Lattice strain and atomic replacement of CoO₆ octahedra in layered sodium cobalt oxide for boosted water oxidation electrocatalysis

Layered alkali metal oxides have been emerged as an alternative group with low-cost and promising electrocatalysts in water oxidation. The distinct layered configuration may offer some interesting possibilities to tune the intrinsic activity by regulating the intralayer edge-shared CoO6 octahedra an...

Full description

Saved in:
Bibliographic Details
Main Authors: Sun, Lan, Dai, Zhengfei, Zhong, Lixiang, Zhao, Yiwei, Cheng, Yan, Chong, Shaokun, Chen, Guanjun, Yan, Chunshuang, Zhang, Xiaoyu, Tan, Huiteng, Zhang, Long, Dinh, Khang Ngoc, Li, Shuzhou, Ma, Fei, Yan, Qingyu
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2022
Subjects:
Online Access:https://hdl.handle.net/10356/154701
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-154701
record_format dspace
spelling sg-ntu-dr.10356-1547012023-07-14T16:03:44Z Lattice strain and atomic replacement of CoO₆ octahedra in layered sodium cobalt oxide for boosted water oxidation electrocatalysis Sun, Lan Dai, Zhengfei Zhong, Lixiang Zhao, Yiwei Cheng, Yan Chong, Shaokun Chen, Guanjun Yan, Chunshuang Zhang, Xiaoyu Tan, Huiteng Zhang, Long Dinh, Khang Ngoc Li, Shuzhou Ma, Fei Yan, Qingyu School of Materials Science and Engineering Engineering::Materials::Energy materials Desodiation Process CoO₆ Octahedra Layered alkali metal oxides have been emerged as an alternative group with low-cost and promising electrocatalysts in water oxidation. The distinct layered configuration may offer some interesting possibilities to tune the intrinsic activity by regulating the intralayer edge-shared CoO6 octahedra and the CoO2 interlayer spacing/strain. In this work, electrochemical desodiation tuning method is explored on intralayer Ag, Cu, Ce-doped Na0.7CoO2 for highly active OER catalysts. It is demonstrated that the ΔGOH* value in the volcano plot is optimized by proper desodiation. Meanwhile, the lattice strain introduced along with the desodiated process modulates the ΔGOH*, according to first principle calculations. It shows that ~0.157% compressive strain in the CoO2 layers and ~1% tensile strain between CoO2 layers are introduced in the desodiated Ag doped Na0.7CoO2. Among these catalysts, the desodiated Ag-Na0.7CoO2 sample exhibits an optimal RuO2-beyond water oxidation (OER) activity with the lowest overpotential of 236 mV@10 mA/cm2, the smallest Tafel slope of 48 mV/dec and the highest mass current density of 227.8 A/g. This work provides an interesting avenues to optimize existing layered materials with inter/intralayer modifications for highly efficient water oxidation electrolysis. Ministry of Education (MOE) National Research Foundation (NRF) Accepted version This work was supported by National Natural Science Foundation of China (Grant No. 51771144 and 51802252), Singapore MOE AcRF Tier 2 Grant (Nos. 2017-T2-2-069 and 2018-T2-01-010), and National Research Foundation of Singapore (NRF) Investigatorship (NRF2016NRF-NRFI001-22), the Natural Science Foundation of Shaanxi Province (Nos. 2019TD-020, 2020JM-032, 2020JQ-386, 2019JLM-30 and 2017JZ015), Outstanding Youth Project of Shaanxi Province (No. 2021JC-06) and Natural Science Foundation of Jiangsu Province (BK20180237). This research used the resources of the HPCC platform in Xi’an Jiaotong University. 2022-01-05T07:53:31Z 2022-01-05T07:53:31Z 2021 Journal Article Sun, L., Dai, Z., Zhong, L., Zhao, Y., Cheng, Y., Chong, S., Chen, G., Yan, C., Zhang, X., Tan, H., Zhang, L., Dinh, K. N., Li, S., Ma, F. & Yan, Q. (2021). Lattice strain and atomic replacement of CoO₆ octahedra in layered sodium cobalt oxide for boosted water oxidation electrocatalysis. Applied Catalysis B: Environmental, 297, 120477-. https://dx.doi.org/10.1016/j.apcatb.2021.120477 0926-3373 https://hdl.handle.net/10356/154701 10.1016/j.apcatb.2021.120477 297 120477 en 2017-T2-2-069 2018-T2-01-010 NRF2016NRF-NRFI001-22 Applied Catalysis B: Environmental © 2021 Elsevier B.V. All rights reserved. This paper was published in Applied Catalysis B: Environmental and is made available with permission of Elsevier B.V. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials::Energy materials
Desodiation Process
CoO₆ Octahedra
spellingShingle Engineering::Materials::Energy materials
Desodiation Process
CoO₆ Octahedra
Sun, Lan
Dai, Zhengfei
Zhong, Lixiang
Zhao, Yiwei
Cheng, Yan
Chong, Shaokun
Chen, Guanjun
Yan, Chunshuang
Zhang, Xiaoyu
Tan, Huiteng
Zhang, Long
Dinh, Khang Ngoc
Li, Shuzhou
Ma, Fei
Yan, Qingyu
Lattice strain and atomic replacement of CoO₆ octahedra in layered sodium cobalt oxide for boosted water oxidation electrocatalysis
description Layered alkali metal oxides have been emerged as an alternative group with low-cost and promising electrocatalysts in water oxidation. The distinct layered configuration may offer some interesting possibilities to tune the intrinsic activity by regulating the intralayer edge-shared CoO6 octahedra and the CoO2 interlayer spacing/strain. In this work, electrochemical desodiation tuning method is explored on intralayer Ag, Cu, Ce-doped Na0.7CoO2 for highly active OER catalysts. It is demonstrated that the ΔGOH* value in the volcano plot is optimized by proper desodiation. Meanwhile, the lattice strain introduced along with the desodiated process modulates the ΔGOH*, according to first principle calculations. It shows that ~0.157% compressive strain in the CoO2 layers and ~1% tensile strain between CoO2 layers are introduced in the desodiated Ag doped Na0.7CoO2. Among these catalysts, the desodiated Ag-Na0.7CoO2 sample exhibits an optimal RuO2-beyond water oxidation (OER) activity with the lowest overpotential of 236 mV@10 mA/cm2, the smallest Tafel slope of 48 mV/dec and the highest mass current density of 227.8 A/g. This work provides an interesting avenues to optimize existing layered materials with inter/intralayer modifications for highly efficient water oxidation electrolysis.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Sun, Lan
Dai, Zhengfei
Zhong, Lixiang
Zhao, Yiwei
Cheng, Yan
Chong, Shaokun
Chen, Guanjun
Yan, Chunshuang
Zhang, Xiaoyu
Tan, Huiteng
Zhang, Long
Dinh, Khang Ngoc
Li, Shuzhou
Ma, Fei
Yan, Qingyu
format Article
author Sun, Lan
Dai, Zhengfei
Zhong, Lixiang
Zhao, Yiwei
Cheng, Yan
Chong, Shaokun
Chen, Guanjun
Yan, Chunshuang
Zhang, Xiaoyu
Tan, Huiteng
Zhang, Long
Dinh, Khang Ngoc
Li, Shuzhou
Ma, Fei
Yan, Qingyu
author_sort Sun, Lan
title Lattice strain and atomic replacement of CoO₆ octahedra in layered sodium cobalt oxide for boosted water oxidation electrocatalysis
title_short Lattice strain and atomic replacement of CoO₆ octahedra in layered sodium cobalt oxide for boosted water oxidation electrocatalysis
title_full Lattice strain and atomic replacement of CoO₆ octahedra in layered sodium cobalt oxide for boosted water oxidation electrocatalysis
title_fullStr Lattice strain and atomic replacement of CoO₆ octahedra in layered sodium cobalt oxide for boosted water oxidation electrocatalysis
title_full_unstemmed Lattice strain and atomic replacement of CoO₆ octahedra in layered sodium cobalt oxide for boosted water oxidation electrocatalysis
title_sort lattice strain and atomic replacement of coo₆ octahedra in layered sodium cobalt oxide for boosted water oxidation electrocatalysis
publishDate 2022
url https://hdl.handle.net/10356/154701
_version_ 1773551402000318464