A　model　is　established　for　understanding　the　temperature　change　of　an　alternate　hot　and　cold　micro-band　graphite　electrode.　It　consists　of　two　symmetrically　placed　thermoelectric　coolers　with　an　embedded　graphite　sheet　as　interlayer.　By　measuring　the　open　circuit　behaviors　of　a　standard　redox　couple,　the　electrode　surface　temperature　can　be　detected.　And　the　electrode　surface　temperature　can　be　regulated　from　40　degrees　C　to　-10　degrees　C　in　aqueous　solution　without　freezing.　The　model　is　described　as　Qh　=　gamma　h　Delta　T,　Qc　=　gamma(c)　Delta　T,　where　the　temperature　change　(Delta　T)　of　electrode　surface　is　assumed　to　be　proportional　to　power　of　heating　(Q(h))　or　cooling　(Q(c)).　In　addition,　the　diffusion　activation　energy　of　ferricyanide　ion　is　firstly　achieved　by　extending　the　temperature　range　from　above　zero　degree　down　to　the　supercooled　temperature　(-10　degrees　C)　with　this　specially　designed　electrode.　Diffusion　coefficient　of　ferricyanide　ion　is　ca.　0.22　x　10(-5)　cm(-2)　s(-1)　at　-10　degrees　C,　and　activation　energy　is　23.2　kJ　mol(-1).　The　experimental　data　are　consistent　with　data　obtained　by　Stokes-Einstein　equation　for　the　determination　of　diffusion　coefficient　and　activation　energy.　(C)　2016　Elsevier　B.V.　All　rights　reserved.