Center for Electrochemistry and Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712-1224, United States.
Anal Chem. 2012 Nov 6;84(21):9498-504. doi: 10.1021/ac302349m. Epub 2012 Oct 18.
We report a simple method of preparation of carbon paste ultramicroelectrodes (UMEs) for use as probe tips in scanning electrochemical microscopy (SECM). Carbon paste UMEs were prepared by packing the carbon paste into a chemically etched tip of a Pt-UME or a pulled glass capillary. Carbon-based UMEs are attractive in micrometer to nanometer gap experiments and in electrodeposition of single metal nanoparticles for electrocatalytic studies because of their high overpotential in proton and oxygen reduction. We have demonstrated the preparation of conically shaped carbon paste UMEs, appropriate for SECM measurements and micrometer to nanometer gap experiments.
我们报告了一种简单的制备碳糊超微电极（UMEs）的方法，将其用作扫描电化学显微镜（SECM）中的探针尖端。碳糊 UME 通过将碳糊填充到 Pt-UME 的化学蚀刻尖端或拉制的玻璃毛细管中来制备。碳基 UME 在微米到纳米间隙实验和用于电催化研究的单金属纳米粒子的电沉积中很有吸引力，因为它们在质子和氧还原中的过电势很高。我们已经证明了制备适合 SECM 测量和微米到纳米间隙实验的锥形碳糊 UME 的方法。
