title: A Palladium-Tin Modified Microband Electrode Array for Nitrate Determination.
abstract: A microband electrode array modified with palladium-tin bimetallic composite has been developed for nitrate determination. The microband electrode array was fabricated by Micro Electro-Mechanical System (MEMS) technique. Palladium and tin were electrodeposited successively on the electrode, forming a double-layer structure. The effect of the Pd-Sn composite was investigated and its enhancement of catalytic activity and lifetime was revealed. The Pd-Sn modified electrode showed good linearity (R² = 0.998) from 1 mg/L to 20 mg/L for nitrate determination with a sensitivity of 398 μA/(mg∙L(-1)∙cm²). The electrode exhibited a satisfying analytical performance after 60 days of storage, indicating a long lifetime. Good repeatability was also displayed by the Pd-Sn modified electrodes. The results provided an option for nitrate determination in water.
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. akechi89@163.com.|University of Chinese Academy of Sciences, Beijing 100080, China. akechi89@163.com.
authors.forename: Yexiang
authors.initials: Y
authors.lastname: Fu
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. cbian@mail.ie.ac.cn.
authors.forename: Chao
authors.initials: C
authors.lastname: Bian
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. renzhongxing1@163.com.|University of Chinese Academy of Sciences, Beijing 100080, China. renzhongxing1@163.com.
authors.forename: Jian
authors.initials: J
authors.lastname: Kuang
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. binfen328@163.com.
authors.forename: Jinfen
authors.initials: J
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. jhtong@mail.ie.ac.cn.
authors.forename: Jianhua
authors.initials: J
authors.lastname: Tong
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. shxia@mail.ie.ac.cn.
authors.forename: Shanhong
authors.initials: S
authors.lastname: Xia
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D046228:Microarray Analysis / Q000295:instrumentation; D008839:Microelectrodes; D053761:Nanocomposites / Q000737:chemistry; D009566:Nitrates / Q000032:analysis* / Q000378:metabolism; D010084:Oxidation-Reduction; D010165:Palladium / Q000737:chemistry*; D012680:Sensitivity and Specificity; D014001:Tin / Q000737:chemistry* / Q000378:metabolism
chemical_list: D009566:Nitrates; D010165:Palladium; D014001:Tin
keywords: bimetallic composite; electrodeposition; microband electrode array; nitrate determination; palladium-tin coexistence