Insight into Ni active site coordination in nickel-manganese spinels for methanol electrooxidation catalysis.

ABSTRACT: As non-precious catalysts, Ni-based catalysts play a significant role in methanol oxidation for energy conversion technologies. At the same time, the effect of the complicated chemical environment on catalytic efficiency remains unclear. Here, the coordination environment of Ni active sites in spinel nickel-manganese (NiMn₂O₄ and MnNi₂O₄) is investigated as a platform to elucidate the correlation with catalytic performance in methanol electro-oxidation. The occupation of Ni²⁺ ions in these structures modulates the intrinsic activity of Ni active sites in NiMn spinels, resulting in different catalytic mechanisms and intrinsic active site efficiency, although they have similar morphology and structure. The high-symmetry NiO₆ o

SUBMITTER: Guo R 

PROVIDER: S-EPMC12208212 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature