Electrodeposition of Pt nanoparticles on undoped nanodiamond powder for methanol oxidation electrocatalysts

Diamond Nanostructures and Nanoparticles: Electrochemical Properties and Applications

“…Different kinds of diamond nanoparticles (e.g., surface graphitized diamond nanoparticles with a diamond core covered by a graphitic carbon shell, bucky diamond nanoparticles with a nanoscale diamond core surrounded by a fullerene shell, and graphene coated diamond nanoparticles) have been used as the support to load catalysts (e.g., Pt [87][88][89][90][91][92][93], Ni [94,95], Ti [96], Pd [97], Pt/Ni [98], Pt/Ru [99][100][101][102], Sn/Pb [103], Pt/Eu [91,99], and metal oxides [104][105][106]). The mostly investigated electrocatalytic reactions include electrocatalytic oxidation of methanol/formic acid/CO as well as oxygen reduction reaction.…”

“…The mostly investigated electrocatalytic reactions include electrocatalytic oxidation of methanol/formic acid/CO as well as oxygen reduction reaction. To load these catalysts on diamond nanoparticles, numerous approaches have been developed, including electrodeposition [88,92], chemical reduction [93], and microwaveassisted polyol synthesis [91,99]. For example, electrodeposition of Pt nanoparticles on un-doped diamond nanoparticles (5-100 nm in diameter) were conducted in 1.1 mM chloroplatinic acid solution.…”

“…For example, electrodeposition of Pt nanoparticles on un-doped diamond nanoparticles (5-100 nm in diameter) were conducted in 1.1 mM chloroplatinic acid solution. The electrodeposited Pt nanoparticles were well-dispersed on the facet surfaces of diamond nanoparticles [88,107]. Pt and Ru nanoparticles were chemically deposited on un-doped and boron-doped diamond nanoparticles through the use of NaBH 4 as reducing agent and sodium dodecyl benzene sulfonate as a surfactant [93].…”

“…Diamond nanoparticles with different surface terminations were used for these electrocatalytic oxidation reactions, leading to different oxidation mechanisms [89]. Towards the ability of the electrocatalytic oxidation of methanol, diamond nanoparticles with smaller diameters (e.g., 5 nm) exhibited better electrocatalytic activity than bigger ones (e.g., 100 nm) after the surface of diamond nanoparticles were coated with electrodeposited Pt nanoparticles [88,107]. The application of these Pt modified diamond electrodes in the electrochemical oxidation of hydrogen peroxide was demonstrated [92].…”

New Developments in Electrochemical Sensors Based on Poly(3,4-ethylenedioxythiophene)-Modified Electrodes

“…The use of ultrasounds in the electropolymerisation of conducting polymers on various substrates and the preparation of sonogel-based electrochemical sensors has been also reported [86][87][88][89][90][91][92]. Recently, a great deal of interest has been also devoted to the in situ preparation of Pt nanoparticles [93][94][95][96][97][98]. In this case, the in situ preparation of Pt nanoparticles has been achieved via electrochemical methods, and in particular potentiostatic deposition at a fixed potential value which is sufficiently negative to assure reduction of the appropriate precursors to metallic states.…”