3 years ago

Vertex-Reinforced PtCuCo Ternary Nanoframes as Efficient and Stable Electrocatalysts for the Oxygen Reduction Reaction and the Methanol Oxidation Reaction

Vertex-Reinforced PtCuCo Ternary Nanoframes as Efficient and Stable Electrocatalysts for the Oxygen Reduction Reaction and the Methanol Oxidation Reaction
Taehyun Kwon, Kwangyeol Lee, Jongsik Park, Minki Jun, Hionsuck Baik, Sang Hoon Joo, Ho Young Kim, Aram Oh
Noble metal binary alloy nanoframes have emerged as a new class of fuel cell electrocatalysts because of their intrinsic high catalytic surface area and accompanied high catalytic activity. However, their inferior structural and compositional stability during catalysis pose as formidable huddles to their practical applications. Herein, it is reported that introduction of an additional component to the binary catalytic system may serve as a simple and effective means of enhancing the structural and compositional stability of nanoframe-based electrocatalysts. It is demonstrated that in situ doping of Co to the PtCu alloy nanoframe yields a ternary PtCuCo rhombic dodecahedral nanoframe (Co-PtCu RNF) with a reinforced vertex structure. Co-PtCu RNF exhibits superior electrocatalytic activity and durability for the oxygen reduction reaction to those of PtCu rhombic dodecahedral nanoframe (PtCu RNF) and Pt/C catalysts, due to its ternary composition and vertex-strengthened frame structure. Furthermore, Co-PtCu RNF shows enhanced activity for the methanol oxidation reaction as compared to PtCu RNF and Pt/C. Novel vertex-reinforced ternary alloy nanoframes with Pt, Cu, and Co exhibit excellent electrocatalytic activity and stability toward the oxygen reduction and the methanol oxidation under acidic condition compared to binary PtCu nanoframes.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adfm.201706440

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