Catalytic ability of graphene per se is limited ex: ORR etc..... but it is an excellent  substrate for traditional metal catalysts provided you achieve good dispersion and distribution of the metal nano-particles.

yes ,because of high surface area and unique electronic properties it is one of the best catalyst supports. catalyst nanoparticles can be dispersed on graphene with  high homogeneity.

Consider the following paper

Huang, C., et al. (2012). "Graphene based catalysts." Energy & Environmental Science 5(10): 8848-8868.

Graphene has certainly unique if not extraordinary properties. These include excellent heat and electrical conductivity. Good heat transfer ability is essential in the pratical application of heterogeneous or heterogenized catalyst. Furthermore, it has remarkable mechanical strength and relatively easy to functionalize for immobilization. One big disadvantage is its featherly light weight. For this reason, so far it could only be used between much heavier and transparent layers or by other type of trapping for industrial purposes.

What is the oxidative decomposition temperature of Graphene.  It may be after 200 C.I hope it is difficult to do a reaction at higher to this temperature. 

@Venkatathri....

Depends on the crystallinity of graphene.. onset of thermal degradation in chemically derived graphene(CDG) usually starts at 200C, but it is mainly due to amorphous carbon impurities or remanants oxygen groups.. most intense thermal degradation occurs only above 600C in highly crystalline graphene. Ex: doi:10.1038/srep01378

Carbons are in general good supports for catalysts (just be careful not to burn them).

Graphene is of course a carbon, the problem is that in catalysis you generally need a high surface area of support to achieve good dispersion of a catalyst. Graphene layer  themselves have of course a high surface (~2600 m2/g) but other properties, are also needed in catalyst supports (inertness, mechanical stability, wettability, etc). Maybe even to reach a good accessibility (diffusion of reactants/products) will be challenging.

I think graphene has excellent theoretical properties, but since it is so new and different to more common supports, its application is challenging (and interesting!).

There is lot of work is going on graphene and graphene oxide as catalyst support. In fact recently one group used only graohene oxide as a catalyst for oxidation reaction. Due to its high surface it is attracted by the researchers. Its choice as a catalyst support depends on the catalyst application.  

Graphene is well know to be as best catalyst support for both metal and metal oxide nano particles. In the case of the metal nano particles the use of graphene will improve the nanoparticles dispersion and increase the catalytic activity.  By integrating graphene with metal oxide nanoparticles it improves the conductivity and due to synergistic effect between graphene and metal oxide nanoparticles the catalytic activity gets improved. The presence of the graphene will also help in avoiding the mixed phase of the metal oxide nanostructures. The nature of the carbon support also matter in the catalytic ability. it has been shown very well that the nitrogen doped graphene sheets are better catalytic support when compared with reduced graphene oxide sheets. There few articles have mentioned nitrogen doped CNT are better catalyst support for the metal oxide nanoparticles than the nitrogen doped reduced graphene sheets.

To date there have been numerous articles published demonstrating that the use of the graphene based materials as support the catalytic activity is greatly improved. 

look at this article: Strongly Coupled Inorganic/Nanocarbon Hybrid Materials for

Advanced Electrocatalysis

Carbocatalysis by Graphene-Based Materials - review

dx.doi.org/10.1021/cr4007347

will help you 

Tricky question so to say. Difficult to say it ll be good for all most all catalytic applications. It cant be used for large scale applications n its having limitations in organic transformation reactions.. 

Dear Das

Please, what do you mean by "s having limitations in organic transformation reactions.. ". I used TiO2 (Commercial P25)/GO composite for degradation of carbofuran and I found that it suppresses the photocatalytic activity of P25. I found that the P25 a lone has a higher activity than P25/GO.

May you help me in this issue

Regards,