Abstract
This paper describes a simple and novel method to construct ruthenium–palladium (RuPd) bimetallic thin films by coating thin layer of RuPd metals on the nanoporous gold film (NPGF) electrode. The codeposition of Ru and Pd was done through oxidation of copper underpotential deposition (UPD) layer by Ru and Pd ions. This low RuPd-loading electrode (RuPdNPGF) behaved as the nanostructured bimetallic RuPd for the detection of captopril (CAP). Whereas at the surface of the bare electrode an electrochemical activity for CAP cannot be observed, a very sharp anodic peak of the potential of −0.295V (vs. Ag/AgCl) in pH=7.0 is obtained using the prepared RuPdNPGF electrode. RuPdNPGF exhibited an excellent performance toward electrochemical oxidation of CAP without any additional mediator showing a significant decrease in the anodic over potential, a high sensitivity and a low detection limit (1.25×10−9M) for CAP. Under the optimized conditions, the amperometric of CAP showed two linear ranges for determination of CAP: 2.50×10−9 to 4.75×10−7M CAP and 2.5×10−6 to 3.25×10−5M CAP. The results show that the RuPdNPGF electrode exhibited a selective, rapid response, good stability with excellent precision (RSD=2.19%).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
