Uniform PtRu 0.6 Nanoparticles Supported on Nitrogen-Doped Carbon Obtained from ZIF-8/GO Hybrid with Remarkable Alkaline Hydrogen Oxidation Activity

Fabrication of a highly active and robust electrocatalyst for alkaline hydrogen oxidation reaction (HOR) is important for hydroxide exchange membrane fuel cells. Here, we report an alkaline HOR electrocatalyst with PtRu nanoparticles uniformly dispersed on porous nitrogen-doped carbon via an ethylene glycol reduction method, where porous nitrogen-doped support (NC-ZG) is prepared by the low-temperature pyrolysis of an in situ-grown ZIF-8/graphene oxide nanocomposite. The obtained PtRu 0.6 /NC-ZG electrocatalyst shows a mass specific exchange current density ( j 0,m ) of 1102 A g PtRu −1 , superior to reference PtRu 0.6 /NC-Z with only ZIF-8 pyrolyzed as carbon support (312 A g PtRu −1 ) and the commercial Pt/C (224 A g PtRu −1 ). The splendid property contributes to the rich micro-mesopores structure, large specific surface area, high conductivity, and electronic effects between Pt and Ru for the optimization of OH ads and H ads binding energy. Moreover, PtRu 0.6 /NC-ZG also displays good stability with 66.4% of j 0,m remaining after the accelerated durability tests, outperforming commercial Pt/C (45.9%). This work demonstrates that engineering support structures and active components can obtain efficient HOR electrocatalysts.