An electrochemical procedure (capping-agent free) to produce nanocrystalline platinum surfaces is developed by applying modulated AC and DC potentials to platinum wires in acid media. Platinum nanospheres grow after a DC potential has been applied for a long period, followed by hydrogen evolution reduction. The nanospheres can be further converted into nanocubes using high-frequency symmetric square wave potentials, or into cubebipyramids by subjecting the resulting spheres and cubes to cathodic hydrogen evolution at potentials between − 3.0 and − 0.5 V in sulfuric acid. The cubebipyramids exhibit strong catalytic activity towards carbon monoxide oxidation, which can be explained by the formation of 2(111) × (100) stepped planes.

通过在酸性介质中对铂丝施加调制的交流和直流电势，开发出了一种用于生产纳米晶铂表面的电化学程序（无封端剂）。长时间施加直流电后，铂纳米球生长，然后氢析出减少。可以使用高频对称方波电势将纳米球进一步转化为纳米立方体，或者通过使所得的球形和立方体在硫酸中处于-3.0至-0.5 V的电势下经受阴极氢析出，将其进一步转化为立方双锥体。立方双金字塔对一氧化碳的氧化显示出很强的催化活性，这可以通过形成2（111）×（100）台阶面来解释。