摘要
碱性固体电解质水电解是一种新兴的电解水制氢技术,有望解决碱性液体电解质水电解技术有碱雾、酸性固体电解质水电解所用催化剂成本高等不足,因而具有规模化扩大的潜力。膜电极组件是电解池中核心部件,改变膜电极催化层中阴离子交换树脂的比例可以实现对膜电极的优化。运用电化学方法对制备的膜电极进行表征测试,包括全电池I-V曲线测试、电化学阻抗谱(EIS)测试、全电池稳定性测试等等。当阳极采用担载量为1.5 mg/cm2的Ir黑,阴极采用1mg/cm2的70%(质量分数)Pt/C,催化剂与阴离子交换树脂的质量比为85∶15时,全电解池在1.877 V时电流密度达到了500 m A/cm2。
Alkaline solid polymer electrolyte electrolyser is a promising technology, which may improve the low efficiency of traditional alkaline liquid electrolyte electrolyser and avoid using the expensive PGM catalysts. The membrane electrode assemblies（MEA） is the key component of the electrolyser. Ionomer content in the catalyst layer（CL） is found to have a substantial effect on the electrolyer performance. In this work,the optimization of ionomer content in an alkaline solid polymer electrolyte electrolyser was focused on. Some electrochemical methods were used to characterize the home-made MEAs,including I-V polarization curve, electrochemical impedance spectroscopy（EIS）, single cell stability test, etc. Ultimately, the best single cell performance achieved was 1.877 V @500 m A/cm^2 at 50 ℃ from the prepared MEA with Pt loading of 0.7 mg/cm^2 of Pt/C as cathode catalyst, 1.5 mg/cm^2 Ir black as anode catalyst and 15.0 % ionomer content in CL.
出处
《电源技术》
CAS
CSCD
北大核心
2015年第12期2635-2638,共4页
Chinese Journal of Power Sources
基金
辽宁省自然科学基金
关键词
碱性固体电解质水电解
膜电极
阴离子交换膜
制氢
alkaline solid polymer electrolyte electrolyser
membrane electrode assemblies
alkaline solid polymer electrolyte
hydrogen production
