PdP<sub>2</sub> Nanoparticles on Reduced Graphene Oxide: A Catalyst for the Electrocatalytic Reduction of Nitrate to Ammonia
Guohui Wang, Ying Zhang, Kai Chen, Yali Guo, Ke Chu
Abstract
Palladium phosphides are explored as efficient catalysts for the electrocatalytic reduction of nitrate to ammonia (NRA). The explored PdP 2 nanoparticles on reduced graphene oxide exhibit the maximum NH 3 Faradaic efficiency of 98.2% with a corresponding NH 3 yield rate of 7.6 mg h –1 cm –2 at −0.6 V (RHE). Theoretical calculations reveal that a PdP 2 (011) surface can not only effectively activate and hydrogenate NO 3 – via a NOH pathway but also retard H adsorption to inhibit the competitive hydrogen evolution reaction.
Topics & Concepts
ChemistryGrapheneCatalysisAmmoniaInorganic chemistryOxideNanoparticleNitrateAdsorptionYield (engineering)PalladiumElectrochemistryFaraday efficiencyHydrogenChemical engineeringElectrodeOrganic chemistryPhysical chemistryMetallurgyEngineeringMaterials scienceAmmonia Synthesis and Nitrogen ReductionAdvanced Photocatalysis TechniquesNanomaterials for catalytic reactions