilane) Hybrid Sponges

SrFeO3-δ Assisting with Pd Nanoparticles on the Performance of Alcohols Catalytic Oxidation

Current catalysts for the alcohol oxidation in fuel cells (typically noble metals-based) are susceptible to poisoning with intermediates like CO. Hence we decided to find superseded catalysts for methanol oxidation based on incorporation of mixed oxides. In this research, a nano-size perovskite SrFeO3-δ (SrFeO3<su...

control of the optical properties of nanoparticles by laser fields

در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...

Catalytic Activity of Pd/Cu Random Alloy Nanoparticles for Oxygen Reduction.

Trends in oxygen reduction activity of Pd/Cu bimetallic random alloy nanoparticles are determined with calculations of oxygen binding for a range of compositions. A reduction in the average oxygen binding is found as Cu is added to Pd, indicating an increase in catalytic activity up to a peak at 1:1 Pd/Cu ratio. Calculations show that Cu reduces the Pd-O binding energy and Pd increases the Cu-O...

Correction to "Catalytic Activity of Pd/Cu Random Alloy Nanoparticles for Oxygen Reduction".

CHARACTERIZATION OF HIGH-SILICA MORDENITE OBTAINED BY DIRECT SYNTHESIS

Three high-silica mordenite zeolites differing in SiO440, ratio were prepared by direct synthesis without using any template. The products Si02/A120, ratio is influenced by the starting gel composition. This ratio is increased upon ion-exchange with NH,Cl and subsequent calcination to prepare protonic mordenite. The protonic mordenites with Si02/A1203ra tios of 14.6,29.2 and 34.6 were chara...