Electrocatalytic activity of NiO on silicon nanowires with a carbon shell and its application in dye-sensitized solar cell counter electrodes
- Authors
- Kim, Junhee; Jung, Cho-long; Kim, Minsoo; Kim, Soomin; Kang, Yoonmook; Lee, Hae-seok; Park, Jeounghee; Jun, Yongseok; Kim, Donghwan
- Issue Date
- 2016
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NANOSCALE, v.8, no.14, pp.7761 - 7767
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE
- Volume
- 8
- Number
- 14
- Start Page
- 7761
- End Page
- 7767
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/90270
- DOI
- 10.1039/c5nr08265j
- ISSN
- 2040-3364
- Abstract
- To improve the catalytic activity of a material, it is critical to maximize the effective surface area by directly contacting the electrolyte. Nanowires are a promising building block for catalysts in electrochemical applications because of their large surface area. Nickel oxide (NiO) decoration was achieved by dropcasting a nickel-dissolved solution onto vertically aligned silicon nanowire arrays with a carbon shell (SiNW/C). Based on the hybridization of the NiO and silicon nanowire arrays with a carbon shell this study aimed to achieve a synergic effect for the catalytic activity performance. This study demonstrated that the resulting nanomaterial exhibits excellent electrocatalytic activity and performs well as a counter electrode for dye-sensitized solar cells (DSSCs). The compositions of the materials were examined using X-ray diffraction, X-ray photoelectron spectroscopy, and energy dispersive spectroscopy. Their micro- and nanostructures were investigated using scanning electron microscopy and transmission electron microscopy. The electrochemical activity toward I-/I-3(-) was examined using cyclic voltammetry and electrochemical impedance spectroscopy. The obtained peak power conversion efficiency of the DSSC based on the NiO@SiNW/C counter electrode was 9.49%, which was greater than that of the DSSC based on the Pt counter electrode.
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Collections - Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL) > Department of Energy and Environment > 1. Journal Articles
- Graduate School > Department of Advanced Materials Chemistry > 1. Journal Articles
- College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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