Hydrothermal Synthesis of Titanium‐Supported Nickel Nanoflakes for Electrochemical Oxidation of Glucose

Abstract

Titanium-supported nanoscale flaky nickel electrode (nanoNi/Ti) was prepared by a hydrothermal process using hydrazine hydrate as a reduction agent. Its electrocatalytic activity as an electrocatalyst for the electrooxidation of glucose was evaluated in alkaline solutions using cyclic voltammetry (CV), chronoamperometric responses (CA) and electrochemical impedance spectra (EIS). The nanoNi/Ti electrode exhibits significantly high current density of glucose oxidation. A high catalytic rate constant of 1.67 Â 10 6 cm 3 mol À1 s À1 was calculated from amperometric responses on the nanoNi/Ti electrode. Low charge transfer resistances on the nanoNi/Ti in 0.5 M NaOH containing various concentrations of glucose were obtained according to the analysis for EIS. Furthermore, amperometric data show a linear dependence of the current density for glucose oxidation upon glucose concentration in the range of 0.05 -0.6 mM with a sensitivity of 7.32 mA cm À2 mM À1 . A detection limit of 0.0012 mM (1.2 mM) M glucose was found. Results show that the prepared nanoNi/Ti electrode presents high electrocatalytic activity for glucose oxidation.

Preparation of the carboxylic acid-functionalized graphene oxide/gold nanoparticles/5-amino-2-hydroxybenzoic acid as a novel electrochemical sensing platform

“…2) that catalyzes the electrochemical oxidation reaction of urea. Similar mechanisms have been reported in the electrochemical oxidation of other organic compounds like methanol [44], ethanol [45], aspirin [46], glucose [47], and cyclohexanol [48] using nickel-based catalyst in alkaline medium. Fleischmann et al [49] suggested that Ni(III)OOH acts as an electrocatalyst for the oxidation of organic molecules and it involves charging of the oxide layer followed by a chemical reaction between Ni(III)OOH and the organic molecule.…”

Eletrodos modificados por hidróxido de níquel: um estudo de revisão sobre suas propriedades estruturais e eletroquímicas visando suas aplicações em eletrocatálise, eletrocromismo e baterias secundárias

“…Para efeitos de comparação, também são mostrados alguns trabalhos envolvendo outros materiais catalíticos na detecção de glicose e biossensores, empregando a enzima Glicose oxidase. [67][68][69][70][71][72][73][74][75] Embora seja um material com alta propriedade eletrocatalítica, um dos problemas encontrados na utilização do Ni(OH) 2 em dispositivos analíticos é sua falta de especificidade; desta forma, é necessário um pré-tratamento da amostra, especialmente para que seus componentes sejam separados. A facilidade de modificação de qualquer tipo de eletrodo com o Ni(OH) 2 A eletrocatálise apresentada pelo hidróxido de níquel também abre a possibilidade de estudos envolvendo formas alternativas de geração de energia.…”

Copper/nickel nanoparticle decorated carbon nanotubes for nonenzymatic glucose biosensor

“…[2,[18][19][20][21][22][23], and alloys (NiCo, CuNi, NiTi, NiCr, etc.) [24][25][26][27] for constructing nonenzymatic glucose sensors. Among these relatively low-cost bimetallic alloys, CuNi particles by virtue of excellent stability, good electrocatalytic activity, and resistance to poisoning are of particular interest, which makes them ideal candidates for nonenzymatic glucose sensor.…”