纳米Ir/SPE电极的制备及其影响因素

Preparation of Nano-Ir/SPE Electrode and Its Influence Factors

首次选用镍作为中间催化剂,采用吸附还原成长法制备纳米Ir/SPE电极,并就镀浴温度和pH值、H2IrCl6浓度、NaBH4与H2IrCl6配比对电极制备的影响作了深入研究。研究表明:采用吸附还原成长法,以Ni作为中间催化剂,浓度为22mmol·L-1NaBH4与浓度为6mmol·L-1H2IrCl6的混合液作为镀浴,亦即NaBH4与H2IrCl6配比为3.6,pH值为8,镀浴温度为40℃,镀浴时间为24h的条件下,循环镀覆3次,可获得致密、均匀,具有良好电解性能的纳米级Ir/SPE电极。

Nano-Ir/SPE electrode was prepared using nickel as middle catalyst through absorption-reduction method. The influence factors, such as bath temperature, pH value of solution, H2IrCI6 concentration and the mol ratio of NaBH4 and H2IrCI6, on preparation of nano-Ir/SPE electrode were studied, Research results showed that the compact nano-Ir/SPE electrode could be prepared through dipping in mixture, which was mixed by 22 mmol.L^-1 NaBH4 and 6 mmol.L^-1 H2IrCI6, with pH value of 8, at 40℃ for 24 hours and 3 times cycling coating.