Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/164707
Title: Efficient ternary mn-based spinel oxide with multiple active sites for oxygen evolution reaction discovered via high-throughput screening methods
Authors: Ahmed, Mahmoud Gamal
Tay, Ying Fan
Chi, Xiao
Zhang, Mengyuan
Tan, Joel Ming Rui
Chiam, Sing Yang
Rusydi, Andrivo
Wong, Lydia Helena
Keywords: Engineering::Materials
Issue Date: 2023
Source: Ahmed, M. G., Tay, Y. F., Chi, X., Zhang, M., Tan, J. M. R., Chiam, S. Y., Rusydi, A. & Wong, L. H. (2023). Efficient ternary mn-based spinel oxide with multiple active sites for oxygen evolution reaction discovered via high-throughput screening methods. Small, 19(2), 2204520-. https://dx.doi.org/10.1002/smll.202204520
Project: MOE2019-T2-1-163 
MOE T2EP50120-00081 
2020-T1-001-147 (RG64/20) 
SupportC-380-003-003-001 
Journal: Small 
Abstract: The discovery of more efficient and stable catalysts for oxygen evolution reaction (OER) is vital in improving the efficiency of renewable energy generation devices. Given the large numbers of possible binary and ternary metal oxide OER catalysts, high-throughput methods are necessary to accelerate the rate of discovery. Herein, Mn-based spinel oxide, Fe10 Co40 Mn50 O, is identified for the first time using high-throughput methods demonstrating remarkable catalytic activity (overpotential of 310 mV on fluorine-doped tin oxide (FTO) substrate and 237 mV on Ni foam at 10 mA cm-2 ). Using a combination of soft X-ray absorption spectroscopy and electrochemical measurements, the high catalytic activity is attributed to 1) the formation of multiple active sites in different geometric sites, tetrahedral and octahedral sites; and 2) the formation of active oxyhydroxide phase due to the strong interaction of Co2+ and Fe3+ . Structural and surface characterizations after OER show preservation of Fe10 Co40 Mn50 O surface structure highlighting its durability against irreversible redox damage on the catalytic surface. This work demonstrates the use of a high-throughput approach for the rapid identification of a new catalyst, provides a deeper understanding of catalyst design, and addresses the urgent need for a better and stable catalyst to target greener fuel.
URI: https://hdl.handle.net/10356/164707
ISSN: 1613-6810
DOI: 10.1002/smll.202204520
DOI (Related Dataset): 10.21979/N9/CUJXTP
Schools: School of Materials Science and Engineering 
Organisations: Institute of Materials Research and Engineering, A*STAR 
Singapore-HUJ Alliance for Research and Enterprise (SHARE) 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: © 2022 Wiley-VCH GmbH. All rights reserved. This is the peer reviewed version of the following article: Ahmed, M. G., Tay, Y. F., Chi, X., Zhang, M., Tan, J. M. R., Chiam, S. Y., Rusydi, A. & Wong, L. H. (2023). Efficient ternary mn-based spinel oxide with multiple active sites for oxygen evolution reaction discovered via high-throughput screening methods. Small, 19(2), 2204520-, which has been published in final form at https://doi.org/10.1002/smll.202204520. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles
MSE Journal Articles

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