Catalytic Activity of Atomic Gold-Decorated Polyaniline Support in Glucose Oxidation

Abstract

Atomic-level gold clusters are decorated on a polyaniline (PANI) support by a cyclic atomic electrodeposition process, and the catalytic activity in the oxidation of glucose is studied. The evaluation is conducted by cyclic voltammetry using atomic-level gold clusters-decorated PANI (PANI/AuN, where N indicates the atomic size of the Au cluster and N = 1~3 in this study) as the working electrode and a solution containing 0 to 50.0 mM of glucose in phosphate-buffered saline. The catalytic activity is determined from the oxidation current observed at around +0.6 V vs. Ag/AgCl. The catalytic activity is found to be affected by the size of gold clusters decorated on the PANI/AuN, whereby the catalytic activity is low when N is 1 or 3. On the other hand, an obvious enhancement in the catalytic activity is observed for the PANI/Au2 electrode.

Array of Miniaturized Amperometric Gas Sensors Using Atomic Gold Decorated Pt/PANI Electrodes in Room Temperature Ionic Liquid Films

“…In this study, polyaniline (PANI) was selected as the support matrix. PANI has been one of the most extensively studied conducting polymers; the literature sources regarding this polymer in acid or base, even in RTIL, are available [19][20][21][22][23]. In addition, PANI can be easily prepared and highly stable; moreover, it also has rich information and complex redox reaction.…”

Electrochemical Sensing of Amoxicillin Drug-Assisted Uropathogenic E. coli Bacteria Using Gold Nanostructures—A Preliminary Study

“…Nanomaterials are the leading cutting-edge research for the rapid development of point-of-care (POC) diagnostic tools due to their unique size-dependent properties, which make these materials superior and crucial in improving the patient's quality of life [27][28][29]. In particular, the use of gold nanoparticles is commonly exploited in biosensing applications due to their improved conductivity, biocompatibility, comparatively low toxicity, and improved analytical signal-to-noise ratio [22,[30][31][32][33]. Antibiotics are also known as antibacterial agents, which are commonly used for the prevention and treatment of bacterial infections [34][35][36][37][38].…”