Defective graphene@diamond hybrid nanocarbon material as an effective and stable metal-free catalyst for acetylene hydrochlorination

Abstract

A defective nanodiamond–graphene material (ND@G) exhibits superior catalytic activity in acetylene hydrochlorination with an acetylene conversion of 50%, selectivity to vinyl chloride of up to 99.5% at 220 °C, and a C₂H₂ gas hourly space velocity of 300 h⁻¹, which is the first example of a metal-free catalyst with comparable performance to that of the 0.25% Au/C catalyst.