氢传感器用铂电极的制备及性能研究  

Preparation and properties of platinum electrode for hydrogen sensors

作　　者：沈月[1] 闻明[1] 李思勰 刘继松[1] 吕刚[1] SHEN Yue;WEN Ming;LI Si-xie;LIU Ji-song;LÜGang(State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Kunming Institute of Precious Metals,Kunming 650106,China)

机构地区：[1]昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明650106

出　　处：《贵金属》2022年第2期17-24,共8页Precious Metals

基　　金：昆明市科技计划重点项目(2019-1-G-25318000003405);云南省科技科技计划项目中央引导地方科技发展资金计划(202207AA110009);云南省创新团队项目(2019HC024);昆明市稀贵金属溅射靶材科技创新团队项目(13020169)。

摘　　要：采用浆料涂覆烧结法制备铂电极,对比了基材处理方式(磁控溅射/喷砂)、铂黑(Ptb)和氧化铂(PtO_(2))粒径差异对电极形貌、附着力、方阻及电催化性能的影响。结果表明,基材采用磁控溅射法制备的涂层表面结构优于喷砂法的涂层,使其剥离强度均略高于喷砂处理的样品;针对于粉末粒度,需控制在一定范围内(即Ptb(350 nm)和PtO_(2)(350 nm)),其制备的涂层表面易形成蜂窝状或絮状的微连接结构,可显著降低方阻,提高其附着力。对结构和附着力较好的Ptb/Pt电极和PtO_(2)/Pt电极进行CV曲线分析,PtO_(2)/Pt电极的电催化性能优于Ptb/Pt电极。Platinum electrodes were prepared by slurry coating and sintering method.The effects of substrate treatment(magnetron sputtering/sand blasting),platinum black(Ptb)and platinum oxide(PtO_(2))particle size differences on electrode morphology,adhesion,square resistance and electrocatalytic properties were compared.The results showed that the surface structure of the coating by magnetron sputtering was better than that of the coating by sand blasting,and that the peel strength of that coating was slightly higher than that of the sample by sand blasting.For powder particle size,it needs to be controlled within a certain range(i.e.,Ptb(350 nm)and PtO_(2)(350 nm)).The surface of the coating was easy to form a honeycomb or flocculent-like micro junction structure,which could significantly reduce the square resistance and improve the adhesion.The CV curves of Ptb/Pt and PtO_(2)/Pt electrodes with better structure and adhesion showed that the electrocatalytic performance of PtO_(2)/Pt electrode was better than that of Ptb/Pt electrode.

关 键 词：氢传感器 铂电极 电催化性能 烧结 形貌 

分 类 号：TG146.34[一般工业技术—材料科学与工程]