Computational studies for reduced graphene oxide in hydrogen-rich environment

TL;DR

This study uses molecular dynamics simulations to explore how hydrogen-rich environments can effectively reduce graphene oxide, preserving graphene's structure and improving its quality by identifying beneficial chemical pathways.

Contribution

It introduces a detailed molecular dynamics approach to understand the reduction process of graphene oxide in hydrogen environments, highlighting mechanisms that enhance graphene quality.

Findings

Hydrogen concentration and pressure influence oxygen removal from GO.

Formation of water and suppression of carbonyl holes improve graphene quality.

Hydrogen facilitates the formation of hydroxyl and epoxy groups.

Abstract

We employ molecular dynamic simulations to study the reduction process of graphene-oxide (GO) in a chemically active environment enriched with hydrogen. We examine the concentration and pressure of hydrogen gas as a function of temperature in which abstraction of oxygen is possible with minimum damage to C-sp$^2$ bonds hence preserving the integrity of the graphene sheet. Through these studies we find chemical pathways that demonstrate beneficiary mechanisms for the quality of graphene including formation of water as well as suppression of carbonyl pair holes in favor of hydroxyl and epoxy formation facilitated by hydrogen gas in the environment.