%0 Journal Article %T Direct Formation of 2D-MnOx under Conditions of Water Oxidation Catalysis %J - %D 2018 %R https://doi.org/10.1021/acsanm.8b00095 %X We describe the synthesis and characterization of a novel 2D-MnOx material using a combination of HR-TEM, XAS, XRD, and reactivity measurements. The ease with which the 2D material can be made and the conditions under which it can be made implies that water oxidation catalysts previously described as ¡°birnessite-like¡± (3D) may be better thought of as 2D materials with very limited layer stacking. The distinction between the materials as being ¡°birnessite-like¡± and ¡°2D¡± is important because it impacts on our understanding of the function of these materials in the environment and as catalysts. The 2D-MnOx material is noted to be a substantially stronger chemical oxidant than previously noted for other birnessite-like manganese oxides. The material is shown to both ¡°directly¡± and ¡°catalytically¡± oxidize water in the presence of Ce4+, and to directly oxidize H2O2 in the absence of any other oxidant %U https://pubs.acs.org/doi/10.1021/acsanm.8b00095