Regulating the Interfacial Electron Density of La0.8Sr0.2Mn0.5Co0.5O3/RuOxfor Efficient and Low-Cost Bifunctional Oxygen Electrocatalysts and Rechargeable Zn-Air Batteries

Yawen Dai; Jie Yu; Zhenbao Zhang; Shuo Zhai; Chun Cheng; Siyuan Zhao; Peng Tan; Zongping Shao; Meng Ni

doi:10.1021/acsami.1c18081

Regulating the Interfacial Electron Density of La_0.8Sr_0.2Mn_0.5Co_0.5O₃/RuO_xfor Efficient and Low-Cost Bifunctional Oxygen Electrocatalysts and Rechargeable Zn-Air Batteries

Yawen Dai, Jie Yu, Zhenbao Zhang, Shuo Zhai, Chun Cheng, Siyuan Zhao, Peng Tan, Zongping Shao, Meng Ni

Research output: Journal article publication › Journal article › Academic research › peer-review

4 Citations (Scopus)

Abstract

La0.8Sr0.2Mn0.5Co0.5O3 (LSMC) perovskite anchored with RuOx (LSMC-Ru) is fabricated as a new bifunctional electrocatalyst, with low dosage (2.43 wt %) and high utilization of noble metal Ru. The LSMC-Ru exhibits outstanding bifunctional activity with a low potential gap of 0.72 V between the oxygen evolution reaction (OER) potential at 10 mA cm-2 and the oxygen reduction reaction (ORR) half-wave potential. The strong electronic interaction between RuOx and LSMC is confirmed by both experiments and theoretical calculations. Consequently, the electron-rich Mn centers promote ORR, while the electron-deficient Ru centers facilitate OER. A Zn-air battery using the LSMC-Ru air electrode delivers a peak power density of 159 mW cm-2 and a low charge-discharge potential gap of 0.58 V at 2 mA cm-2. The high round-trip energy efficiency of 60.6% is retained after 300 cycles. This strategy of anchoring a low dosage noble metal catalyst to perovskite can be extended to other systems of noble metal-non-noble metal composite electrocatalysts to achieve both competitive performance and low cost.

Original language	English
Journal	ACS Applied Materials and Interfaces
DOIs	https://doi.org/10.1021/acsami.1c18081
Publication status	Accepted/In press - 2021

Keywords

electronic structure regulation
oxygen evolution reaction
oxygen reduction reaction
perovskite oxide
Zn-air battery

ASJC Scopus subject areas

Materials Science(all)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

More information

10.1021/acsami.1c18081

Cite this

@article{23cb298849ed470687385b9421ec4f21,

title = "Regulating the Interfacial Electron Density of La0.8Sr0.2Mn0.5Co0.5O3/RuOxfor Efficient and Low-Cost Bifunctional Oxygen Electrocatalysts and Rechargeable Zn-Air Batteries",

abstract = "La0.8Sr0.2Mn0.5Co0.5O3 (LSMC) perovskite anchored with RuOx (LSMC-Ru) is fabricated as a new bifunctional electrocatalyst, with low dosage (2.43 wt %) and high utilization of noble metal Ru. The LSMC-Ru exhibits outstanding bifunctional activity with a low potential gap of 0.72 V between the oxygen evolution reaction (OER) potential at 10 mA cm-2 and the oxygen reduction reaction (ORR) half-wave potential. The strong electronic interaction between RuOx and LSMC is confirmed by both experiments and theoretical calculations. Consequently, the electron-rich Mn centers promote ORR, while the electron-deficient Ru centers facilitate OER. A Zn-air battery using the LSMC-Ru air electrode delivers a peak power density of 159 mW cm-2 and a low charge-discharge potential gap of 0.58 V at 2 mA cm-2. The high round-trip energy efficiency of 60.6% is retained after 300 cycles. This strategy of anchoring a low dosage noble metal catalyst to perovskite can be extended to other systems of noble metal-non-noble metal composite electrocatalysts to achieve both competitive performance and low cost. ",

keywords = "electronic structure regulation, oxygen evolution reaction, oxygen reduction reaction, perovskite oxide, Zn-air battery",

author = "Yawen Dai and Jie Yu and Zhenbao Zhang and Shuo Zhai and Chun Cheng and Siyuan Zhao and Peng Tan and Zongping Shao and Meng Ni",

note = "Funding Information: Y.W.D. thanks the support by the PhD Fellowship of Research Grant Council, University Grants Committee, HK SAR. M.N. thanks the support by the Collaborative Research Fund (CRF) (project no. C5031-20G) of Research Grant Council, University Grants Committee, HK SAR. We thank Professor Zijian Zheng from Institute of Textiles & Clothing of The Hong Kong Polytechnic University for the discussing and chemical support. We also thank Shiyanjia Lab ( www.shiyanjia.com ) for the help of characterization in ICP, EDX-mapping, and EELS spectra. Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",

year = "2021",

doi = "10.1021/acsami.1c18081",

language = "English",

journal = "ACS applied materials & interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

}

TY - JOUR

T1 - Regulating the Interfacial Electron Density of La0.8Sr0.2Mn0.5Co0.5O3/RuOxfor Efficient and Low-Cost Bifunctional Oxygen Electrocatalysts and Rechargeable Zn-Air Batteries

AU - Dai, Yawen

AU - Yu, Jie

AU - Zhang, Zhenbao

AU - Zhai, Shuo

AU - Cheng, Chun

AU - Zhao, Siyuan

AU - Tan, Peng

AU - Shao, Zongping

AU - Ni, Meng

N1 - Funding Information: Y.W.D. thanks the support by the PhD Fellowship of Research Grant Council, University Grants Committee, HK SAR. M.N. thanks the support by the Collaborative Research Fund (CRF) (project no. C5031-20G) of Research Grant Council, University Grants Committee, HK SAR. We thank Professor Zijian Zheng from Institute of Textiles & Clothing of The Hong Kong Polytechnic University for the discussing and chemical support. We also thank Shiyanjia Lab ( www.shiyanjia.com ) for the help of characterization in ICP, EDX-mapping, and EELS spectra. Publisher Copyright: © 2021 American Chemical Society.

PY - 2021

Y1 - 2021

N2 - La0.8Sr0.2Mn0.5Co0.5O3 (LSMC) perovskite anchored with RuOx (LSMC-Ru) is fabricated as a new bifunctional electrocatalyst, with low dosage (2.43 wt %) and high utilization of noble metal Ru. The LSMC-Ru exhibits outstanding bifunctional activity with a low potential gap of 0.72 V between the oxygen evolution reaction (OER) potential at 10 mA cm-2 and the oxygen reduction reaction (ORR) half-wave potential. The strong electronic interaction between RuOx and LSMC is confirmed by both experiments and theoretical calculations. Consequently, the electron-rich Mn centers promote ORR, while the electron-deficient Ru centers facilitate OER. A Zn-air battery using the LSMC-Ru air electrode delivers a peak power density of 159 mW cm-2 and a low charge-discharge potential gap of 0.58 V at 2 mA cm-2. The high round-trip energy efficiency of 60.6% is retained after 300 cycles. This strategy of anchoring a low dosage noble metal catalyst to perovskite can be extended to other systems of noble metal-non-noble metal composite electrocatalysts to achieve both competitive performance and low cost.

AB - La0.8Sr0.2Mn0.5Co0.5O3 (LSMC) perovskite anchored with RuOx (LSMC-Ru) is fabricated as a new bifunctional electrocatalyst, with low dosage (2.43 wt %) and high utilization of noble metal Ru. The LSMC-Ru exhibits outstanding bifunctional activity with a low potential gap of 0.72 V between the oxygen evolution reaction (OER) potential at 10 mA cm-2 and the oxygen reduction reaction (ORR) half-wave potential. The strong electronic interaction between RuOx and LSMC is confirmed by both experiments and theoretical calculations. Consequently, the electron-rich Mn centers promote ORR, while the electron-deficient Ru centers facilitate OER. A Zn-air battery using the LSMC-Ru air electrode delivers a peak power density of 159 mW cm-2 and a low charge-discharge potential gap of 0.58 V at 2 mA cm-2. The high round-trip energy efficiency of 60.6% is retained after 300 cycles. This strategy of anchoring a low dosage noble metal catalyst to perovskite can be extended to other systems of noble metal-non-noble metal composite electrocatalysts to achieve both competitive performance and low cost.

KW - electronic structure regulation

KW - oxygen evolution reaction

KW - oxygen reduction reaction

KW - perovskite oxide

KW - Zn-air battery

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U2 - 10.1021/acsami.1c18081

DO - 10.1021/acsami.1c18081

M3 - Journal article

AN - SCOPUS:85121908817

SN - 1944-8244

JO - ACS applied materials & interfaces

JF - ACS applied materials & interfaces

ER -