Preparation method of paper-graphite-copd film electrode

Abstract

The invention provides a preparation method of a paper-graphite-CoPd thin film electrode. The preparation method comprises the following steps: (1) uniformly coating ordinary paper with a mixture of graphite and clay; (2) retaining the paper coated with the graphite for 20-30 min under the voltage of 1.0V, activating the coating graphite, and then performing electro-deposition on Co for 120-150 min under the voltage of -0.8V to obtain a paper-graphite-Co thin film electrode; and (3) enabling the paper-graphite-Co thin film electrode to stand in 0.8 mmol / L<-1> of PbC12 solution for 1-3 min to obtain the paper-graphite-CoPd thin film electrode, namely a graphite coated paper loading CoPd catalyst. According to the method, with pencil coated paper, Co is subjected to electro-deposition on the surface of conducting paper coated with graphite, and then partial Co is replaced with Pd to prepare the graphite coated paper loading CoPd catalyst, so that the electroreduction performance of hydrogen peroxide is improved. The preparation method overcomes the defects of high current collector cost, hydrogen peroxide decomposition and the like, and solves the problem that hydrogen peroxide based full cells are bad in cathode activity.

Description

technical field [0001] The invention relates to a method for preparing a paper-graphite-CoPd thin film electrode, which is a method for using graphite-coated paper to load CoPd to catalyze the electroreduction performance of hydrogen peroxide. Background technique [0002] Traditional fuel cells mostly use oxygen in the air as the oxidant. However, in some special cases, such as in water and space, the source of oxygen is greatly limited (in seawater, the concentration of dissolved oxygen is low, which is difficult to achieve as an oxidant. Requirements for power supply; in space, oxygen is thin, and it is also difficult to use). Therefore, if oxygen is used as an oxidizing agent in these environments, it must be carried by itself. In recent years, H 2 o 2 It has been extensively studied as an oxidizing agent. As an oxidizing agent for underwater power sources, H 2 o 2 There are many outstanding advantages, (1) H 2 o 2 It is a liquid at normal temperature. Compared w...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention is to propose a method for preparing a paper-graphite-CoPd film electrode capable of solving the problem of poor activity of hydrogen peroxide-based fuel cell cathodes