PtNi bimetallic nanoparticles loaded MoS2 nanosheets: Preparation and electrochemical sensing application for the detection of dopamine and uric acid

• Published in: Analytica chimica acta Vol. 1055; pp. 17 - 25
• Main Authors: Ma, Lian, Zhang, Qiaran, Wu, Chao, Zhang, Yue, Zeng, Lintao
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 09.05.2019; Elsevier BV
• Subjects: Bimetals; Catalysis; Catalytic activity; Chemical sensors; Detection; Detection limits; Dopamine; Electrochemical sensor; Electrochemistry; Glassy carbon; Intermetallic compounds; Molybdenum disulfide; Nanocomposite; Nanocomposites; Nanomaterials; Nanoparticles; Nanosheets; Nanotechnology; Photoelectron spectroscopy; Photoelectrons; Scanning electron microscopy; Selectivity; Spectroscopy; Spectrum analysis; Uric acid; X ray photoelectron spectroscopy; X-ray diffraction; Nanocomposite; Dopamine; Uric acid; Electrochemical sensor; Detection
• ISSN: 0003-2670; 1873-4324
• DOI: 10.1016/j.aca.2018.12.025

Composite nanomaterials are particularly useful and offer many excellent opportunities for electrochemical sensing application. Depending on the high catalytic activity of bimetallic nanoparticles, the large specific surface area, abundant active edges and co-catalytic function of MoS2 nanosheets, we, for the first time, prepared a novel PtNi bimetallic nanoparticles loaded MoS2 nanosheets (PtNi@MoS2) hybrid material by a co-reduction method for the electrochemical sensing application. The nanocomposite is characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS), and then casted on a bare glassy carbon electrode (GCE) to fabricate an electrochemical sensor (PtNi@MoS2/GCE). The electrochemical investigation showed that the sensor performed good selectivity and wide linear ranges for the simultaneous detection of dopamine (0.5–150 μM) and uric acid (0.5–600 μM). And the detection limits were down to 0.1 μM (S/N = 3) for both analytes. For the first time, a nanocomposite of PtNi bimetallic naoparticles loaded MoS2 nansheets was prepared by a co-reduction method and was used to establish an electrochemical sensor for the simultaneous detection of dopamine and uric acid. The sensor showed excellent performance and had been successfully applied for the simultaneous determination of the two analytes in human urine samples. [Display omitted] •PtNi bimetallic naoparticles loaded MoS2 nansheets (PtNi@MoS2) was prepared by a co-reduction method for the first time.•The nanocomposite combines both superior properties of two materials, which is in favor of good electrochemical performance.•The fabricated sensor based on this composite material showed excellent performance for simultaneous detection of DA and UA.•This sensor was also successfully applied for the simultaneous determination of DA and UA in human urine samples.