One-step electrodeposition of Au-Pt bimetallic nanoparticles on MoS 2 nanoflowers for hydrogen peroxide enzyme-free electrochemical sensor
2017; Elsevier BV; Volume: 250; Linguagem: Inglês
10.1016/j.electacta.2017.08.044
ISSN1873-3859
AutoresJuan Zhou, Yanan Zhao, Jing Bao, Danqun Huo, Huanbao Fa, Xin Shen, Changjun Hou,
Tópico(s)Advanced biosensing and bioanalysis techniques
ResumoThe rationally designed sensor architecture is very important to improve the sensitivity and selectivity for H2O2 enzyme-free electrochemical sensor. In this work, a sensitive H2O2 biosensor was fabricated by electrochemical deposition of Au-Pt bimetallic nanoparticles (NPs) on molybdenum disulfide nanoflowers (MoS2 NFs). Au-Pt NPs was dispersed or stabilized by the effective support matrix of MoS2 nanosheets, which was effectively enhance the conductivity, catalytic performance and long-term stability. The experimental results show that MoS2-Au/Pt nanocomposites exhibit excellent catalytic activity for specific detection of H2O2, and electrochemical measurement results show that the enzyme-free electrochemical sensor has large linear range of 10 μM to 19.07 mM with high sensitivity of 142.68 μA mM−1 cm−2. This novel sensor produced satisfactory reproducibility and stability, and exhibited superior potential for the practical quantitative analysis of H2O2 in serum samples.
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