A novel electrochemical sensor for formaldehyde based on palladium nanowire arrays electrode in alkaline media

A novel formaldehyde sensor based on the pseudocapacitive catalysis of birnessite

“…The decrease in sensitivity at higher FA concentration can be ascribed to the saturation of active Mn sites. The performance of L-Bir/GC is better than or comparable to those of most electrodes modified with noble metal particles [2][3][4][5] and enzymes [6,7,13] with respect to sensitivity, detection limit, and linear region. Ethanol, methanol, acetic acid, formic acid, and acetaldehyde at a concentration of 0.1 mM were tested as probable interferences in the electrochemical oxidation of FA, where no steady state current was observed.…”

“…Among them, electrochemical approaches are advantageous with respect to low cost, high sensitivity, stability, and the capabilities for on-site and in real-time measurements with a small volume of the analyte. The electrochemical detection of FA in solution can be classified into two types: one is based on the electrodes modified with novel metals such as Au, Pt, and Pd [1][2][3][4][5]; the other consists of biological components such as formaldehyde dehydrogenase (FDH) and alcohol oxidase (AOX) [6][7][8][9][10][11][12][13]. The former substances are not only expensive, but they are also good catalysts for oxidation of other small organic molecules such as methanol and formic acid.…”

Application of Synthesized NaA Nanozeolite as a Novel Supported Electrode for the Formaldehyde Electro‐catalytic Oxidation

“…Ni-CoVSB-5/CPE a 1.80 10 5 -- [3] Ni/IL/CPE b 1.58 10 6 -- [13] Ni(OH) 2 /POT(TX-100)/CNTPE c 1.1 10 5 -- [15] Ni/P(NMA)/MCPE d 8.96 10 4 -- [16] Ni/ANA/CPE e 7.56 10 4 -- [17] Ni-P/CPE f 1.7 10 4 20-11,500 5.8 [18] Ni(OH) 2 -X/CPE g 6.1 10 4 -- [19] Pd NW/GCE h -2-1,000 0.5 [65] Pd-CPE -33-3,300 17 [66] Ag-Pd/Ch-IL/GCE k -60-20,000 22 [67] Pt-Pd/Nafion/GCE -10-1,000 3 [68] CuO/GCE 2.5 10 7 1-10,000 0.25 [69] Ni/P(1,5-DAN)/MCPE l 2 10 6 -- [70] Ni-HTN/CPE m 2.65 10 4 -- [71] Ni(OH) 2 -NaA/CPE n 8. HCHO concentration is depicted in Figure 12b that consisted of two linear segments in the concentration ranges of 0.006 to 0.072mM and 0.072 to 0.231mM, respectively.…”

Ethylenediaminetetraacetic acid mediated synthesis of palladium nanowire networks and their enhanced electrocatalytic performance for the hydrazine oxidation reaction

“…When the hard templates (such as aluminum oxide [15] and polycarbonate membranes [16]) are used, the obtained Pd-NWNWs generally have low ECSA because of the big pore diameter of template. Although high-quality Pd-NWNWs are synthesized form the reduction of the PdCl 2 solution via galvanic replacement reactions with Te nanowires [13] and Ag nanowires [17], the two-step preparation process is slightly complicated and uneconomical.…”

“…Considering such advantages, the synthesis of 3D Pd network nanostructures consisting of 1D Pd nanowires (Pd-NWNWs) has attracted considerable attention due to their attractive structural features. Indeed, the as-prepared Pd-NWNWs generally show the enhanced electrocatalytic activity and stability for various small molecule oxidation reaction, including formic acid oxidation [12], ascorbic acid oxidation [13], ethanol oxidation [14], and formaldehyde sensing [15], etc.…”