Open AccessElectrochemical Reduction of Nitric Oxide with 1.7% Solar‐to‐Ammonia Efficiency Over Nanostructured Core‐Shell Catalyst at Low Overpotentials
Author(s) -
Sethuram Markandaraj Sridhar,
Muthusamy Tamilselvan,
Shanmugam Sangaraju
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202201410
Subject(s) - electrolysis , materials science , catalysis , faraday efficiency , electrochemistry , anode , nanoparticle , cathode , chemical engineering , ammonia production , inorganic chemistry , electrocatalyst , oxygen evolution , oxide , dissolution , electrode , nanotechnology , chemistry , electrolyte , metallurgy , biochemistry , engineering
Transition metals have been recognized as excellent and efficient catalysts for the electrochemical nitric oxide reduction reaction (NORR) to value‐added chemicals. In this work, a class of core–shell electrocatalysts that utilize nickel nanoparticles in the core and nitrogen‐doped porous carbon architecture in the shell (Ni@NC) for the efficient electroreduction of NO to ammonia (NH 3 ) is reported. In Ni@NC, the NC prevents the dissolution of Ni nanoparticles and ensures the long‐term stability of the catalyst. The Ni nanoparticles involve in the catalytic reduction of NO to NH 3 during electrolysis. As a result, the Ni@NC achieves a faradaic efficiency (FE) of 72.3% at 0.16 V RHE . The full‐cell electrolyzer is constructed by coupling Ni@NC as cathode for NORR and RuO 2 as an anode for oxygen evolution reaction (OER), which delivers a stable performance over 20 cycles at 1.5 V. While integrating this setup with a PV‐electrolyzer cell, and it demonstrates an appreciable FE of >50%. Thus, the results exemplify that the core–shell catalyst based electrolyzer is a promising approach for the stable NO to NH 3 electroconversion.