过电势与电催化剂 Mn Oxide oER: Ir/C-20wt 6 Ru/-.% EH (1.23 0.20 EⅣvs.RHE E/(RHE) Acid Base Precious Non-precious Precious Non-precious metals metals metals metals High TOF Medium TOF Medium-High TOF Medium TOF evolution catalysts Pt metal sulfides Pt metal alloys, metal phosphides e.g. NiMo Low TOF Low TOF LOw TOF evolution No known catalysts IrO, RuO, candidates RuO Ni-Fe-Co-0. and other oxide alloys7 过电势与电催化剂