Ternary PtSmCo NPs electrocatalysts with enhanced oxygen reduction reaction
来源期刊：Journal of Rare Earths2020年第12期
论文作者：Qinghua Gong Leping Wang Ni Yang Lin Tian Gang Xie Bing Li
文章页码：1305 - 1311
摘 要：PtSmCo ternary metal nanoparticles（NPs） were synthesized as electrocatalysts for oxygen reduction reaction（ORR）.Firstly,SmCo NPs were prepared by potentiostatic electrodeposition in ionic liquids（ILs）,and the average particle diameter of SmCo NPs corresponds to about 238 nm（-0.65 V）,72 nm（-0.75 V）and 45 nm（-0.85 V）,respectively.Secondly,displacement and reductions of SmCo NPs occur in the K2 PtCl4 and L-ascorbic acid sodium with about 3 nm of Pt NPs which grow on the surface of SmCo NPs to form PtSmCo ternary metal NPs.Studies of cycle voltammetry（CV） and line sweep voltammetry（LSV）indicate that the electrocatalytic property for ORR generates a decreasing order of commercial Pt/C> PtSmCo0.85> PtSmCo0.75> PtSmCo0.65.Accelerated durability testing（ADT） after 10000 cycles shows that PtSmCo0.85 NPs electrocatalyst decreases by-40% in electrochemical active surface areas（ECSA）,the half-wave potential(E1/2) only negatively shifts by 14 mV and decreases by ～13.6% in mass activity（MA）.When compared with JM Pt/C,where it decreases by ～49% in ECSA,E1/2 is negatively shifted by 40 mV and decreased by ～50% in MA.Therefore,PtSmCo0.85 NPs electrocatalyst is more stable than JM Pt/C.
Qinghua Gong1，Leping Wang1，Ni Yang2,3，Lin Tian2,3，Gang Xie2,3，Bing Li1
1. School of Mechanical and Power Engineering,East China University of Science and Technology2. Kunming Metallurgical Research Institute3. State Key Laboratory of Pressure Hydrometallurgical Technology of Associated Nonferrous Metal Resources
摘 要：PtSmCo ternary metal nanoparticles（NPs） were synthesized as electrocatalysts for oxygen reduction reaction（ORR）.Firstly,SmCo NPs were prepared by potentiostatic electrodeposition in ionic liquids（ILs）,and the average particle diameter of SmCo NPs corresponds to about 238 nm（-0.65 V）,72 nm（-0.75 V）and 45 nm（-0.85 V）,respectively.Secondly,displacement and reductions of SmCo NPs occur in the K2 PtCl4 and L-ascorbic acid sodium with about 3 nm of Pt NPs which grow on the surface of SmCo NPs to form PtSmCo ternary metal NPs.Studies of cycle voltammetry（CV） and line sweep voltammetry（LSV）indicate that the electrocatalytic property for ORR generates a decreasing order of commercial Pt/C> PtSmCo0.85> PtSmCo0.75> PtSmCo0.65.Accelerated durability testing（ADT） after 10000 cycles shows that PtSmCo0.85 NPs electrocatalyst decreases by-40% in electrochemical active surface areas（ECSA）,the half-wave potential(E1/2) only negatively shifts by 14 mV and decreases by ～13.6% in mass activity（MA）.When compared with JM Pt/C,where it decreases by ～49% in ECSA,E1/2 is negatively shifted by 40 mV and decreased by ～50% in MA.Therefore,PtSmCo0.85 NPs electrocatalyst is more stable than JM Pt/C.
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