Construction of hollow carbon polyhedron supported Pt catalyst for methanol electrocatalytic oxidation

In this work, the hollow Pt/CP (carbon polyhedron) catalyst derived from ZIF-8 was obtained via a simple hydrothermal method for electrocatalytic methanol oxidation reaction (MOR). Compared with Pt/CB (carbon black) catalyst, the hollow Pt/CP had the higher ESCA, which was 60 m(2) g(-1), while the Pt/CB was only 41 m(2) g(-1). Similarly, the I-f/I-b of the hollow Pt/CP was 7.5, which was also obviously about 3 times higher than the Pt/CB (2.5). All the results verified that the electrocatalytic oxidation activity of hollow Pt/CP was greatly better than Pt/CB. According to a series of characterizations, it can be discovered that the hollow Pt/CP catalyst derived from ZIF-8 had more rich oxygen-containing functional groups, smaller Pt nanoparticles size, more Pt content, larger specific surface area, and so on, which were good for the improvement of MOR activity. (C) 2021 Elsevier Ltd. All rights reserved.