Gold is among the most used materials in electrocatalysis. Despite this, this noble metal is still too expensive to be used in the fabrication of low cost and disposable devices. In the present work, gold-leaf sheets, usually employed in decorative crafts and wedding candies, is introduced as an inexpensive source of gold. Planar-disc and nanoband gold electrodes were simply and easily manufactured by combining gold leaf and polyimide tape. The planar disc electrode exhibited electrochemical behavior similar to that of a commercial gold electrode in 0.2 mol L⁻¹ H₂SO₄; cyclic voltammetry of a 1 mmol L⁻¹ solution of potassium ferricyanide (K₃[Fe(CN)₆]) in 0.2 mol L⁻¹ KNO₃, using this novel electrode, displayed an 80 mV difference between the oxidation and reduction peak potentials. The electrode also delivers promising prospects for the development of wearable devices. When submitted to severe mechanical deformation, this electrode exhibited neither loss of electrical contact nor significant variation in electrode response, even after fifteen bending and/or folding cycles. The thickness of the gold-leaf sheet facilitates the production of nanoband electrodes with behavior similar to that of ultramicroelectrodes. The electrode surface is easily renewed by cutting a thin slice off its end with a razor blade; this process led to limiting currents that were reproducible, presenting a relative standard deviation (RSD) of 3.8% (n = 5).

金是电催化中最常用的材料之一。尽管如此，这种贵金属仍然太昂贵而不能用于制造低成本和一次性装置。在当前的工作中，通常用于装饰工艺和婚礼糖果的金箔纸被引入作为廉价的黄金来源。通过结合金箔和聚酰亚胺胶带，可以简便地制造平面圆盘电极和纳米带金电极。平面圆盘电极在0.2 mol L ^-1 H ₂ SO _4中的电化学行为与市售金电极相似。循环伏安法在0.2 mol L ^-1中的铁氰化钾（K ₃ [Fe（CN）₆ ]）的1 mmol L ^-1溶液使用这种新型电极的KNO ₃在氧化和还原峰电位之间显示出80 mV的差异。电极还为可穿戴设备的开发提供了有希望的前景。当经受严重的机械变形时，即使在十五次弯曲和/或折叠循环之后，该电极也没有表现出电接触损失或电极响应的显着变化。金箔片的厚度促进了纳米带电极的生产，其行为类似于超微电极。用剃须刀从其末端切下薄片可以很容易地更新电极表面。此过程导致可重复的极限电流，相对标准偏差（RSD）为3.8％（n = 5）。