Abstract
A novel boron-doped PdAg alloy anchored on reduced graphene oxide (rGO) was synthesized via a facile aqueous chemical reduction method using NaBH4 as the reducing agent. The characterization results confirm the formation of ultrafine PdAgB alloy nanoparticles that are uniformly dispersed on the surface of rGO. The as-prepared PdAgB/rGO catalysts show composition-dependent catalytic activity for the hydrogen generation from formic acid/sodium formate aqueous solution, with Pd0.90Ag0.10B/rGO exhibiting the highest activity at 298 K. Compared to Pd0.90Ag0.10/rGO prepared by using N2H4·H2O as the reductant, Pd0.90Ag0.10B/rGO displays higher activity towards dehydrogenation of formic acid irrespective of its relatively larger particle size, suggesting the significant promotion of B to the catalytic performance. The superior performance of Pd0.90Ag0.10B/rGO could be attributed to the combination of engineered alloy nanostructure and electronic modification effect of boron species.
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