Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/142177
Title: | Morphology controlling of silver by plasma engineering for electrocatalytic carbon dioxide reduction | Authors: | Yu, Qing Guo, Chenxi Ge, Junyu Zhao, Yunxing Liu, Qing Gao, Pingqi Xiao, Jianping Li, Hong |
Keywords: | Engineering::Electrical and electronic engineering | Issue Date: | 2020 | Source: | Yu, Q., Guo, C., Ge, J., Zhao, Y., Liu, Q., Gao, P., . . . Li, H. (2020). Morphology controlling of silver by plasma engineering for electrocatalytic carbon dioxide reduction. Journal of Power Sources, 453, 227846-. doi:10.1016/j.jpowsour.2020.227846 | Journal: | Journal of Power Sources | Abstract: | Morphology is crucial for catalyst performance, particularly in carbon dioxide (CO2) electroreduction because its selectivity over water reduction is very sensitive to catalyst surface morphology. Leveraging plasma engineering, we have developed a facile plasma activation process to control the morphology of silver electrocatalyst for CO2 reduction reaction (CO2RR). By controlling the oxygen plasma conditions, we could tune the silver morphology; and hence optimize the catalytic activity to achieve an unprecedentedly high performance for CO2RR. The optimized morphology, microrod array, exhibits a current density of ~10 mA cm−2 at −0.50 V vs. RHE with significantly increased Faraday efficiencies over a very broad potential range (0.35–0.7 V vs. RHE). Our complementary theoretical study reveals that the significantly enhanced electrocatalytic activity and selectivity at decreased overpotential can be attributed to the stepped/kinked surface and subsurface oxygen, which increase the binding energy of CO intermediates without altering hydrogen binding energy; and thus lower the overpotential for CO2RR and increase the selectivity of CO over hydrogen. Our work provides a cost-effective and scalable technique for making catalysts for energy-efficient conversion of CO2 to CO. | URI: | https://hdl.handle.net/10356/142177 | ISSN: | 0378-7753 | DOI: | 10.1016/j.jpowsour.2020.227846 | Rights: | © 2020 Elsevier B.V. All rights reserved. This paper was published in Journal of Power Sources and is made available with permission of Elsevier B.V. | Fulltext Permission: | embargo_20221231 | Fulltext Availability: | With Fulltext |
Appears in Collections: | MAE Journal Articles |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Morphology controlling of silver by plasma engineering for electrocatalytic carbon dioxide reduction.pdf Until 2022-12-31 | 643.32 kB | Adobe PDF | Under embargo until Dec 31, 2022 |
SCOPUSTM
Citations
2
Updated on Mar 2, 2021
PublonsTM
Citations
2
Updated on Feb 25, 2021
Page view(s)
40
Updated on Mar 3, 2021
Download(s)
5
Updated on Mar 3, 2021
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.