Highly Stable Doped Barium Niobate Based Electrocatalysts for Effective Electrochemical Coupling of Methane to Ethylene

• DOI: 10.1002/admi.202200796
• Publication Date: 2022-08-26T18:35:11Z
• Authors: Luke H. Denoyer; Angelica Benavidez; Fernando H. Garzon; Kannan P. Ramaiyan
• Keywords: Barium; Chemical Stability

Abstract Methane conversion into value‐added products such as olefins and aromatics is gaining increased attention in the wake of new natural gas reserve discoveries. Electrochemical oxidative coupling methane (E‐OCM) provides better product selectivity distribution can be controlled by applied potential well oxide ion flux. Here a catalyst based on Mg Fe codoped barium niobate perovskites reported. The prepared show excellent chemical stability CH 4 ‐rich environments up to 925 °C while showing activation properties from 600 °C. E‐OCM measurements indicate an ethylene production rate 277 µmol cm −2 h −1 with faradaic efficiency 20% at 1 V durable operation for six continuous days. X‐ray photoelectron spectroscopic significant Nb valency reorganization that reason its stability. Nevertheless, surface area significantly lower requires improvements synthesis methodologies improve catalytic activity further. exceptional this perovskite material under exposure high temperatures has importance used and/or support wide variety applications relevant efficient energy storage.