Abstract: The invention relates to a distributor plate (7) for an electrochemical cell (1), the distributor plate (7) having a structure comprising connecting portions (12) with surfaces (13), and main ducts (11) having floor surfaces (33). The surfaces (13) and optionally on the floor surfaces (33) of the secondary ducts (15) are provided with a pattern (92) and the distributor plate (7) has at least two regions (94) in which the patterns (92) on the surfaces (13) differ from one another. The invention further relates to a method for producing the distributor plate (7), an electrochemical cell (1), and a method for operating an electrochemical cell (1).

Abstract: The present invention relates to a fuel cell stack (10) for an electrochemical reactor (11), comprising: —a first membrane-electrode assembly (12), a first anode plate (21) having ridges (30), between which ridges channels (31) for conducting fuel (32) and coolant (33) are formed, and—a second anode plate (22) having ridges (30), between which ridges channels (31) for conducting fuel (32) and coolant (33) are formed; wherein the first membrane-electrode assembly (12) is disposed between the first anode plate (21) and the second anode plate (22) in a stacking direction (36) of the fuel cell stack (10) and wherein the ridges (30) each have a ridge outer face (35) spaced apart from the channels (31), and wherein ridge outer faces (35) of the first anode plate (21) and of the second anode plate (22) which face each other are disposed one over the other in the stacking direction (36) in pairs, and ridge outer faces (35) of the first anode plate (21) and the second anode plate (22) which face away from each other a