25℃時(shí),用Pt作電極電解a(H+)=1的H2SO4溶液,當(dāng)i=52×10-4A·cm-2時(shí),=0,=0.487V.已知φ0(O2/H2O)=1.229V,那么分解電壓是:()
A.0.742V B.1.315V C.1.216V D.1.716V