Abstract
• Synthesis of high-active PtCu nanoframes for oxygen reduction reaction. • Synergistic interaction of PtCu nanoframes has excellent electrocatalytic performance. • The etched PtCu nanoframes shows high stability in durability tests. Advances in proton exchange membrane fuel cells require Pt-based catalysts with high catalytic activity and stability. However, due to the expensiveness of Pt, scholars are mainly finding ways to improve the catalytic performance and decrease Pt usage. In this paper, the synthesis of high-active PtCu alloy nanoframes is reported. The nanoframes are prepared by the electric displacement reaction between the Cu nanoplate (Cu NP) template and the Pt precursor, and the high-active PtCu alloy nanoframes are obtained by further etching. The synergistic effect of alloy PtCu nanoframes shows excellent electrocatalytic performance for oxygen reduction reactions, with PtCu high-active nanoframes(PtCu HNF) having approximately 1.4 times the mass activity of commercial Pt/C and exhibiting high stability and tolerance in acidic ORR. Due to the increase in the number of surface active sites and the synergistic effect of bimetals, the activity and stability of the catalyst are significantly improved.
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