Electrochemical Detection of Hydroxylamine via Au-Pt Alloy Nanoparticle-modified Single-walled Carbon Nanotube Electrodes
- Title
- Electrochemical Detection of Hydroxylamine via Au-Pt Alloy Nanoparticle-modified Single-walled Carbon Nanotube Electrodes
- Author
- 성기훈
- Keywords
- Au-Pt alloy nanoparticles; single-walled carbon nanotube; hydroxylamine; electrochemical sensor; electrocatalysis
- Issue Date
- 2017-09
- Publisher
- JAPAN SOC ANALYTICAL CHEMISTRY
- Citation
- ANALYTICAL SCIENCES, v. 33, NO. 9, Page. 993-998
- Abstract
- In the present study, we developed an electrochemical sensor for highly sensitive detection of hydroxylamine using Au-Pt alloy nanoparticles. Au-Pt alloy nanoparticles were electrochemically deposited on a working electrode made of single walled carbon nanotubes. The framework composition in the Au-Pt alloy nanoparticle was easily controlled by adjusting the Au3+:Pt4+ composition ratio in the precursor solution. Morphological and chemical characterizations of the resulting Au-Pt alloy nanoparticles were performed using field emission scanning electron microscopy, X-ray diffraction, and energy dispersion X-ray spectroscopy. When the Au3+:Pt4+ ratio in the precursor solution was 1:5, the ratio of Au:Pt atom in alloy nanoparticle was about 6:4. Au60Pt40 alloy nanoparticles were found to have the optimum synthetic ratio for hydroxylamine detection. The electrocatalytic performance of Au-Pt alloy nanoparticles in the presence of hydroxylamine was also characterized using cyclic voltammetry, differential pulse voltammetry, and chronoamperometry. In the chronoamperometric detection of hydroxylamine, the sensor exhibited a detection limit of 0.80 mu M (S/N = 3) and a high sensitivity of 184 mu A mM(-1) cm(-2). Moreover, the amperometric response of the sensor in 1 mM hydroxylamine was stable for a long time (450 s). Long-term stability tests showed that the current responses to hydroxylamine were 96, 91 and 85% of the initial signal value after storage for 5, 10, and 20 days, respectively.
- URI
- https://link.springer.com/article/10.2116/analsci.33.993https://repository.hanyang.ac.kr/handle/20.500.11754/183534
- ISSN
- 0910-6340;1348-2246
- DOI
- 10.2116/analsci.33.993
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > BIONANO ENGINEERING(생명나노공학과) > Articles
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- 4872_성기훈.pdfDownload
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