首页|Ultrathin ternary PtNiGa nanowires for enhanced oxygen reduction reaction
Ultrathin ternary PtNiGa nanowires for enhanced oxygen reduction reaction
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Achieving high activity and durability for the oxygen reduction reaction(ORR)with an ultra-low amount of platinum is significant to promote the widespread application of proton exchange membrane fuel cells(PEMFCs).Here we report a new ultrathin(～1 nm)ternary PtNiGa alloy nanowires(PtNiGa NWs)elec-trocatalyst,in which the presence of gallium(Ga)enhances the oxidation resistance of platinum(Pt)and nickel(Ni)and suppresses the dissolution of Ni.The mass and specific activities of PtNiGa NWs are about 11.2 and 7.6 times higher than those of commercial Pt/C catalysts for ORR.Moreover,the mass activity of PtNiGa/C NWs nanocatalyst decreased only by 12.8％and largely retained its electrochemical surface area(ECSA)after 10,000 potential cycles,compared with 38％loss of ECSA for commercial Pt/C catalyst.There-fore,this work provides a general guideline for preparing ternary alloy electrocatalysts and enhancing the activity and stability of the cathode ORR reaction of PEMFCs.
Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 610054,China
State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,School of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China
National Youth Topnotch Talent Support Program of China四川省科技计划Foundation of State Key Laboratory of Highefficiency Utilization of Coal and Green Chemical Engineering
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