Ultrafine Pt Nanoparticle Decorated NiRu-BDC Nanosheets as Bifunctional Electrocatalysts for Alkaline Hydrogen Evolution and Methanol Oxidation

Abstract

To develop highly efficient low-Pt electrocatalysts for methanol oxidation, Pt@NiRu1-BDC/NF was constructed by loading ultrafine Pt nanoparticles onto Ru-modified Ni-BDC/NF metal-organic framework nanosheets. Pt nanoparticles were uniformly dispersed on the nanosheet surface with a low Pt loading of about 0.83 wt%. Benefiting from Ru-induced electronic modulation and the synergistic effect of the two-dimensional nanosheet structure, Pt@NiRu1-BDC/NF exhibited excellent catalytic performance toward the methanol oxidation reaction in alkaline media. The mass activity reached 9.84 A mgPt -1 , which is 15 times higher than that of commercial Pt/C, together with stronger CO poisoning tolerance. In situ surface-enhanced Raman spectroscopy further revealed the correlation between the superior performance and the evolution of reaction intermediates. This work provides a new strategy for designing MOF-based low-Pt catalysts for efficient methanol oxidation.