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Application of Synthesized NaA Nanozeolite as a Novel Supported Electrode for the Formaldehyde Electro‐catalytic Oxidation
Author(s) -
HassaninejadDarzi S. K.
Publication year - 2018
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201700056
Subject(s) - electrode , catalysis , formaldehyde , materials science , mesoporous material , nuclear chemistry , detection limit , specific surface area , amperometry , particle size , carbon paste electrode , electrochemistry , chemistry , analytical chemistry (journal) , cyclic voltammetry , chromatography , organic chemistry
Nickel hydroxide doped NaA nanozeolite carbon paste electrode (Ni(OH) 2 ‐NaA/CPE) was employed as simple and efficient sensor for electro‐catalytic oxidation and detection of formaldehyde (HCHO). For this goal, organic template free synthesis of NaA nanozeolite under room‐temperature was performed and characterized. Field emission scanning electronic microscopy (FESEM) technique exhibited the presence of spherical NaA nanozeolite morphology with particle size under 100 nm. The BET surface area and average pore diameter of synthesized NaA nanozeolite were obtained to be 3.622 × 10 2 m 2 g −1 and 5.9 nm, respectively. Carbon paste electrode (CPE) was modified by NaA nanozeolite and then Ni 2+ ions incorporated to this electrode to obtain Ni‐NaA/CPE. The values of electron transfer coefficient and mean value of catalytic rate constant for HCHO and redox sites of Ni(OH) 2 ‐NaA/CPE were caculated to be 0.58 and 8.42 × 10 6 cm 3 mol −1 s −1 , respectively. The results indicate that Ni(OH) 2 ‐NaA/CPE displays good electrocatalytic activity with respects to HCHO oxidation owing to its mesoporous structure and the large surface area of NaA nanozeolite. Moreover, amperometric studies exhibited that the fabricated electrode has a detection limits of 2.0 μM allowing the quantitative analysis of HCHO in the concentration range from 6.0 × 10 −3 to 2.31 × 10 −1 mM with high sensitivity (1.6716 × 10 3 μA mM −1 ).