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Synthesis of ultrathin platinum nanoplates for enhanced oxygen reduction activity

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Abstract

Ultrathin Pt nanostructures exposing controlled crystal facets are highly desirable for their superior activity and cost-effectiveness in the electrocatalytic oxygen reduction reaction (ORR), and they are conventionally synthesized by epitaxial growth of Pt on a limited range of templates, such as Pd nanocrystals, resulting in a high cost and less structural diversity of the ultrathin Pt nanostructures. To solve this problem, we demonstrate that ultrathin Pt nanostructures can be synthesized by templating conveniently available Ag nanocrystals without involving galvanic replacement, which enables a much-reduced cost and controllable new morphologies, such as ultrathin Pt nanoplates that expose the {111} facets. The resulting ultrathin Pt nanoplates are ∼1–2 nm in thickness, which show an ∼22-fold increase in specific activity (5.3 mA cm−2), an ∼9.5-fold increase in mass activity (1.62 A mg−1) and significantly enhanced catalytic stability in the ORR, compared with the commercial Pt/C catalyst. We believe this strategy opens a door to a highly extendable family of ultrathin noble metal nanostructures, thus promising excellent activity and stability in a broad range of catalytic applications.

Graphical abstract: Synthesis of ultrathin platinum nanoplates for enhanced oxygen reduction activity

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Publication details

The article was received on 08 Jul 2017, accepted on 27 Oct 2017 and first published on 30 Oct 2017


Article type: Edge Article
DOI: 10.1039/C7SC02997G
Citation: Chem. Sci., 2018, Advance Article
  • Open access: Creative Commons BY license
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    Synthesis of ultrathin platinum nanoplates for enhanced oxygen reduction activity

    H. Liu, P. Zhong, K. Liu, L. Han, H. Zheng, Y. Yin and C. Gao, Chem. Sci., 2018, Advance Article , DOI: 10.1039/C7SC02997G

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