Abstract
Novel sensing materials have been formed by decorating polyaniline conducting polymers with atomic gold clusters where the number of atoms is precisely defined. Such materials exhibit unique electrocatalytic properties of electrooxidation to aliphatic alcohols, although analytes with other functional groups have not been studied. This paper reports a study of cyclic voltammetric patterns obtained with bi-atomic gold nanocomposite response to analytes with other functional groups for sensor applications. Principal component analysis shows separation among normal-propanol, iso-propanol and ethyl formate/ethanol groups. Indirect sensing of ethyl formate is demonstrated by electrooxidation of the product upon hydrolysis in alkaline medium. Voltammograms of ethyl formate are studied in gaseous phases.
Highlights
IntroductionGas sensing systems are known to have a variety of applications in health, security, energy, etc
Gas sensing systems are known to have a variety of applications in health, security, energy, etc. it is essential to have sensor devices with sufficient sensitivity and selectivity, there is still room for improving the sensor characteristics
From n-propanol to n-butanol, the current density did not vary much, there was a remarkable rise in the oxidation peak at +0.2 V for n-butanol
Summary
Gas sensing systems are known to have a variety of applications in health, security, energy, etc. It is essential to have sensor devices with sufficient sensitivity and selectivity, there is still room for improving the sensor characteristics. We focus on noble metal-based catalytic materials, i.e., atomic gold. It has been reported that novel sensing materials, such as noble metal nanoclusters [1]. Metal oxides [2,3], show interesting catalytic properties. It has been demonstrated that while bulk metal electrode exhibits some catalytic activity, the activity is greatly enhanced when bulk metal is reduced to nanocluster size [4]. Alcohols catalyzed by metal clusters have shown electrooxidation of 2-propanol to its corresponding ketone in alkaline medium
Sign-in/Register to view highlights & summary 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.
