Supporting Information
Towards an active and stable catalyst for oxygen
evolution in acidic media: Ti-stabilised MnO2
Rasmus Frydendal, a Elisa A. Paoli, a Ib Chorkendorff,a Jan Rossmeisl,b,c,* Ifan E.L. Stephens a,*
a Center for Individual Nanoparticle Functionality, Department of Physics, Building 312, Technical University of
Denmark, DK-2800 Kgs. Lyngby, Denmark
b Center for Atomic-scale Materials Design, Department of Physics, Building 307, Technical University of
Denmark, DK-2800 Kgs. Lyngby, Denmark
c Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, København Ø, Denmark
Glancing Angle X-ray Diffraction of MnOx catalyst
X-ray diffraction was performed on a PANalytical X’PERT Pro equipment, using the Cukα line of 1.54 Å
wavelength. To maximize the surface to bulk signal we used the glancing angle mode at 0.5 ⁰ which still did not
result in any peaks coming from MnO2 or other crystalline Mn oxide phases.
Figure S1. X-ray diffraction results for the MnO2 film prepared by reactive sputter deposition at 200 C in 5
mTorr Ar:O2, ratio 5:1. No peaks are coming from the films indicating an amorphous phase.