Electrodeposition of gold nanoparticles on boron doped diamond electrodes for the enhanced reduction of small organic molecules

• Published in: Journal of electroanalytical chemistry (Lausanne, Switzerland) Vol. 801; pp. 521 - 526
• Main Authors: Bottari, F., De Wael, K.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.09.2017; Elsevier Science Ltd
• Subjects: Antibiotics; Boron; Boron doped diamond; Chloramphenicol; Chloromycetin; Correlation coefficients; Diamonds; Electrochemistry; Electrodeposition; Electrodes; Gold; Gold nanoparticles; Nanoparticles; Organic chemicals; Organic chemistry; Reduction; Electrodeposition; Chloramphenicol; Boron doped diamond; Gold nanoparticles
• ISSN: 1572-6657; 1873-2569
• DOI: 10.1016/j.jelechem.2017.07.053

The performance of gold nanoparticles electrodeposited on boron doped diamond (BDD) electrodes was investigated in respect to the reduction of chloramphenicol (CAP), an antibiotic of the phenicols family. The chosen deposition protocol, three nucleation-growing pulses, shows a remarkable surface coverage, with an even distribution of average-sized gold particles (~50nm), and it was proven capable of generating a three-fold increase in the CAP reduction current. A calibration plot for CAP detection was obtained in the micromolar range (5–35μM) with good correlation coefficient (0.9959) and an improved sensitivity of 0.053μAμM−1mm−2 compared to the electrochemistry of CAP at a bare BDD electrode. [Display omitted] •Three nucleation-growing pulses deposition gives a high surface coverage, with AuNPs of 50nm in diameter.•The sensitivity of BDD towards CAP reduction is enhanced by the presence of AuNPs.•AuNPs modified boron doped diamond electrodes successfully increase the signal for reduction of small organic molecules.