An Amperometric Alcohol Sensor by Using Electroless Nickel as Working Electrode

Abstract

An amperometric alcohol sensor by using electroless nickel as working electrode was developed. The sensing results were affected by the electrolyte composition, deposition time, and temperature of the electroless nickel. The results revealed that the best operating conditions of the electroless nickel were 70 C deposition temperature, 20 min deposition time, and 2.632 ratio of reducing agent to nickel ion in the solution. The results also indicated that the response time of the prepared alcohol sensor is in the range from 10 to 13 s and the best sensitivity is 8.7 mAappm6cm 2 .

Ionic liquid ethanol sensor

“…8. Although the sensitivity of this sensing system was less than that of the traditional liquid sensor (Liao and Chou, 2000). ED 600 (MSLi) 2 was able to be successfully substituted for the solvent.…”

Arrayed CNT–Ni nanocomposites grown directly on Si substrate for amperometric detection of ethanol

“…Similar results have been reported (Weng et al, 2004). Consequently, the CNT-Ni nanocomposite structure indeed leads to a significant enhancement in sensor sensitivity due to enormous surface areas available for redox reactions, as compared to the plate-type nickel electrodes (Liao and Chou, 2000;Pang et al, 2001).…”

“…The ethanol detection mechanism of nickelbased electrodes is based on the oxidation of ethanol, at a lower electrocatalyzed potential, by the redox pair of Ni(OH) 2 /NiOOH on nickel surface in alkaline media (Sattar and Conway, 1969;Carbonio et al, 1982;Lo and Hwang, 1995). However, these two-dimensional plate-type nickel electrodes provide relatively insufficient surface area and thus showed marginal catalytic activity towards the oxidation of ethanol (Liao and Chou, 2000;Pang et al, 2001). Nevertheless, the sensing performance of the Ni-based electrochemical sensors had been considerably improved by increasing surface area of the electrodes by using nanostructured nickel (Weng et al, 2004).…”

“…To overcome the disadvantages of enzymatic methods mentioned above, electrodes based on pure nickel or nickel-coated substrates have appeared to be promising alternatives for electrochemical ethanol sensing (Liao and Chou, 2000;Pang et al, 2001;Weng et al, 2004). The ethanol detection mechanism of nickelbased electrodes is based on the oxidation of ethanol, at a lower electrocatalyzed potential, by the redox pair of Ni(OH) 2 /NiOOH on nickel surface in alkaline media (Sattar and Conway, 1969;Carbonio et al, 1982;Lo and Hwang, 1995).…”

Amperometric Biochemical Characterization of Isolated Fungal Strains

“…Assimilation characteristics of various microorganisms such as molds, yeasts, bacteria, and actinomycetes have been tested with various substrates. Key metabolites or the rate of their overall metabolic reactions ATP, NADH, cytochrome content and DNA are suitable for describing the physiological state [11][12][13][14][15][16][17][18].…”