In-situ loading synthesis of graphene supported PtCu nanocube and its high activity and stability for methanol oxidation reaction.
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| Title: | In-situ loading synthesis of graphene supported PtCu nanocube and its high activity and stability for methanol oxidation reaction. |
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| Authors: | Yang, Yi1,2 (AUTHOR), Guo, Yi-Fei1 (AUTHOR), Fu, Ce1 (AUTHOR), Zhang, Rong-Hua1 (AUTHOR) rhzhang@ctgu.edu.cn, Zhan, Wei1 (AUTHOR), Wang, Pan1 (AUTHOR), Zhang, Xin1 (AUTHOR), Wang, Qi1,3 (AUTHOR) qiwang@ipp.ac.cn, Zhou, Xin-Wen1 (AUTHOR) xwzhou@ctgu.edu.cn |
| Source: | Journal of Colloid & Interface Science. Aug2021, Vol. 595, p107-117. 11p. |
| Subjects: | Oxidation of methanol, Graphene synthesis, Ethylene oxide, Propylene oxide, Catalytic activity, Block copolymers |
| Abstract: | PtCu nanocubes can be loaded perfectly on graphene without morphology change and exhibit enhanced electrocatalytic activity and stability towards MOR. [Display omitted] A perfect PtCu nanocube with partial hollow structure was prepared by hydrothermal reaction and its electrocatalytic methanol oxidation reaction (MOR) was studied. The appropriate concentration of shape-control additives KI and triblock pluronic copolymers, poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO 19 -PPO 69 -PEO 19) (P123) play crucial roles in the final product morphology. The PtCu nanocubes can be perfectly in situ immobilizedonto graphene under the action of P123 while the structure and cubic morphologyremain unchanged. The electrochemical tests suggest that the obtained PtCu nanocube (PtCu-NCb) exhibits better MOR activity and stability than PtCu hexagon nanosheet (PtCu-NSt), PtCu nanoellipsoid (PtCu-NEs) and commercial Pt/C in alkaline medium. When in situ immobilized onto graphene, the MOR catalytic activity and stability of PtCu cubes are further improved. The markedly enhanced electrocatalytic activity and durability maybe attributed to the special cubic morphology with partial hollow structure enclosed by highly efficient facet and the probably the synergistic effect of PtCu and intermediate state CuI decorated on the surface and graphene. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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