4.8 Article

One-pot synthesis of ultrafine decahedral platinum crystal decorated graphite nanosheets for the electro-oxidation of formic acid

Journal

JOURNAL OF CATALYSIS
Volume 345, Issue -, Pages 70-77

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2016.11.024

Keywords

Platinum decahedral nanocrystals; Graphite nanosheets; Shape-control synthesis; Formic acid oxidation; Facet-dependent activity

Funding

  1. Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen [G1605]
  2. Natural Science Foundation of Guangdong Province, China [2014A030310315]

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Synthesis of five-twined platinum decahedra is currently a great challenge. Reported herein is a solution synthesis of ultrafine decahedral platinum crystals (average size 5.9 nm) mediated by graphite nanosheets together with poly (dimethyl diallyi ammonium chloride). The graphite nanosheets play a critical role in the formation of Pt decahedra. The obtained Pt decahedral crystals provide a valuable platform for the fundamental study of facet-dependent activity of platinum. The hybrid of Pt decahedral crystal decorated graphite nanosheets shows outstanding activity and durability for the oxidation of formic acid. The hybrid possesses a remarkable current density of 4.3 mA cm(-2), which is 2 times that of state-of-the-art Pt/C catalyst. The superior catalytic performance is well correlated with the unique structures of decahedral Pt crystals. The synthesis protocol disclosed in this study would pave a new route to fabricate high-performance electrocatalysts for fuel cells. (C) 2016 Elsevier Inc. All rights reserved.

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