Graphene–carbon nanotube composite as an effective conducting scaffold to enhance the photoelectrochemical water oxidation activity of a hematite film
SCIE
SCOPUS
- Title
- Graphene–carbon nanotube composite as an effective conducting scaffold to enhance the photoelectrochemical water oxidation activity of a hematite film
- Authors
- Kim, JY; Jang, JW; Youn, DH; Kim, JY; Kim, ES; Lee, JS
- Date Issued
- 2012-10
- Publisher
- ROYAL SOC CHEMISTRY
- Abstract
- The iron oxide photoanode was modified with a graphene-carbon nanotube (CNT) composite conducting scaffold for efficient charge transfer from Fe2O3 particles to transparent conducting oxide substrate in photoelectrochemical water splitting cells. The Fe2O3-composite photoanode showed a photocurrent increase of 530% compared with to the bare Fe2O3 photoanode at 1.23 V vs. RHE, while the increase was only 200 and 240% for Fe2O3-CNT and Fe2O3-graphene photoanodes, respectively. This remarkable performance enhancement by the composite scaffold was attributed to synergistic effects induced by the formation of a 3D-like architecture from 1D CNT and 2D graphene. They become a spacer for each other forming a more open and highly exposed structure, in which both 2D graphene and 1D CNT can exist in the forms with much less self-agglomeration, thus not only enlarging the contact area between the conducting scaffold and Fe2O3 particles but also recovering in part the intrinsic conducting ability of graphene and CNT.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12842
- DOI
- 10.1039/C2RA21169F
- ISSN
- 2046-2069
- Article Type
- Article
- Citation
- RSC Advances, vol. 2, no. 25, page. 9415 - 9422, 2012-10
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