title: Facile synthesis of porous bimetallic alloyed PdAg nanoflowers supported on reduced graphene oxide for simultaneous detection of ascorbic acid, dopamine, and uric acid.
abstract: Porous bimetallic alloyed palladium silver (PdAg) nanoflowers supported on reduced graphene oxide (PdAg NFs/rGO) were prepared via a facile and simple in situ reduction process, with the assistance of cetyltrimethylammonium bromide as a structure directing agent. The as-prepared nanocomposite modified glassy carbon electrode (PdAg NFs/rGO/GCE) showed enhanced catalytic currents and enlarged peak potential separations for the oxidation of ascorbic acid (AA), dopamine (DA), and uric acid (UA) as compared to those of PdAg/GCE, rGO/GCE, commercial Pd/C/GCE, and bare GCE. The as-developed sensor can selectively detect AA, DA, and UA with a good anti-interference ability, wide concentration ranges of 1.0 μM-2.1 mM, 0.4-96.0 μM, and 1.0-150.0 μM, respectively, together with low detection limits of 0.057, 0.048, and 0.081 μM (S/N = 3), respectively. For simultaneous detection of AA, DA, and UA, the linear current-concentration responses were observed from 1.0 μM-4.1 mM, 0.05-112.0 μM, and 3.0-186.0 μM, with the detection limits of 0.185, 0.017, and 0.654 μM (S/N = 3), respectively.
authors.affiliation: College of Geography and Environmental Science, College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, 321000, China. ajwang@znju.cn jjfeng@zjnu.cn.
authors.forename: Li-Xian
authors.initials: LX
authors.lastname: Chen
authors.forename: Jie-Ning
authors.initials: JN
authors.lastname: Zheng
authors.forename: Ai-Jun
authors.initials: AJ
authors.lastname: Wang
authors.forename: Lan-Ju
authors.initials: LJ
authors.lastname: Wu
authors.forename: Jian-Rong
authors.initials: JR
authors.lastname: Chen
authors.forename: Jiu-Ju
authors.initials: JJ
authors.lastname: Feng
mesh_terms: D000497:Alloys / Q000737:chemistry; D001205:Ascorbic Acid / Q000032:analysis*; D015374:Biosensing Techniques / Q000295:instrumentation; D004298:Dopamine / Q000032:analysis*; D055664:Electrochemical Techniques / Q000295:instrumentation; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D057230:Limit of Detection; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D010165:Palladium / Q000737:chemistry; D016062:Porosity; D012834:Silver / Q000737:chemistry*; D014527:Uric Acid / Q000032:analysis*
chemical_list: D000497:Alloys; D010087:Oxides; D014527:Uric Acid; D012834:Silver; D010165:Palladium; D006108:Graphite; D001205:Ascorbic Acid; D004298:Dopamine