Open AccessElectrochemical Decontamination of Platinum Nanocrystals and its Applications for Methanol Electrooxidation
Author(s) -
LeiLei Lu,
Meifang Zhu,
Yaoping Zheng,
Rong Yang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/729/1/012082
Subject(s) - polyvinylpyrrolidone , nanocrystal , cyclic voltammetry , chronoamperometry , electrochemistry , platinum , materials science , methanol , human decontamination , reducing agent , inorganic chemistry , nanotechnology , chemical engineering , catalysis , nuclear chemistry , chemistry , electrode , organic chemistry , waste management , polymer chemistry , engineering
Polyvinylpyrrolidone (PVP) is an effective surface-capping agent for engineering metal surface structure but is hardly to be thoroughly removed. In this study, the electrochemical treatment was applied for the decontamination of polyvinylpyrrolidone (PVP) on platinum (Pt) nanocrystals. Spherical, cubic, octahedral and cuboctahedral Pt nanocrystals were prepared by the colloidal method with PVP K30 as the capping agent. Electrochemical decontamination of Pt nanocrystals was performed by using square-wave potential steps and methanol electrooxidation was used as a probe reaction. High-frequency potential steps were set up between a high voltage and a low voltage to avoid surface distortion. Cyclic voltammetry (CV) and chronoamperometry measurements were used to evaluate the catalytic activity of the cleaned Pt nanocrystals for methanol. The results showed that electrochemical decontamination was an effective way to clean Pt nanocrystals and the cuboctahedral Pt nanocrystals displayed the best electrocatalytic activity for methanol electrooxidation.