A Strategy for the Formation of Gold-Palladium Supra-Nanoparticles from Gold Nanoparticles of Various Shapes and Their Application to High-Performance H2O2 Sensing
- Authors
- Huang, Youju; Ferhan, Abdul Rahim; Dandapat, Anirban; Yoon, Chong Seung; Song, Ji Eun; Cho, Eun Chul; Kim, Dong-Hwan
- Issue Date
- Nov-2015
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, v.119, no.46, pp.26164 - 26170
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY C
- Volume
- 119
- Number
- 46
- Start Page
- 26164
- End Page
- 26170
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/24823
- DOI
- 10.1021/acs.jpcc.5b08423
- ISSN
- 1932-7447
- 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 .
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