In-Situ XAS Investigation of the Effect of Electrochemical Reactions on the Structure of Graphene in Aqueous Electrolytes

In-situ X-ray Absorption Spectroscopy (XAS), Raman Spectroscopy, AFM and XPS have been used to investigate the effect of reactions occurring in aqueous electrolytes on the structure of a single-layer graphene produced by CVD. It was found that defects are readily and irreversibly produced by applica...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2013-01, Vol.160 (9), p.C445-C450
Main Authors: Velasco-Velez, Juan J., Chuang, Cheng-Hao, Han, Hui-Ling, Martin-Fernandez, Inigo, Martinez, Camille, Pong, Way-Faung, Shen, Yuen-Ron, Wang, Feng, Zhang, Yuegang, Guo, Jinghua, Salmeron, Miquel
Format: Article
Language:English
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Summary:In-situ X-ray Absorption Spectroscopy (XAS), Raman Spectroscopy, AFM and XPS have been used to investigate the effect of reactions occurring in aqueous electrolytes on the structure of a single-layer graphene produced by CVD. It was found that defects are readily and irreversibly produced by application of electrode voltages. The defects and the products were identified also by new features in the XAS spectra. Our findings show the poor stability of the CVD graphene, which could be a challenge in applications such as super-capacitors, fuel-cells, batteries and photo-catalysis.
ISSN:0013-4651
1945-7111
DOI:10.1149/2.113309jes