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Title: Flexible Au micro-array electrode with atomic-scale Au thin film for enhanced ethanol oxidation reaction
Authors: Cao, Xun
Peng, Dongdong
Wu, Cao
He, Yongmin
Li, Chaojiang
Zhang, Bowei
Han, Changcun
Wu, Junsheng
Liu, Zheng
Huang, Yizhong
Keywords: Engineering::Materials
Issue Date: 2021
Source: Cao, X., Peng, D., Wu, C., He, Y., Li, C., Zhang, B., Han, C., Wu, J., Liu, Z. & Huang, Y. (2021). Flexible Au micro-array electrode with atomic-scale Au thin film for enhanced ethanol oxidation reaction. Nano Research, 14(1), 311-319.
Project: M4011528
Journal: Nano Research
Abstract: The catalysis of Au thin film could be improved by fabrication of array structures in large area. In this work, nanoimprint lithography has been developed to fabricate flexible Au micro-array (MA) electrodes with ∼ 100% coverage. Advanced electron microscopy characterisations have directly visualised the atomic-scale three-dimensional (3D) nanostructures with a maximum depth of 6 atomic layers. In-situ observation unveils the crystal growth in the form of twinning. High double layer capacitance brings about large number of active sites on the Au thin film and has a logarithmic relationship with mesh grade. Electrochemistry testing shows that the Au MAs perform much better ethanol oxidation reaction than the planar sample; MAs with higher mesh grade have a greater active site utilisation ratio (ASUR), which is important to build electrochemical double layer for efficient charge transfer. Further improvement on ASUR is expected for greater electrocatalytic performance and potential application in direct ethanol fuel cell.[Figure not available: see fulltext.].
ISSN: 1998-0124
DOI: 10.1007/s12274-020-3090-4
Rights: © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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