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Enhancing the Dispersion of Cu-Ni Metals on the Graphene Aerogel Support for Use as a Catalyst in the Direct Synthesis of Dimethyl Carbonate from Carbon Dioxide and Methanol
journal contribution
posted on 2020-05-21, 18:35 authored by Varisara Deerattrakul, Apichaya Panitprasert, Pralachoak Puengampholsrisook, Paisan KongkachuichayGraphene
has attracted attention because of its interesting properties
in catalyst applications including as a catalyst support; however,
it is known that the graphene can be restacked, forming a graphite-like
structure that leads to poor specific surface area. Hence, the high-porosity
graphene aerogel was used as a Cu–Ni catalyst support to produce
dimethyl carbonate (DMC) from carbon dioxide and methanol. In this
work, we have introduced a new synthesis route, which can improve
the dispersion of metal particles on the graphene aerogel support.
Cu–Ni/graphene aerogel catalysts were synthesized by a two-step
procedure: forming Cu–Ni/graphene aerogel catalysts via hydrothermal
reduction and then Cu–Ni loading by incipient wetness impregnation.
It is found that the catalyst prepared by the two-step procedure exhibits
higher DMC yield (25%) and MeOH conversion (18.5%) than those of Cu–Ni
loading only by an incipient wetness impregnation method. The results
prove that this new synthesis route can improve the performance of
Cu–Ni/graphene aerogel catalysts for DMC production.