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Title: Treelike two-level PdₓAgᵧ nanocrystals tailored for bifunctional fuel cell electrocatalysis
Authors: Jiang, Xian
Xiong, Yuexin
Wang, Yufei
Wang, Jiaxin
Li, Naixu
Zhou, Jiancheng
Fu, Gengtao
Sun, Dongmei
Tang, Yawen
Keywords: Engineering::Chemical engineering
Issue Date: 2019
Source: Jiang, X., Xiong, Y., Wang, Y., Wang, J., Li, N., Zhou, J., Fu, G., Sun, D. & Tang, Y. (2019). Treelike two-level PdₓAgᵧ nanocrystals tailored for bifunctional fuel cell electrocatalysis. Journal of Materials Chemistry A, 7(10), 5248-5257.
Journal: Journal of Materials Chemistry A
Abstract: Pd-based alloy catalysts have been extensively investigated as the anodic and cathodic catalysts of direct formic acid fuel cells (DFAFCs) by virtue of their unique synergistic effect, good stability and relatively low cost compared with Pt-based alloy catalysts. Controlling the structure and morphology of nanocatalysts is of great significance to tune and boost their electrocatalytic performance. Herein, we propose a simple, rapid and green approach to fabricate tree-like PdAg nanocrystals with tunable chemical composition (PdₓAgᵧ NTs) via mixing the metal precursors and 1-naphthol, and then aging for a mere 30 min at 60 °C. The obtained PdₓAgᵧ NTs feature a two-level structure of tiny Pd₁Ag₃ alloy nanodendrites and Pd₁Ag₂ alloy nanobranches with abundant active sites and enhanced structural stability. The formation mechanism of PdₓAgᵧ NTs has been investigated well via a series of control experiments, which is just like the germination and growth of a tree. To the best of our knowledge, treelike two-level PdₓAgᵧ nanostructures have never been reported before. Electrochemical measurements demonstrate that the Pd₃Ag₁ NTs outperform commercial Pd black and other compositional Pd₁Ag₁ and Pd₁Ag₃ NTs in the aspects of bifunctional activity and stability towards the anodic formic acid oxidation and cathodic oxygen reduction of the DFAFCs.
ISSN: 2050-7488
DOI: 10.1039/c8ta11538a
Rights: © 2019 The Royal Society of Chemistry. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

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