首页|Tin-mediated carbon-confined Pt3Co ordered intermetallic nanoparticles as highly efficient and durable oxygen reduction electrocatalysts for rechargeable zinc-air batteries
Tin-mediated carbon-confined Pt3Co ordered intermetallic nanoparticles as highly efficient and durable oxygen reduction electrocatalysts for rechargeable zinc-air batteries
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The development of electrocatalysts for the oxygen reduction reaction(ORR)that bears high selectivity,exceptional activity,and long-term stability is crucial for advancing various green energy technologies.Intermetallics composed of platinum and transition metals are considered to be promising candidates for this purpose.However,they typically face challenges such as unfavorable intrinsic activity and a propensity for particle aggregation,diminishing their ORR performance.Against this backdrop,we pre-sent our findings on a N-doped carbon confined Pt3Co intermetallic doped with p-block metal tin(Pt3CoxSn1-x/NC).The introduction of Sn induces lattice strain due to its larger atomic size,which leads to the distortion of the Pt3Co lattice structure,while the coupling of carbon polyhedra inhibits the particle aggregation.The optimized Pt3Co0.8Sn0.2/NC catalyst demonstrates an impressive half-wave potential of 0.86 V versus RHE,surpassing both Pt3Co/NC and Pt3Sn/NC catalysts.Moreover,the Pt3Co0.8Sn0.2/NC exhi-bits a mass-specific activity as high as 1.4 A mgpt1,ranking it in the top level among the intermetallics-based ORR electrocatalysts.When further employed as a cathode material in a self-assembled zinc-air battery,it shows stable operation for over 80 h.These results underscore the significant impact of lattice strain engineering through the strategic doping of p-block metal in the carbon-confined Pt3Co intermetal-lic,thereby enhancing the catalytic efficiency for the ORR.
Institute of Functional Nano and Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices,Soochow University,Suzhou 215123,Jiangsu,China
Suzhou Key Laboratory for Nanophotonic and Nanoelectronic Materials and Its Devices,School of Materials Science and Engineering Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China
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