This work presents an application of Raman spectroscopy as a tool to investigate heterogeneity in the composition of carbon materials obtained electrochemically. A combination of Raman maps and histograms has been used to describe samples synthesized via wet chemistry. The results showed that a simple evaluation of an average spectrum or one single spectrum per sample would have hidden important compositional variations present in the film. The Raman maps revealed heterogeneous hydrogenation in different areas of the carbon films, whereas histograms described the statistical relevance of the classification of the different types of carbon materials. The effect of electrosynthesis parameters on the quality of the films was also investigated. As the deposition time increased, the carbon films showed higher homogeneity in their spatial composition. The nature of the electrolyte led to differences in film functionalization and on the degree of hydrogenation.

中文翻译：

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拉曼图揭示了碳材料上的非均相氢化

这项工作提出了拉曼光谱法作为研究电化学获得的碳材料的成分异质性的工具的应用。拉曼图和直方图的组合已用于描述通过湿化学合成的样品。结果表明，对每个样品的平均光谱或一个单一光谱进行简单评估，将掩盖膜中存在的重要成分变化。拉曼图揭示了碳膜不同区域的异质氢化，而直方图描述了不同类型碳材料分类的统计相关性。还研究了电合成参数对薄膜质量的影响。随着沉积时间的增加，碳膜的空间组成显示出更高的均匀性。