Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 873, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2020.114423
Keywords
N-doped carbon quantum dots; Au-Pd nanoparticles; Core-shell structure; Methanol oxidation
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Funding
- National Natural Science Foundation of China [21165016, 21175108, 21265018]
- Science and Technology Support Projects of Gansu Province [1011GKCA025, 090GKCA036, 1208RJZM289]
- Innovation Capacity Improvement Plan of Northwest Normal University [CX2018Y007]
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A strategy for the synthesis of Au@N-CQDs@Pd three-layer core-shell nanoparticles without the use of any surfactant is proposed in this work. Herein, N-doped carbon quantum dots (N-CQDs) are used as the reducing agent, stabilizing agent, and shape-directing agent. The morphology and structure of the final product were characterized by Transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and X-ray powder diffraction (XRD). The electrocatalytic test indicates the as-synthesized Au@N-CQDs@Pd 20 exhibites excellent activity for methanol oxidation in alkaline media, which is approximately 6 times higher than commercial Pd/C. And its resistance to CO and stability are also greatly improved. This work provides a simple and straightforward approach to prepare bimetallic core-shell electrocatalyst by using CQDs with high catalytic activity for alkaline fuel cells. (C) 2020 Elsevier B.V. All rights reserved.
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