Novel ultrafine nanoporous Pt (NP-Pt) ribbons were fabricated by dealloying melt-spun Al 85 Pt 15 and Al 85 Pt 8 Ce 7 alloys. The addtion of Ce to Al-Pt alloy changed the phase constituents and distribution of the alloy. During alkali-dealloying, CeOx nanorods formed and were distributed in NP-Pt. Sacrificial nanorods were then selectively removed during acid-dealloying, resulting in the formation of hierarchical NP-Pt ribbons with a ligament scale of approximately 3 nm. The specific surface area of the NP-Pt was 3 times greater than that of the Al 85 Pt 15 alloy without Ce. NP-Pt with a high active surface area had remarkable electro-catalytic performance and stability towards methanol oxidation.
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Zhang et al. (2018) studied this question.
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