Formaldehyde Electro‐catalytic Oxidation onto Carbon Paste Electrode Modified by MIL‐101(Cr) Nanoparticles

Abstract

In this paper, MIL‐101(Cr) metal‐organic framework (MOF) has been rapidly synthesized via microwave heating and fully characterized using powder X‐ray diffraction (PXRD), field emission scanning electronic microscopy (FESEM), Fourier transform infrared (FT‐IR) and nitrogen adsorption/desorption isotherm. FESEM image of MIL‐101(Cr) MOF displays spherical particles with a uniform morphology and particle size under 100 nm. The BET surface area and average pore diameter of synthesized MIL‐101(Cr) MOF were obtained to be 7.266 × 102 m2 g−1 and 3.28 nm, respectively. Nickel hydroxide dispersed onto MIL‐101(Cr) nanoparticles modified carbon paste electrode (Ni(OH)2‐MIL/CPE) was employed for electro‐catalytic oxidation of formaldehyde (CH2O) in the alkaline medium. The mean value of electron‐transfer coefficient, charge‐transfer rate constant and surface coverage of the Ni(OH)2‐MIL/CPE are found to be 0.517, 0.0058 s−1 and 7.88 × 10−8 mol cm−2, respectively. Also, the mean value of catalytic rate constant and diffusion coefficient of CH2O in the modified electrode surface are calculated to be 2.37 × 102 cm3 mol−1 s−1 and 1.288 × 10−6 cm2 s−1, respectively. The results indicate that Ni(OH)2‐MIL/CPE displays good electrocatalytic activity to the CH2O oxidation owing to porous structure and the large surface area of MIL‐101(Cr) MOF.

Bimetallic nickel/manganese phosphate–carbon nanofiber electrocatalyst for the oxidation of formaldehyde in alkaline medium

“…Also, the peak separation DE p increases with increasing scan rate from 5 to 200 mV s À1 . 15 The peak potential separation at scan rates n ¼ 10, 20, 50, 100, and 200 mV s À1 are estimated to be DE p ¼ 206, 242, 273, 304, and 369 mV s À1 respectively, which points to the quasi-reversible characteristic of the process (i.e., DE p > 59/n mV s À1 ). Fig.…”

“…For instance, formaldehyde is used as a keystone for the insight of partial methanol oxidation in direct methanol fuel cells (DMFC). [13][14][15] Also, formaldehyde is utilized in diverse industrial applications such as textile manufacture, and electroless copper plating. 16 Furthermore, formate ions HCOO À that are produced during formaldehyde electrooxidation have the potential to become a prominent candidate for replacing fossil fuels in direct formate fuel cells to generate clean energy.…”

Electrochemical detection of sulfite in food samples

“…It is widely accepted that carbon paste, as one of the mixtures of graphite powder and an appropriate liquid binder, is the most flexible substrate for biological and chemical modifications. It is notable that the heterogeneous features of the CPEs, specific effects of the liquid binder, variability in the employed carbon material, and diverse proportional compositions need extensive and reliable characterization procedures [140][141][142][143][144][145]. Because of multiple beneficial features, CPEs have widespread utilization in electrochemical measurements.…”

Electrocatalytic Performance of Nickel Hydroxide-Decorated Microporous Nanozeolite Beta-Modified Carbon Paste Electrode for Formaldehyde Oxidation

“…Literature review exhibits that important attention has been engrossed in the electro-oxidation of HCHO for many years [4,[7][8][9][10][11]. Various components have been used for the HCHO electro-oxidation containing Pd electrode [12], Pt nanoparticles/GCE [13], Pt electrode [14], Pt-MnO 2 [15], Cu electrode [6], Cu-Pd [3], Cu/Pd/MWCNTs/CPE [16], Pt-Pd/CNT [17], Au nanoparticles [18], rGO/ZnO composite [19], nickel phosphate/GCE [5], Ni-Pd/GCE [20], nickel phosphate/carbon composite [21], Ni thin lm on SiO 2 /Au [22], Ni(OH) 2 -Pt/Al 2 O 3 [23], Ni(OH) 2 -MIL/CPE [24] and zeolite-modi ed electrodes containing Ni(OH) 2 [25][26][27][28][29][30].…”

“…Electrode surfaces modi cation is one of the signi cant progresses in the latest years. Ni(OH) 2 is an energetic constituent in the electrochemistry because of its sharp redox presentation, high theoretical capacity and low cost [24]. According to the literature review, nanozeolite beta modi ed CPE was not applied for electrocatalytic oxidation of HCHO.…”