“…Mn 2 SnO 4 is insoluble and has abundant electroactive sites for entrapping electrons and accelerating chemical reactions, so it has been extensively studied in catalysis, energy storage (secondary batteries, supercapacitors), electrochemical sensing, and so on. 18–21 However, the ECL response of Mn 2 SnO 4 has not been explored to date, although other metal stannates, such as Zn 2 SnO 4 22 and Ce 2 Sn 2 O 7 , 23 have been successfully employed in ECL immunosensors.…”