Epoxy-sealed single Pt nanoelectrodes (SPNEs) ranging in size from 3 to 300 nm have been fabricated by a laser-assisted pulling method and characterized by optical microscopy, transmission electron microscopy (TEM) and electrochemical methods. The prepared SPNEs were used to investigate the methanol oxidation reaction (MOR), and the results show that the electrocatalytic activity of the SPNEs towards MOR depends on the radius of the electrode. In the range of electrode radii tested (3 nm–280 nm), the electrocatalytic activity decreases if the radius of the SPNE is either too small or too large, with optimal electrocatalytic efficiency being observed when the radius is about 4.2 nm.

已经通过激光辅助拉制法制备了尺寸为3至300 nm的环氧密封单Pt纳米电极（SPNE），并通过光学显微镜，透射电子显微镜（TEM）和电化学方法进行了表征。制备的SPNE被用于研究甲醇氧化反应（MOR），结果表明SPNE对MOR的电催化活性取决于电极的半径。在所测试的电极半径范围（3 nm–280 nm）中，如果SPNE的半径太小或太大，电催化活性都会降低，当半径约为4.2 nm时，可以观察到最佳的电催化效率。