Nickel nanowire and nanotube arrays as supports for Pt-Pd catalyst were prepared by elec- troless deposition with anodic aluminum oxide template. Pt-Pd composite catalyst was de- posited on the arrays by displacement ...Nickel nanowire and nanotube arrays as supports for Pt-Pd catalyst were prepared by elec- troless deposition with anodic aluminum oxide template. Pt-Pd composite catalyst was de- posited on the arrays by displacement reaction. SEM images show that the nickel nanowires have an average diameter of I00 nm and the nickel nanotubes have an average inner diameter of 200 nm. EDS scanning reveals that elemental Pt and Pd disperse uniformly on the arrays. Cyclic voltammetry study indicates that the nickel nanotube array loaded with Pt-Pd pos- sesses a higher electrochemical activity for ethanol oxidation than the nickel nanowire array with Pt-Pd.展开更多
Lipid molecules can self-assemble into a tubular structure,which is formed by tightly wound helical ribbons.Lipid tubules are utilized as a precursor to fabricate a novel Ni-decorated helical ribbon composite microstr...Lipid molecules can self-assemble into a tubular structure,which is formed by tightly wound helical ribbons.Lipid tubules are utilized as a precursor to fabricate a novel Ni-decorated helical ribbon composite microstructure in a high yield by electroless deposition.The microstructure carries Ni nanoparticles on the flat face and wires at the edge of helical ribbon,in which the average size of nanoparticles is about 40―60 nm,and the wires are of a layered structure strongly correlated with a multi-bilayer structure in the lipid membrane.Compared with the tubular precursor,the Ni-decorated composite microstructure becomes short and irregular shapes due to the breakage in the deposition,and its formation is largely bound up with the tubular helical structure and the different catalytic process.Finally,the helical composite microstructure would have a potential application in the development of electric active materials.展开更多
文摘Nickel nanowire and nanotube arrays as supports for Pt-Pd catalyst were prepared by elec- troless deposition with anodic aluminum oxide template. Pt-Pd composite catalyst was de- posited on the arrays by displacement reaction. SEM images show that the nickel nanowires have an average diameter of I00 nm and the nickel nanotubes have an average inner diameter of 200 nm. EDS scanning reveals that elemental Pt and Pd disperse uniformly on the arrays. Cyclic voltammetry study indicates that the nickel nanotube array loaded with Pt-Pd pos- sesses a higher electrochemical activity for ethanol oxidation than the nickel nanowire array with Pt-Pd.
文摘Lipid molecules can self-assemble into a tubular structure,which is formed by tightly wound helical ribbons.Lipid tubules are utilized as a precursor to fabricate a novel Ni-decorated helical ribbon composite microstructure in a high yield by electroless deposition.The microstructure carries Ni nanoparticles on the flat face and wires at the edge of helical ribbon,in which the average size of nanoparticles is about 40―60 nm,and the wires are of a layered structure strongly correlated with a multi-bilayer structure in the lipid membrane.Compared with the tubular precursor,the Ni-decorated composite microstructure becomes short and irregular shapes due to the breakage in the deposition,and its formation is largely bound up with the tubular helical structure and the different catalytic process.Finally,the helical composite microstructure would have a potential application in the development of electric active materials.
