Nitrous oxide decomposition active site on Ni–MgO catalysts characterized by X-ray absorption fine structure spectroscopy
Abstract
A contracted Ni2+ coordination site distorted in the direction of Ni⋯Mg and Ni⋯Ni was found to be responsible for catalytic N2O decomposition when Ni2+ is diluted in a MgO matrix (Ni2+/Mg2+ atomic ratio ≈ 1.0) based on a local structure study by nickel K-edge X-ray absorption fine structure spectroscopy.