Formation of a Ni(OH)2/NiOOH active redox couple on nickel nanowires for formaldehyde detection in alkaline media

Trafela, Špela; Zavašnik, Janez; Šturm, Sašo; Rožman, Kristina Žužek

doi:10.1016/j.electacta.2019.04.060

Cited by 103 publications

(68 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These peaks are normally associated with the formation of oxidized species on the electrode surface and its subsequent reduction. It has been reported in literature, that in the case of pure nickel these peaks correspond to species of Ni(OH)2 and NiOx only, 45,48 while in composite electrodes, we also expect peaks for the redox activity of the SC. In order to understand the HER, electrochemistry and kinetics of the process using Ni|SC electrodes were studied using Tafel analysis (Figure S10 and Table 3).…”

Section: Resultssupporting

confidence: 62%

Evaluation of different Ni–semiconductor composites as electrodes for enhanced hydrogen evolution reaction

Gómez

Llorente

Hainer

et al. 2020

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

Section: Resultssupporting

confidence: 62%

Evaluation of different Ni–semiconductor composites as electrodes for enhanced hydrogen evolution reaction

Gómez

Llorente

Hainer

et al. 2020

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

“…This is related to the electrode internal resistance, which limits the charge transfer at high scan rates. At lower scan rates, a pair of redox peaks could be seen in each CV curve, indicating the Faradic reaction of Ni(II)/Ni(III) [26,42] due to the reversible phase change between Ni(OH) 2 and NiOOH (0.44 V and 0.18 V) [43]. By scanning the electrode, the OH − ions will be dispersed on the surface of Ni(OH) 2 layer and form the NiOOH phase, as shown in Equation 6:…”

Section: Electrochemical Measurement Of the Nimoo 4 Nps And Nimoo 4 /mentioning

confidence: 99%

Synthesis of a NiMoO4/3D-rGO Nanocomposite via Starch Medium Precipitation Method for Supercapacitor Performance

et al. 2020

View full text Add to dashboard Cite

This paper presents research on the synergistic effects of nickel molybdate and reduced graphene oxide as a nanocomposite for further development of energy storage systems. An enhancement in the electrochemical performance of supercapacitor electrodes occurs by synthesizing highly porous structures and achieving more surface area. In this work, a chemical precipitation technique was used to synthesize the NiMoO4/3D-rGO nanocomposite in a starch media. Starch was used to develop the porosities of the nanostructure. A temperature of 350 °C was applied to transform graphene oxide sheets to reduced graphene oxide and remove the starch to obtain the NiMoO4/3D-rGO nanocomposite with porous structure. The X-ray diffraction pattern of the NiMoO4 nano particles indicated a monoclinic structure. Also, the scanning electron microscope observation showed that the NiMoO4 NPs were dispersed across the rGO sheets. The electrochemical results of the NiMoO4/3D-rGO electrode revealed that the incorporation of rGO sheets with NiMoO4 NPs increased the capacity of the nanocomposite. Therefore, a significant increase in the specific capacity of the electrode was observed with the NiMoO4/3D-rGO nanocomposite (450 Cg−1 or 900 Fg−1) when compared with bare NiMoO4 nanoparticles (350 Cg−1 or 700 Fg−1) at the current density of 1 A g−1. Our findings show that the incorporation of rGO and NiMoO4 NP redox reactions with a porous structure can benefit the future development of supercapacitors.

show abstract

“…2 through 7. anodic peak currents (Iox) were reached when the surface concentration of [Fe(CN)6 4was depleted, causing the anodic peak current (Iox) (Kissinger and Heineman 1983;Pečko 2014;Trafela 2020). The anodic peak currents (Iox) with positive values were observed at the potential of Eox, which can be attributed to the oxidation reaction: [Fe(CN)6 4-→ [Fe(CN)6 3-+ e- (Cinti et al 2017;Elgrishi et al 2018).…”

Section: Cyclic Voltammetry Resultsmentioning

confidence: 99%

Comparison of cyclic voltammetry measurements of paper-based screen printed electrodes via proprietary and open source potentiostat

Karlovits

Kavčič

Trafela

et al. 2021

BioRes

Self Cite

View full text Add to dashboard Cite

The use of screen-printed electrodes in different monitoring applications, e.g., polluted water, biotechnology, agriculture, industrial process control, and other applications, are continuously being developed. New cheap and open-source potentiostats have been recently emerging, in addition to the commercial and proprietary solutions on the market. In this study, paper-based, screen-printed electrodes were utilised as an alternative solution for ceramic-based electrodes and were tested with two potentiostats (proprietary and low-cost open-source running on wireless 64 bit Linux system installed on Raspberry Pi 3+). Unique paper substrates made from invasive plant papers and one commercial product were used for screen electrode printing. Ink layer thicknesses variations and mechanical grinding were applied, and cyclic voltammetry measurements were conducted. The variation in cyclic voltammetry measurements could be attributed to two sources: the potentiostats showed differences in their sensibility and signal values, and paper surface and structure also contributed to differences. Simultaneously, the additional processing steps, e.g., mechanical grinding, introduced additional measurement variations and differences in the measurement process.

show abstract

Formation of a Ni(OH)2/NiOOH active redox couple on nickel nanowires for formaldehyde detection in alkaline media

Cited by 103 publications

References 48 publications

Evaluation of different Ni–semiconductor composites as electrodes for enhanced hydrogen evolution reaction

Evaluation of different Ni–semiconductor composites as electrodes for enhanced hydrogen evolution reaction

Synthesis of a NiMoO4/3D-rGO Nanocomposite via Starch Medium Precipitation Method for Supercapacitor Performance

Comparison of cyclic voltammetry measurements of paper-based screen printed electrodes via proprietary and open source potentiostat

Contact Info

Product

Resources

About