SCR catalytic converter having improved hydrocarbon resistance

A catalyst for the selective catalytic reduction of nitrogen oxides with ammonia in exhaust gases comprising hydrocarbons, comprising:

• a support body;
• a first catalytically active coating which has been applied directly to the support body and comprises a zeolite exchanged with one or more transition metals and/or a zeolite-like compound exchanged with one or more transition metals, and
• a second coating which covers the first coating on the exhaust gas side and is configured so as to prevent the contact of hydrocarbons having at least three carbon atoms present in the exhaust gas with the first coating beneath, without blocking the passage of nitrogen oxides and ammonia to the first coating, and comprises
• one or more small-pore zeolites and/or small-pore zeolite-like compounds selected from the group consisting of SAPO-34, CHA, FER, ERI, OFF, ALPO-34 and mixtures thereof or
• one or more oxides selected from the group consisting of silicon dioxide, germanium dioxide, aluminum oxide, titanium dioxide, tin oxide, cerium oxide, zirconium dioxide and mixed oxides thereof.