【J. Phys. Chem. C 】A Strategy for the Formation of Gold–Palladium Supra-Nanoparticles from Gold Nanoparticles of Various Shapes and Their Application to High-Performance H2O2 Sensing
writer：Youju Huang; Abdul Rahim Ferhan; Anirban Dandapat; Chong Seung Yoon; Ji Eun Song; Eun Chul Cho*; Dong-Hwan Kim*
keywords：Gold–Palladium Supra-Nanoparticles
source：期刊
specific source：J. Phys. Chem. C 2015, 119, 26164?26170
Issue time：2015年
We present a new approach for the synthesis of gold (Au)?palladium (Pd) bimetallic supra-nanoparticles in which densely packed anisotropic Pd nanostructures surround a central Au nanoparticle (rod, sphere, cubic shape). They
were obtained by means of Pd crystal growth on Au nanoparticle surfaces which are modified with a mixture of cetyltrimethylammonium bromide (CTAB) and 5- bromosalicylic acid (5-BrSA). From a comparative study with a Au nanorod (NR) as a seed, the use of the CTAB/5-BrSA mixture plays a pivotal role in obtaining such unique supra-structures; the Au NR capped with only CTAB resulted in Au core? continuous Pd shell nanoparticles instead. The Au?Pd supra-nanoparticles provide active surface area for electrocatalytic activities higher than that of the Au@Pd
continuous shell nanoparticles, displaying outstanding performance for mediator-free electrochemical detection of H2O2.