NiPt Nanocatalysts Supported on Boron and Nitrogen Co-Doped Graphene for Superior Hydrazine Dehydrogenation and Methanol Oxidation

Boron and nitrogen co-doped graphene (BNG) with negligible covalent boron-nitride (BN) bonding, and high boron and pyridinic nitrogen contents has been synthesized by a two-step method using boron-carbon-nitride (BCN) as the boron and nitrogen sources. The use of the BCN precursor is the key for preparing BNG, while annealing reduced graphene oxide, urea, and boric acid in a one-step method results in separated domains of larger amounts of covalent BN in the graphene networks (s-BNG). The resulting BNGs are further used to anchor NiPt nanoparticles (NPs) with good dispersion. Consequently, Ni3Pt7/BNG-1000 exhibits the highest catalytic activity toward hydrazine dehydrogenation at room temperature, with the turnover frequency of 199.4h(-1). Furthermore, as evidence of its multifunctionality, Ni3Pt7/BNG-1000 is further employed for electrocatalytic methanol oxidation.