ELECTRODE-CATALYST MANUFACTURING SYSTEM AND MANUFACTURING METHOD

Provided are an electrode catalyst production system and production method capable of omitting the operation for an operator to scratch off an electrode catalyst precursor, and shortening a washing time of the electrode catalyst precursor. The invention is configured as follows. An electrode catalyst production system 10 has an electrode catalyst precursor production device 12, a washing device 13 and a drying device 14. The washing device 13 includes executors for executing a plate closing step S21 and an injection step S22 in the beginning, and then executing a normal washing step S23 and a reverse washing step S24 before executing a plate opening step S25 and a cake peeling step S26. The normal washing step S23 is a step for supplying a washing water 43 from a stock liquid supply tube 114 to a filter chamber 112, allowing the washing water 43 to pass through an electrode catalyst precursor-containing cake 40, and then discharging the washing water 43 from filtrate discharge outlets 115, 115'. The reverse washing step S24 is a step for supplying the washing water 43 from the filtrate discharge outlet(s) 115 to the filter chamber 112, allowing the washing water 43 to pass through the electrode catalyst precursor-containing cake 40, and then discharging the washing water 43 from the filtrate discharge outlet(s) 115' which are different from the filtrate discharge outlet(s) 115 from which the washing water 43 is supplied. The thickness of the electrode catalyst precursor-containing cake at the time of the injection step S22 is adjusted to that of a range that has been previously and experimentally determined.