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Engineering Ti Atomic Diffusion to Enable Sintering-Resistant Pt-Cu-Ti Intermetallics for Enhanced Oxygen Reduction
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DOI：10.1016/j.apcatb.2026.126914.png)
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Abstract
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• ALD-derived TiOx shell suppresses L11-PtCuTi sintering during 750°C ordering. • L1₁-PtCuTi/C shows ~9-fold higher mass activity (1.193 A mg-1Pt) than Pt/C. • Ti atomic diffusion engineering enable L11-PtCuTi with 1.4% activity loss after 30k cycles. • Enhanced Electron-rich Pt from Ti doping optimizes oxygen intermediate binding for ORR. • Robust H2-air fuel cell performance achieved via PtCuTi intermetallics.
Keywords:
TiOx shell
L1₁-PtCuTi
oxygen reduction reaction
atomic diffusion
intermetallics
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