Studies of the chemical functionalisation of diamond electrodes

Generator−Collector Experiments at a Single Electrode: Exploring the General Applicability of This Approach by Comparing the Performance of Surface Immobilized versus Solution Phase Sensing Molecules

“…We also note that the method of surface modification using diazonium salts can be applied to several other commonly used electrode substrates other than carbon, such as silicon, iron, cobalt, nickel, copper, zinc platinum, gold, and boron-doped diamond. [41][42][43][44][45] We envisage that, by careful choice of molecular probe (i.e., probes that have redox potentials sufficiently close to the system of interest or are selectively reactive toward intermediates generated in a mechanism under consideration), the…”

“…However, in certain circumstances (such as the example provided herein where the molecular probe is pH-sensitive and the p K a values of the molecular probe are increased from their solution-phase values by attachment to the graphite surface) − using a surface-bound molecular pH probe may be preferable. We also note that the method of surface modification using diazonium salts can be applied to several other commonly used electrode substrates other than carbon, such as silicon, iron, cobalt, nickel, copper, zinc platinum, gold, and boron-doped diamond. − We envisage that, by careful choice of molecular probe (i.e., probes that have redox potentials sufficiently close to the system of interest or are selectively reactive toward intermediates generated in a mechanism under consideration), the approach we have outlined in this report can readily be extended to study the kinetics and mechanisms of a wide range of interesting chemical or biochemical reactions.…”

Nano-crystalline diamond electrodes with cap layer decorated by gold particles

“…In addition, conductive and chemically inert NCD layers may represent a promising support for nano-particles in various electrochemical applications like methanol oxidation [8][9][10], oxygen reduction [11] and bio-chemical sensing [12]. Several different techniques have been applied for deposition of chemically active particles on diamond surfaces, including electrodeposition in electrolytes [8,9,11], microemulsion [7], ion implantation [13] and local electrical discharge [14].…”

Comparative Proton Coupled Electron Transfer at Glassy Carbon and Boron‐Doped Diamond Electrodes

“…However, in these experiments, the quinone groups were directly part of the BDD surface, generated by the oxidation of laser‐ablated regions of sp 2 below the electrode surface. To the best of our knowledge, the only example of anthraquinone attached in a monolayer onto a BDD surface is by Foord et al., who directly grafted 9,10‐anthraquinone diazonium to the surface of a BDD electrode, and whom only studied the electron transfer in the highly basic region [22] …”