Development of the sensitivity of nanostructured platinum electrodes by effect modified by adatoms (As, Sb, Pb and Sn) for electrocatalytic properties

Abstract

Adatoms on metallic surfaces appear to be inexpensive reversible surface alloys. Platinum nanostructured electrode (PtNPs) opens up new avenues in electrochemistry. The prepared platinum nanostructured on a tantalum substrate using a square wave potential regime was permitted to maintain an open circuit via a 1 × 10^–3 M solution that included an ion of one element Sb, Sn, As, or Pb. As a result, the closeness of the permanently adsorbed adatoms on the previously described Pt-nanostructured electrodes was proved by energy-dispersive X-ray spectroscopy, cyclic voltammetry and scanning electron microscopy. The electrocatalytic properties of prepared adatoms on new platinum nanostructures deposited on tantalum supporting structures were tested by the examination of electrooxidation of formic acid and methanol in 0.5 M H₂SO₄. The results of the previously mentioned tools showed the electrocatalytic characteristics of the nanoparticles ready exterior were improved by the adatoms of the four systems with varying levels of progress. The optimum conditions were set at 100 Hz frequency,  − 0.4 V, and 0.0 V below the square wave limits in addition, above at amplitude 0.4 V, to prepare nanostructured platinum deposits. The current peak (I_p) and the current of chronoamperometric (I_CA) of HCOOH solution oxidation on Pt-nanostructured Sn_ad (47 mAcm⁻², 130 µAcm⁻²) have higher values than As_ad (20 mAcm⁻², 55 µAcm⁻²), Sb_ad (34 mAcm⁻², 100 µAcm⁻²) and Pb_ad (24 mAcm⁻², 30µAcm⁻²)-Pt electrode.