Various sources such as https://news.ycombinator.com/item?id=7679154 speculate that graphene will combust at higher temperatures.
Is this true? Is the flash point/ temperature of combustion for graphene known?
Graphene combusts at 620 K. See http://pubs.acs.org/doi/abs/10.1021/jp410044v.
It is postulated that it burns at this temperature "because of a large interlayer spacing of graphene sheets (i.e., 5.1 Å)".
it(graphene) has a high specific surface area of ca. 1168 m2 g–1 and starts to burn at 350 °C because of a large interlayer spacing of graphene sheets (i.e., 5.1 Å).
Graphene is made from carbon atoms, just like diamond and graphite. Just like diamond and graphite, it will burn in oxygen.