The detailed morphology and composition of the as-generated GO and Pd/GO were examined by SEM, TEM, EDX and FTIR. As can be seen from SEM images, GO is formed with a typical crumpled surface structure due to the chemical exfoliation (Fig. 1A). Nevertheless, the crumpled surfaces of GO change to multilayered and defective surfaces with the Pd nanoparticles decorated (Fig. 1B). The rougher surfaces and layered structure of the Pd/GO nanocomposite could significantly increase the effective
