Additional file 1.

Figure S1. UV-Vis-NIR absorption spectra of the Au NRs. Figure S2. TEM images of Au NRs (A) and Au NRs/graphene hybrid composites with weight ratios: 2:1 (B), 5:1 (C). Scale bar: 200 nm. Figure S3. Cyclic voltammetric curves of the following electrocatalysts: (a) graphene; (b) graphene/Au@Pt NRs; (c) graphene/Au@Pt0.34Ag0.66 NRs; (d) graphene/Au@Pt0.57Ag0.43 NRs; (e) graphene/Au@Pt0.64Ag0.36 NRs in 0.5 mol L-1 H2SO4 solution at 298 K. Figure S4. Stability of the graphene/Au@Pt0.64Ag0.36 NRs electrocatalyst over 200 cycles of methanol electrooxidation.

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Feng et al. Nanoscale Research Letters 2011 6:551   doi:10.1186/1556-276X-6-551