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Inexpensive, Three-dimensional, Open-cell, Fluid-permeable, Noble Metal Electrodes for Electroanalysis and Electrocatalysis.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-09-14 , DOI: 10.1021/acsami.0c13303 Abbas Parvez Kazi 1 , Anna Maria Routsi 1 , Balwinder Kaur 1 , Dionysios C Christodouleas 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-09-14 , DOI: 10.1021/acsami.0c13303 Abbas Parvez Kazi 1 , Anna Maria Routsi 1 , Balwinder Kaur 1 , Dionysios C Christodouleas 1
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This study describes the fabrication of three-dimensional, open-cell, noble-metal (Au, Ag, and Pt) electrodes that have a complex geometry, i.e., wire mesh, metallic foam, “origami” wire mesh, and helix wire mesh. The electrodes were fabricated using an ultrasonication-assisted electroplating method that deposits a thin, continuous, and defect-free layer of noble metal (i.e., Au, Ag, or Pt) on an inexpensive copper substrate that has the desired geometry. The method is inexpensive, easy to use, and capable of fabricating noble-metal electrodes of complex geometries that cannot be fabricated using established techniques like screen printing or physical vapor deposition. By minimizing the amount of the pure noble metal in the electrodes, their cost drops significantly and could become low enough even for single-use applications; for example, the cost of metal in a Au wire-mesh electrode is $0.007/cm2 of exposed area that is about 400 times lower than that of a wire-mesh electrode composed entirely of Au. The electrodes exhibit an almost identical electrochemical performance to noble-metal electrodes of similar shape composed of bulk noble metal; therefore, these electrodes could replace two-dimensional noble-metal electrodes (e.g., rods, disks, foils) in numerous electroanalytical and electrocatalytical systems or even allow the use of noble-metal electrodes in new applications such as flow-based electrochemical systems. In this study, wire-mesh and metallic foam noble-metal electrodes have been successfully used as working electrodes for the electrocatalytical oxidation of methanol and for the electrochemical detection of redox mediators, lead ions, and nitrobenzene using various electroanalytical techniques.
中文翻译：
廉价的三维，开孔，可渗透流体的贵金属电极，用于电分析和电催化。
这项研究描述了具有复杂几何形状的三维，开孔，贵金属（Au，Ag和Pt）电极的制造，即，金属丝网，泡沫金属，“折纸”金属丝网和螺旋金属丝网。使用超声辅助电镀方法制造电极，该方法在具有所需几何形状的廉价铜基板上沉积薄，连续且无缺陷的贵金属层（即Au，Ag或Pt）。该方法便宜，易于使用，并且能够制造具有复杂几何形状的贵金属电极，这些贵金属电极不能使用诸如丝网印刷或物理气相沉积的现有技术来制造。通过最大限度地减少电极中纯贵金属的含量，它们的成本将大大降低，甚至对于一次性应用也可能变得足够低。例如，图2的暴露区域比完全由Au组成的丝网电极的暴露区域低约400倍。电极表现出与由块状贵金属组成的形状相似的贵金属电极几乎相同的电化学性能。因此，这些电极可以在许多电分析和电催化系统中替代二维贵金属电极（例如，棒，盘，箔），甚至可以在新的应用（例如基于流的电化学系统）中使用贵金属电极。在这项研究中，金属丝网和金属泡沫贵金属电极已成功地用作甲醇的电催化氧化工作的电极，并使用各种电分析技术对氧化还原介质，铅离子和硝基苯进行电化学检测。
更新日期：2020-10-07
中文翻译：
廉价的三维，开孔，可渗透流体的贵金属电极，用于电分析和电催化。
这项研究描述了具有复杂几何形状的三维，开孔，贵金属（Au，Ag和Pt）电极的制造，即，金属丝网，泡沫金属，“折纸”金属丝网和螺旋金属丝网。使用超声辅助电镀方法制造电极，该方法在具有所需几何形状的廉价铜基板上沉积薄，连续且无缺陷的贵金属层（即Au，Ag或Pt）。该方法便宜，易于使用，并且能够制造具有复杂几何形状的贵金属电极，这些贵金属电极不能使用诸如丝网印刷或物理气相沉积的现有技术来制造。通过最大限度地减少电极中纯贵金属的含量，它们的成本将大大降低，甚至对于一次性应用也可能变得足够低。例如，图2的暴露区域比完全由Au组成的丝网电极的暴露区域低约400倍。电极表现出与由块状贵金属组成的形状相似的贵金属电极几乎相同的电化学性能。因此，这些电极可以在许多电分析和电催化系统中替代二维贵金属电极（例如，棒，盘，箔），甚至可以在新的应用（例如基于流的电化学系统）中使用贵金属电极。在这项研究中，金属丝网和金属泡沫贵金属电极已成功地用作甲醇的电催化氧化工作的电极，并使用各种电分析技术对氧化还原介质，铅离子和硝基苯进行电化学检测。
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