Atomic-level correlation between the electrochemical performance of an oxygen-evolving catalyst and the effects of CeO2 functionalization

Yanyan Li; Wen Luo; Duojie Wu; Qi Wang; Jie Yin; Pinxian Xi; Yongquan Qu; Meng Gu; Xinyu Zhang; Zhouguang Lu; Zhiping Zheng

doi:10.1007/s12274-021-3931-9

Atomic-level correlation between the electrochemical performance of an oxygen-evolving catalyst and the effects of CeO₂ functionalization

Yanyan Li (Co-first Author)
, Wen Luo (Co-first Author)
, Duojie Wu
, Qi Wang
, Jie Yin
, Pinxian Xi
, Yongquan Qu
, Meng Gu
, Xinyu Zhang^*
, Zhouguang Lu^* (Others)
, Zhiping Zheng^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

36 Citations (Scopus)

Abstract

Herein, we prepared a bimetallic layered double hydroxide (FeCo LDH) featuring a dandelion-like structure. Anchoring of CeO₂ onto FeCo LDH produced interfaces between the functionalizing CeO₂ and the parent LDH. Comparative electrochemical studies were carried out. Onset potential, overpotential, and Tafel slope point to the superior oxygen-evolving performance of CeO₂-FeCo LDH with respect to FeCo LDH, therefore, demonstrating the merits of CeO₂ functionalization. The electronic structures of Fe, Co, and Ce were analyzed by X-ray photoelectron spectroscopy (XPS) and electron energy loss spectroscopy (EELS) from which the increase of Co³⁺ and the concurrent lowering of Ce⁴⁺ were established. With the use of CeO₂-FeCo LDH, accelerated formation at a sizably reduced potential of Co-OOH, one of the key intermediates preceding the release of O₂ was observed by in situ Raman spectroscopy. We now have the atomic-level and location-specific evidence, the increase of the active Co³⁺ across the interface to correlate the enhanced catalytic performance with CeO₂ functionalization.

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021

Original language	English
Pages (from-to)	2994-3000
Number of pages	7
Journal	Nano Research
Volume	15
Issue number	4
Online published	18 Nov 2021
DOIs	https://doi.org/10.1007/s12274-021-3931-9
Publication status	Published - Apr 2022
Externally published	Yes

Funding

This work was financially supported by Shenzhen Nobel Prize Scientists Laboratory Project (No. C17213101), Guangdong Provincial Key Laboratory of Catalysis (No. 2020B121201002), Guangdong Provincial Key Laboratory of Energy Materials for Electric Power (No. 2018B030322001), China Postdoctoral Science Foundation (No. 2018M642133, X. Z.), Post-doctorate Scientific Research Fund for staying (coming to) Shenzhen (No. K21217502, X. Z.) and the National Natural Science Foundation of China (No. 21671096, Z. L.). Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials (ZDSYS20200421111401738, Z.L.). The authors also acknowledge the assistance of Southern University of Science and Technology Core Research Facilities (SUSTech CRF) and Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology).

Research Keywords

CeO2 nanoparticles
intermediate conversion
metal layered double hydroxides (LDHs)
oxygen evolution reaction

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Cite this

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title = "Atomic-level correlation between the electrochemical performance of an oxygen-evolving catalyst and the effects of CeO2 functionalization",

abstract = "Herein, we prepared a bimetallic layered double hydroxide (FeCo LDH) featuring a dandelion-like structure. Anchoring of CeO2 onto FeCo LDH produced interfaces between the functionalizing CeO2 and the parent LDH. Comparative electrochemical studies were carried out. Onset potential, overpotential, and Tafel slope point to the superior oxygen-evolving performance of CeO2-FeCo LDH with respect to FeCo LDH, therefore, demonstrating the merits of CeO2 functionalization. The electronic structures of Fe, Co, and Ce were analyzed by X-ray photoelectron spectroscopy (XPS) and electron energy loss spectroscopy (EELS) from which the increase of Co3+ and the concurrent lowering of Ce4+ were established. With the use of CeO2-FeCo LDH, accelerated formation at a sizably reduced potential of Co-OOH, one of the key intermediates preceding the release of O2 was observed by in situ Raman spectroscopy. We now have the atomic-level and location-specific evidence, the increase of the active Co3+ across the interface to correlate the enhanced catalytic performance with CeO2 functionalization. {\textcopyright} Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021",

keywords = "CeO2 nanoparticles, intermediate conversion, metal layered double hydroxides (LDHs), oxygen evolution reaction",

author = "Yanyan Li and Wen Luo and Duojie Wu and Qi Wang and Jie Yin and Pinxian Xi and Yongquan Qu and Meng Gu and Xinyu Zhang and Zhouguang Lu and Zhiping Zheng",

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Atomic-level correlation between the electrochemical performance of an oxygen-evolving catalyst and the effects of CeO₂ functionalization. / Li, Yanyan (Co-first Author); Luo, Wen (Co-first Author); Wu, Duojie et al.
In: Nano Research, Vol. 15, No. 4, 04.2022, p. 2994-3000.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Atomic-level correlation between the electrochemical performance of an oxygen-evolving catalyst and the effects of CeO2 functionalization

AU - Li, Yanyan

AU - Luo, Wen

AU - Wu, Duojie

AU - Wang, Qi

AU - Yin, Jie

AU - Xi, Pinxian

AU - Qu, Yongquan

AU - Gu, Meng

AU - Zhang, Xinyu

AU - Zheng, Zhiping

A2 - Lu, Zhouguang

PY - 2022/4

Y1 - 2022/4

N2 - Herein, we prepared a bimetallic layered double hydroxide (FeCo LDH) featuring a dandelion-like structure. Anchoring of CeO2 onto FeCo LDH produced interfaces between the functionalizing CeO2 and the parent LDH. Comparative electrochemical studies were carried out. Onset potential, overpotential, and Tafel slope point to the superior oxygen-evolving performance of CeO2-FeCo LDH with respect to FeCo LDH, therefore, demonstrating the merits of CeO2 functionalization. The electronic structures of Fe, Co, and Ce were analyzed by X-ray photoelectron spectroscopy (XPS) and electron energy loss spectroscopy (EELS) from which the increase of Co3+ and the concurrent lowering of Ce4+ were established. With the use of CeO2-FeCo LDH, accelerated formation at a sizably reduced potential of Co-OOH, one of the key intermediates preceding the release of O2 was observed by in situ Raman spectroscopy. We now have the atomic-level and location-specific evidence, the increase of the active Co3+ across the interface to correlate the enhanced catalytic performance with CeO2 functionalization. © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021

AB - Herein, we prepared a bimetallic layered double hydroxide (FeCo LDH) featuring a dandelion-like structure. Anchoring of CeO2 onto FeCo LDH produced interfaces between the functionalizing CeO2 and the parent LDH. Comparative electrochemical studies were carried out. Onset potential, overpotential, and Tafel slope point to the superior oxygen-evolving performance of CeO2-FeCo LDH with respect to FeCo LDH, therefore, demonstrating the merits of CeO2 functionalization. The electronic structures of Fe, Co, and Ce were analyzed by X-ray photoelectron spectroscopy (XPS) and electron energy loss spectroscopy (EELS) from which the increase of Co3+ and the concurrent lowering of Ce4+ were established. With the use of CeO2-FeCo LDH, accelerated formation at a sizably reduced potential of Co-OOH, one of the key intermediates preceding the release of O2 was observed by in situ Raman spectroscopy. We now have the atomic-level and location-specific evidence, the increase of the active Co3+ across the interface to correlate the enhanced catalytic performance with CeO2 functionalization. © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021

KW - CeO2 nanoparticles

KW - intermediate conversion

KW - metal layered double hydroxides (LDHs)

KW - oxygen evolution reaction

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DO - 10.1007/s12274-021-3931-9

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JO - Nano Research

JF - Nano Research

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ER -