Photocatalytic and electrochemical properties of single‐ and multi‐layer sub‐stoichiometric titanium oxide coatings prepared by atmospheric plasma spraying /Pavel CTIBOR a,* , Ramachandran Chidambaram SESHADRI b , Jiri HENYCH c , Vaclav NEHASIL d , Zdenek PALA a , Jiri KOTLAN - CTIBOR,Pavel