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A Strategy for the Formation of Gold-Palladium Supra-Nanoparticles from Gold Nanoparticles of Various Shapes and Their Application to High-Performance H2O2 Sensing

Title
A Strategy for the Formation of Gold-Palladium Supra-Nanoparticles from Gold Nanoparticles of Various Shapes and Their Application to High-Performance H2O2 Sensing
Author
윤종승
Keywords
AU-AT-PD; SUPERIOR ELECTROCATALYTIC ACTIVITY; CORE-SHELL NANOSTRUCTURES; HYDROGEN-PEROXIDE; CATALYTIC-PROPERTIES; SELECTIVE OXIDATION; AQUEOUS-SOLUTION; BIMETALLIC NANODENDRITES; SURFACTANT SOLUTIONS; OXYGEN REDUCTION
Issue Date
2015-11
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v. 119, NO 46, Page. 26164-26170
Abstract
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 corecontinuous Pd shell nanoparticles instead. The AuPd 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 .
URI
http://pubs.acs.org/doi/10.1021/acs.jpcc.5b08423http://hdl.handle.net/20.500.11754/28778
ISSN
1932-7447
DOI
10.1021/acs.jpcc.5b08423
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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