An Interfacially Alloyed Pt boolean AND Ag Cathode Catalyst for the Electrochemical Reduction of Oxygen

作者：Feng Yuanyuan^*; Ma Junhong; Zhang Guirong; Zhao Dan; Xu Boqing

来源：Chinese Journal of Catalysis, 2009, 30(8): 776-779.

• nanostructure
• interfacial alloy
• cathode catalyst
• platinum
• silver
• oxygen reduction reaction

An interfacially alloyed Pt-on-Ag natiostructure (Pt(0.5)(boolean AND)Ag-B/C) was loaded on Vulcan XC-72 carbon to make a cathode Pt(0.5)(boolean AND)Ag-B/C catalyst for the oxygen reduction reaction (ORR). The electrocatalytic performance Of this Pt(0.5)(boolean AND)Ag-B/C catalyst was measured by reference to its unalloyed counterpart Pt(0.5)(boolean AND)Ag-A/C and E-TEK Pt/C catalysts. The intrinsic activity of Pt in the Pt(0.5)(boolean AND)Ag-B/C catalyst was identified to be twice that in the E-TEK Pt/C catalyst although the half-wave potentials (E(1/2)) of the ORR curves over both catalysts were the same. Compared with the unalloyed Pt(0.5)(boolean AND)Ag-A/C catalyst, the alloying at the Pt/Ag interface in the Pt(0.5)(boolean AND)Ag-B/C catalyst gave a more positive E(1/2) and also a significantly higher mass-specific activity of Pt for ORR.

• 出版日期2009-8
• 单位清华大学