Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Facile template-free synthesis of pine needle-like Pd micro/nano-leaves and their associated electro-catalytic activities toward oxidation of formic acid | Zhou et al. Nanoscale Research Letters 2011 6 381 http content 6 1 381 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Facile template-free synthesis of pine needle-like Pd micro nano-leaves and their associated electro-catalytic activities toward oxidation of formic acid Rong Zhou1 2 Weiqiang Zhou1 3 Hongmei Zhang1 2 Yukou Du 1 Ping Yang1 Chuanyi Wang2 and Jingkun Xu3 Abstract Pine needle-like Pd micro nano-leaves have been synthesized by a facile template-free electrochemical method. As-synthesized Pd micro nano-leaves were directly electrodeposited on an indium tin oxide substrate in the presence of mM H2PdCl4 M H3PO4. The formation processes of Pd micro nano-leaves were revealed by scanning electron microscope and further characterized by X-ray diffraction and electrochemical analysis. Compared to conventional Pd nanoparticles as-prepared Pd micro nano-leaves exhibit superior electrocatalytic activities for the formic acid oxidation. Introduction Energy storage devices including fuel cell Li-batteries etc. have been developing especially today 1 2 . Direct formic acid fuel cell has been receiving much attention as one of the most attractive energy sources 3 . Palladium Pd was found to show superior catalytic activity for formic acid electrooxidation compared with Pt-based catalysts 4 5 . Considerable efforts have currently been directed to developing novel Pd catalysts. Due to high-surface area and other unique physicochemical properties nano-catalysts are known to have a significant effect on promoting the electro-oxidation of formic acid. Well-controlled nanostructures are thereby essential for achieving high efficient catalysts used in fuel cells. From this prospect Pd nanoparticles with a variety of shapes have been explored such as microspheres 6 polygonal nanoparticles 7 8 nanotubes 9 nanothorns 10 nanorods 11 and nanowires 12-15 . Sun et al. reported the efficiency of formic acid .
