We　have　constructed　a　novel　electrochemiluminescence　(ECL)　platform　by　functionalizing　a　poly(amidoamine)　dendrimer　(PAAD)　with　titanate　nanotubes　(TiNTs).　The　PAAD　has　an　open　spherical　structure　that　possesses　a　high　density　of　active　groups　and　thus　favors　mass　transport,　while　the　TiNTs　possess　excellent　electronic　conductivity　and　thus　can　promote　electron　transfer　on　the　surface　of　a　glassy　carbon　electrode　(GCE).　A　study　on　the　intensity　and　stability　of　the　ECL　of　luminol　on　the　modified　GCE　revealed　a　substantial　improvement　compared　to　that　of　a　bare　GCE.　The　effects　of　the　concentration　of　TiNTs,　the　pH　value　of　the　solution,　and　of　electrochemical　parameters　on　the　intensity　of　the　ECL　of　luminol　were　studied　and　resulted　in　a　sensitive　ECL　sensor　for　hydrogen　peroxide　(H2O2)　that　works　in　the　concentration　range　of　1　nM　to　0.9　mu　M.　The　scavenging　effect　of　superoxide　dismutase　(SOD)　on　the　H2O2　electrode　ECL　was　then　exploited　to　design　a　biosensor　for　the　determination　of　SOD　in　concentrations　between　50　and　500　nM.