Electrocatalyst　arrays　with　various　AuPd　compositions　have　been　deposited　onto　an　indium　tin　oxide　(ITO)　surface　by　an　electrochemical　wet-stamping　(EWETS)　technique.　Micropatterned　high-strength　agarose　containing　different　solutions　of　chloroauric　acid　and　chloropalladic　acid　has　been　used　to　electrodeposit　and　generate　patterns　of　AuPd　nanoparticle　arrays　on　ITO.　The　compositions　of　the　AuPd　catalysts　prepared　by　EWETS　have　been　determined　through　a　combination　of　energy-dispersive　X-ray　analysis　(EDX)　and　X-ray　diffraction　spectroscopy　(XRD).　Field-emission　scanning　electron　microscopy　(FE-SEM)　and　atomic　force　microscopy　(AFM)　have　been　employed　to　characterize　their　morphology.　The　electrochemical　activities　of　the　AuPd　alloys　for　H2O2　and　FcMeOH(+)　reduction　reactions　have　been　investigated　in　both　redox-competition　and　feedback　modes　by　means　of　scanning　electrochemical　microscopy　(SECM).　The　results　obtained　from　SECM　images　were　well　corroborated　by　calculated　heterogeneous　electron　transfer　(HET)　rates　for　the　respective　AuPd　electrodes,　demonstrating　that　the　SECM　was　applicable　for　the　screening　of　multicomponent　alloy　catalysts　and　determining　the　optimal　composition　for　electrocatalytic　reactions.　(C)　2016　Elsevier　B.V.　All　rights　reserved.