Institute of Chemistry , University of Campinas , P.O. Box 6154, 13083-970 Campinas , São Paulo , Brazil.
Anal Chem. 2019 Aug 20;91(16):10386-10389. doi: 10.1021/acs.analchem.9b01518. Epub 2019 Jul 30.
Raman spectroelectrochemistry is a powerful technique for characterizing structural changes of materials during electrochemical reactions and investigating the mechanism of film deposition and adsorption processes on the surfaces of electrodes. Moreover, in situ measurements enable identification of catalytic sites and reaction intermediates, which facilitates the comprehension of reaction mechanisms. The limitations of this technique include the high-cost and the complexity of the experimental arrangement required by commercial spectroelectrochemical cells (SEC). Thus, 3D-printing technology emerges as an excellent alternative for the production of SEC, with desirable shape, low-cost, and robustness in a short period of time. In this work, an SEC and a 3D-printed working electrode were fabricated from acrylonitrile-butadiene-styrene (ABS) and conductive graphene polylactic acid (PLA) filaments, respectively. The proposed SEC and the 3D-printed electrode were printed within 3.5 h with an estimated cost of materials of less than US $2. Then, the 3D-printed SEC and the electrode were used in a study of structural changes of Prussian blue according to different voltage bias.
拉曼光谱电化学是一种强大的技术，可用于表征电化学反应过程中材料的结构变化，并研究薄膜沉积和电极表面吸附过程的机理。此外，原位测量可以识别催化位点和反应中间体，从而有助于理解反应机理。该技术的局限性包括商业光谱电化学池（SEC）所需的高成本和复杂的实验装置。因此，3D 打印技术成为 SEC 生产的理想替代品，具有理想的形状、低成本和在短时间内的坚固性。在这项工作中，分别使用丙烯腈-丁二烯-苯乙烯（ABS）和导电石墨烯聚乳酸（PLA）灯丝制造 SEC 和 3D 打印工作电极。提出的 SEC 和 3D 打印电极在 3.5 小时内打印完成，估计材料成本不到 2 美元。然后，根据不同的电压偏置，使用 3D 打印 SEC 和电极研究普鲁士蓝的结构变化。
