Metal-free boron-doped-charcoal-material hydrogen peroxide (H2O2) electroreduction catalyst and preparation method thereof

Abstract

The invention provides a metal-free boron-doped-charcoal-material hydrogen peroxide (H2O2) electroreduction catalyst and a preparation method thereof. The method comprises the steps of uniformly mixing triphenyl borane and a charcoal material according to the mass ratio of (3-5):(97-95), milling the mixture for 3-5 hours in a ball mill at the speed of 3,000-5,000r / min, putting the milled mixture in a heating furnace, firstly introducing argon gas for 10 minutes, reacting for 5-6 hours at the temperature of 750-850 DEG C under the protection of the argon gas, and cooling to room temperature under the protection of the argon gas, thereby obtaining the metal-free boron-doped-charcoal-material H2O2 electroreduction catalyst. According to the metal-free boron-doped-charcoal-material H2O2 electroreduction catalyst and the preparation method thereof, a B-C bond is formed through substituting carbon with electron-deficient boron, and superfluous positive charges are generated nearby a boron atom, so that H2O2 adsorption is facilitated; the raw materials are wide in source and are cheap; the boron-doped activated charcoal catalyst is high in electrochemical activity, good in stability and strong in toxicity resisting capability; due to the absence of precious metals or transition metals, the occurrence of H2O2 hydrolysis reaction can be inhibited, and the generation of oxygen gas is reduced; the electro-oxidation property and utilization ratio of H2O2 are greatly improved.

Description

technical field [0001] The invention relates to a hydrogen peroxide electroreduction catalyst, and the invention also relates to a preparation method of the hydrogen peroxide electroreduction catalyst. Background technique [0002] The oxidant of fuel cells is mostly air (O 2 ), but under conditions such as underwater or space, since there is no air, the oxidant is usually liquefied oxygen or compressed oxygen. The existence of an oxygen storage device not only reduces the energy density of the fuel cell, but also causes problems such as safety. as liquid H 2 o 2 Fuel cells for oxidants, such as direct NaBH 4 -H 2 o 2 Fuel Cells and Metals - H 2 o 2 Semi-fuel cells, etc., have become a research hotspot. with O 2 compared to H 2 o 2 Fuel cells with an oxidant have a greater advantage because O 2 The reduction of is a 4-electron process with a slow reduction rate, while the H 2 o 2 The reduction of is a 2-electron process with a low activation overpotential; with...

AI Technical Summary

Problems solved by technology

This leads to H 2 o 2 Problems of low electroreduction performance and low utilization