In-situ proton filter catalysts for electrochemical ammonia production

Abstract

An in-situ proton filter catalyst for ammonia production includes a covalent organic framework (COF) having a triazine and pyridine moiety, and a metal embedded into the COF. The porous COF includes two dimensional (2D) layers. During formation of the catalyst, the metal can partially delaminate the 2D layers and the metal precursor is reduced and can form nanoclusters. The metal nanoclusters are located between the 2D layers and in pores of the 2D layers. In some examples, the metal can be ruthenium. A concentration of the metal in the in-situ proton filter catalyst can be between about 1 and about 5 ppm, in some examples. A ratio (by weight) of the metal precursor to COF can be about 3:1, in some examples. The in-situ proton filter catalyst can be synthesized under ambient conditions and is thermally stable up to about 400° C. Moreover, the in-situ proton filter catalyst exhibits a high NH3 yield rate and high F.E.

Dependencies are inferred from the claim text.