Hydrogen production by ethanol steam reforming over Ni/SBA-15 mesoporous catalysts: Effect of Au addition

• Au was incorporated into Ni/SBA-15 catalyst to improve the performance in SRE.
• Au promoter enhanced the dispersion of Ni on SBA-15 mesoporous support.
• Au promoter is favor of the formation of smaller nickel particles.
• Au promoter strengthened the interaction between the SBA-15 support and NiO.

A series of Ni/SBA-15 and Ni-Au/SBA-15 mesoporous catalysts were synthesized by incipient wetness impregnation and tested in ethanol steam reforming for hydrogen production. ICP-OES, N2 adsorption–desorption, XRD, H2-TPR, TEM and TG-DTG were used to characterize these catalysts in detail. It was found that the incorporation of Au into Ni/SBA-15 catalysts not only improved the dispersion of the NiO phase to form the smaller nickel oxide particle, but also strengthened the interaction between the SBA-15 support and NiO phase, thus efficiently reducing the coke deposition on active sites. Due to these promoting effects, the Au promoted Ni/SBA-15 catalyst showed a high activity and excellent long-term stability for ethanol steam reforming.

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