FRAMELESS HEXAHEDRON AG-PT BITMETALLIC NANOSTRUCURE FOR ELECTROCHEMICALLY CATALYZING OXYGEN REDUCTION: SYNERGISTIC PLASMONIC EFFECTS TO ALTER REACTION TOWARD 4-ELECTRON PATHWAY

摘要

The AgPt-30 sample could achieve a relatively high enhancernratio of about 4% in limiting current density and the bestrnimprovement ratio of approximately 12% under light excitation.rnAlso, the change of white line intensity of Pt L_3-edge in AgPt-30rnproves hot electron injection from Ag to Pt by aid of LSPR excitationrnand permitted the hot electron successfully alter oxygen reductionrnreaction much toward 4-electron. These findings might be attributedrnto a fact that the induced hot electrons were pumped into the antibondingrnorbital of oxygen and further weaken the binding of oxygen,rnand thereby the oxygen reduction could be significantly alteredrntoward 4-electron path.