نتایج جستجو برای: palladium nanoparticle

تعداد نتایج: 43029  

1996
Melvin H. Miles Kendall B. Johnson

Excess power production and other anomalous effects have been observed during the electrolysis of heavy water using palladium and palladium-boron alloys as the cathode materials. This study focused on hydrogen and deuterium loading into palladium and palladium-boron alloys. Improved calorimetry provided for the detection of the exothermic heat of absorption of deuterium into palladium and palla...

Journal: :ACS nano 2008
Jue Lu Inhwan Do Lawrence T Drzal Robert M Worden Ilsoon Lee

We report the novel fabrication of a highly sensitive, selective, fast responding, and affordable amperometric glucose biosensor using exfoliated graphite nanoplatelets (xGnPs) decorated with Pt and Pd nanoparticles. Nafion was used to solubilize metal-decorated graphite nanoplatelets, and a simple cast method with high content organic solvent (85 wt %) was used to prepare the biosensors. The a...

2009
T. Conant A. M. Karim V. Lebarbier Y. Wang F. Girgsdies R. Schlögl A. Datye

ZnO-supported palladium-based catalysts have been shown in recent years to be both active and selective towards the steam reforming of methanol, although they are still considered to be less active than traditional copper-based catalysts. The activity of PdZn catalysts can be significantly improved by supporting them on alumina. Here we show that the Pd/ZnO/Al2O3 catalysts have better long-term...

2011
Grégory Guisbiers Gulmira Abudukelimu Djamila Hourlier

While nanocatalysis is a very active field, there have been very few studies in the size/shape-dependent catalytic properties of transition metals from a thermodynamical approach. Transition metal nanoparticles are very attractive due their high surface to volume ratio and their high surface energy. In particular, in this paper we focus on the Pt-Pd catalyst which is an important system in cata...

Journal: :analytical and bioanalytical chemistry research 0
mohsen keyvanfard department of chemistry, majlesi branch, islamic azad university, isfahan, 86145-311 iran behzad rezaei department of chemistry, isfahan university of technology, isfahan 84156-83111 iran khadijeh alizad department of chemistry, majlesi branch, islamic azad university, isfahan, 86145-311 iran

nowadays, palladium compounds due to their especial characteristics used in different industries, mainly in electrical power sources and chemical productions as a catalyst. therefore, pd concentration is increasing in our around that can be contaminant our environment due its toxic effects. in this work, a simple, selective and rapid flow injection method of analysis (fia) has been developed fo...

Journal: :Contact dermatitis 2013
Cecilia Tillman Malin Engfeldt Monica Hindsén Magnus Bruze

BACKGROUND Since the EU Nickel Directive came into force, concern has been raised that palladium may increasingly replace nickel in alloys used in jewellery and dentistry, and that it may cause as many allergy problems as nickel. OBJECTIVES (i) To investigate the clinical relevance of contact allergy to palladium resulting from the wearing of palladium-coated earrings, and (ii) to evaluate th...

Journal: :Molecules 2005
P C Pandey B C Upadhyay

We report herein the effect of palladium on the redox electrochemistry of ferrocene monocarboxylic acid encapsulated within an organically modified sol-gel glass network (ORMOSIL). It has been found that amount of palladium and its geometrical distribution significantly alter the redox electrochemistry of FcMCA. The geometrical distribution of palladium has been controlled by two methods: (i) p...

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