Platinum nanoparticle decorated vertically aligned graphene screen-printed electrodes: electrochemical characterisation and exploration towards the hydrogen evolution reaction

Abstract

We present the fabrication of platinum (Pt0) nanoparticle (ca. 3 nm average diameter) decorated vertically aligned graphene (VG) screen-printed electrodes (Pt/VG-SPE) and explore their physicochemical characteristics and electrocatalytic activity towards...

Silver Inkjet-Printed Electrode on Paper for Electrochemical Sensing of Paraquat

“…From the calculated ψ values, the k 0 value for the [Ru(NH 3 ) 6 ]Cl 3 redox reaction was determined to be 0.0040 cm s −1 . The value is better than or comparable to the same parameter obtained using a paper graphitic SPE electrode (0.0012 cm s −1 ) [37] and (0.00072 cm s −1 ) [38] and a platinum nanoparticle-decorated vertically aligned graphene SPE electrode (0.0041 cm s −1 ) [39].…”

“…(1 − 0.017 ∆ ) From the calculated ψ values, the k 0 value for the [Ru(NH3)6]Cl3 redox reaction was determined to be 0.0040 cm s −1 . The value is better than or comparable to the same parameter obtained using a paper graphitic SPE electrode (0.0012 cm s −1 ) [37] and (0.00072 cm s −1 ) [38] and a platinum nanoparticle-decorated vertically aligned graphene SPE electrode (0.0041 cm s −1 ) [39]. The heterogeneous electron transfer constant (k 0 ) was also estimated from the same cyclic voltammetry data at different scan rates by applying the Nicholson method (for quasi-reversible systems controlled by diffusion) [35].…”

Enhancing the efficiency of the hydrogen evolution reaction utilising Fe3P bulk modified screen-printed electrodes via the application of a magnetic field

“…HER onset potential values of −0.53, −0.21, −0.20, −0.19 and −0.17 V ( vs. RHE) are exhibited by the bare SPE, 5% Fe 2 P SPE Raw , 10% Fe 2 P SPE Raw , 20% Fe 2 P SPE Raw and 40% Fe 2 P SPE Raw , respectively (NB: the HER onset potential is defined as the point at which the observed current deviates from the background current by −25 μA cm −2 ). 59 The most electronegative HER onset potential is displayed by the bare SPE, where the graphitic carbon layer is solely responsible for the observed HER catalysis; this response is as expected and observed previously. The closest HER onset potential to the Pt electrode is obtained using the 40% Fe 2 P SPE Raw , which possesses the highest loading of the Fe 2 P catalyst, therefore the highest number of electroactive sites.…”

Electroanalytical overview: utilising micro- and nano-dimensional sized materials in electrochemical-based biosensing platforms

“…The size and morphology of nanoparticles have strong influence on their electronic, magnetic, and catalytic properties [14]. As such, they have received strong interest in a plethora of fields of research, such as medical imaging and drug delivery applications [91][92][93], fuel cells [94,95], optical sensing [96,97] and of course electrochemical sensing applications [98,99]. Nanoparticles have been used extensively in the development of electrochemical biosensors due to their advantageous properties that they bring to the platforms.…”