amine structure](https://static.chemtradehub.com/structs/629/62924-61-2-0728.webp "[(2-chlorophenyl)methyl](ethyl)amine structure")
Characterization of electrocatalytic proton reduction and surface adsorption of platinum nanoparticles supported by a polymeric stabilizer on an ITO electrode
Literature Information
Publication Date
2021-12-21
DOI
10.1039/D1SE01760H
Impact Factor
6.367
Authors
Yuta Tsubonouchi, Masashi Kajita, Taichi Hayasaka, Mohamed R. Berber, Masayuki Yagi
View Original
Abstract
Platinum nanoparticles stabilized by a polymeric stabilizer of polyacrylic acid (PAA-Pt) were adsorbed on an indium tin oxide (ITO) surface from their colloidal solution due to the chemical adsorption between PAA and the ITO surface to afford a transparent PAA-Pt nanoparticle-coated electrode. The adsorption of PAA-Pt nanoparticles and their electrocatalytic proton reduction were investigated compared with the case of citrate-stabilized Pt nanoparticles (citrate-Pt). The adsorption of PAA-Pt nanoparticles is faster than that of citrate-Pt nanoparticles, ascribed to the concerted adsorption of PAA-Pt nanoparticles by the polymeric chain effect of PAA. The thermodynamic parameters for adsorption are close between citrate-Pt and PAA-Pt nanoparticles. The citrate-Pt and PAA-Pt nanoparticle-coated electrodes worked efficiently for electrocatalytic proton reduction. Although the mass activity (0.18 mA cm−2 nmol−1) of PAA-Pt/ITO for proton reduction at −1.0 V vs. Ag/AgCl was 1.4 times lower than that (0.26 mA cm−2 nmol−1) of citrate-Pt/ITO, the catalytic current for the PAA-Pt/ITO was significantly stable due to the PAA stabilizer.
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