Synthesis of functionalized graphene d and its application for oxygen reduction catalyst

In this work for the first time, used of the cholrosulfonic acid for efficiently exfoliate the pristine graphite directly into edge-selectively sulfonated graphene (SG). The procedure demonstrated inthe present study is simple, low-cost, and facile one-pot approach to produce SG with any irreversible lattice damage to the hexagonal carbon plane. SG displayed a good electrical conductivity and charge transfer rate in comparison to GC. The sulfuric acid at the edge ofgraphene exhibits excellent electrocatalytic activity with a better fuel selectivity with a longerterm stability than those of the pristine graphite and commercial Pt/C electrocatalysts. Therefore, the SG developed in this study shows broad applications related to ORR such as alkaline fuel cells and metal air batteries.

کلیدواژه ها:

Sulfonated graphene ، Oxygen reduction reaction ، Metal-free electrocatalysts ، Fuel cell