From Molecular Nickel Complex to Nanoparticles in N₂O Catalytic Electro-Deoxygenation

<jats:p>Selective electrochemical reduction of nitrous oxide to dinitrogen is catalyzed using a nickel(II) bipyridine complex. The system evolves from a homogeneous catalysis regime toward a heterogeneous process. Ni(OH)2 nanoparticulate deposits, generated from the catalyst decomposition, are identified in post-electrolysis characterizations, suggesting the role of this phase in catalytic activity.</jats:p>