Methane hydrate growth on a graphene substrate

When methane hydrate was formed from a water droplet on a graphene substrate, a hydrate film initially appeared on the free water surface and then slowly grew across the graphene surface to completely or partially cover the entire visible graphene surface. Water for film growth came from the film-covered droplet and caused collapse of the initially formed hydrate film. These observations explained the mechanism by which graphene and graphite promoted gas hydrate nucleation.