Mechanistic analysis of the dissociative reduction of nitrogen to ammonia by ZnMn2O4 catalyst derived from spent batteries

Electrochemical dinitrogen to ammonia reduction at a nickel(ii) site: an easy access to an air-stable catalyst

“…Hence, in a N 2 environment, the current remains less than that in an Ar atmosphere until the onset of the NRR at ∼−2.2 V. At this potential, the total current embodies contributions from both the HER and the NRR, especially when potentials are sufficiently negative to induce the HER. 63…”

“…Hence, in a N 2 environment, the current remains less than that in an Ar atmosphere until the onset of the NRR at ∼−2.2 V. At this potential, the total current embodies contributions from both the HER and the NRR, especially when potentials are sufficiently negative to induce the HER. 63 The second peak discerned at approximately −2.2 V in the Ar ambience is subdued under N 2 , accompanied by a minor potential shi to −2.0 V. Intriguingly, this peak is exclusive to the complex. It remains absent in the CVs of the ligand and only supporting electrolyte, indicating its probable association with Ni(II)/Ni(I) reduction.…”

A simple hydrothermal synthesis of an oxygen vacancy-rich MnMoO4 rod-like material and its highly efficient electrocatalytic nitrogen reduction

“…34–39 For example, Zhang et al 40 reported porous CoMoO 4 as an NRR electrocatalyst with an NH 3 yield of up to 79.87 μmol h −1 g cat −1 at −0.10 V vs. RHE in neutral media, with an FE of 22.76%, showing excellent catalytic performance. In addition, recently studied bimetallic oxides such as FeMoO 4 , 41 NiMnO 3 , 42 Ni 2 GeO 4 43 and ZnMn 2 O 4 44 have greatly improved NRR performance compared to their monometallic oxides. Inspired by the above cases, the special Mn–Mo bimetallic electrocatalyst designed for the NRR by combining Mn and Mo is worth exploring, with increased active sites through the mutual synergy between Mn and Mo atoms.…”