Abstract: A method for preparing platinum (Pt) based nano-size catalyst which is useful as an electrode catalyst of a direct methanol fuel cell (DMFC). This method includes the implementation of a reduction reaction of a platinum precursor and an optional ad-metal precursor with a reducing agent in a solvent and in the presence of a stabilizer to form a suspension containing colloidal particles of platinum or platinum/ad-metal; mixing the suspension with a co-solvent; subjecting the resultant mixture to a centrifugal treatment to form a platinum or platinum/ad-metal colloidal particle portion and a liquid portion, repeating the co-solvent mixing and centrifugal treatment to the platinum or platinum/ad-metal colloidal particle portion until the resultant liquid portion no longer contains the product of the reduction reaction; and drying the resultant platinum or platinum/ad-metal colloidal particle portion to obtain a platinum based nano-size catalyst.

Abstract: A method for preparing platinum (Pt) based nano-size catalyst which is useful as an electrode catalyst of a direct methanol fuel cell (DMFC). This method includes the implementation of a reduction reaction of a platinum precursor and an optional ad-metal precursor with a reducing agent in a solvent and in the presence of a stabilizer to form a suspension containing colloidal particles of platinum or platinum/ad-metal; mixing the suspension with a co-solvent; subjecting the resultant mixture to a centrifugal treatment to form a platinum or platinum/ad-metal colloidal particle portion and a liquid portion, repeating the co-solvent mixing and centrifugal treatment to the platinum or platinum/ad-metal colloidal particle portion until the resultant liquid portion no longer contains the product of the reduction reaction; and drying the resultant platinum or platinum/ad-metal colloidal particle portion to obtain a platinum based nano-size catalyst.

Abstract: The present invention discloses a method for preparing platinum (Pt) based nano-size catalyst which is useful as an electrode catalyst of a direct methanol fuel cell (DMFC). This method includes the implementation of a reduction reaction of a platinum precursor and an optional ad-metal precursor with a reducing agent in a solvent and in the presence of a stabilizer to form a suspension containing colloidal particles of platinum or platinum/ad-metal; mixing the suspension with a co-solvent; subjecting the resultant mixture to a centrifugal treatment to form a platinum or platinum/ad-metal colloidal particle portion and a liquid portion, repeating the co-solvent mixing and centrifugal treatment to the platinum or platinum/ad-metal colloidal particle portion until the resultant liquid portion no longer contains the product of the reduction reaction; and drying the resultant platinum or platinum/ad-metal colloidal particle portion to obtain a platinum based nano-size catalyst.

Abstract: A non-volatile memory structure includes a substrate having two doped regions, a charge-trapping structure positioned substantially between the two doped regions, and a conductive structure positioned on the charge-trapping structure, wherein the charge-trapping structure includes a silicon-oxy-nitride layer and metallic nano-dots embedded in the silicon-oxy-nitride layer. The non-volatile memory structure formed by performing a first thermal oxidation process to form a high-k dielectric layer on a substrate, forming a metal-containing semiconductor layer including silicon or germanium on the high-k dielectric layer, forming a silicon layer on the metal-containing semiconductor layer, and performing a second thermal oxidation process to convert the metal-containing semiconductor layer to a silicon-oxy-nitride layer with embedded metallic nano-dots, wherein at least one of the first thermal oxidation process and the second thermal oxidation process is performed in a nitrogen-containing atmosphere.

Abstract: The present invention discloses a method for preparing platinum (Pt) based nano-size catalyst which is useful as an electrode catalyst of a direct methanol fuel cell (DMFC). This method includes the implementation of a reduction reaction of a platinum precursor and an optional ad-metal precursor with a reducing agent in a solvent and in the presence of a stabilizer to form a suspension containing colloidal particles of platinum or platinum/ad-metal; mixing the suspension with a co-solvent; subjecting the resultant mixture to a centrifugal treatment to form a platinum or platinum/ad-metal colloidal particle portion and a liquid portion, repeating the co-solvent mixing and centrifugal treatment to the platinum or platinum/ad-metal colloidal particle portion until the resultant liquid portion no longer contains the product of the reduction reaction; and drying the resultant platinum or platinum/ad-metal colloidal particle portion to obtain a platinum based nano-size catalyst.