Ru-RuO2 nano-heterostructures stabilized by the sacrificing oxidation strategy of Mn3O4 substrate for boosting acidic oxygen evolution reaction

Xin Long; Bin Zhao; Qianqian Zhao; Xuexian Wu; Meng-Nan Zhu; Renfei Feng; Mohsen Shakouri; Yu Zhang; Xinxin Xiao; Jiujun Zhang; Xian-Zhu Fu; Jing-Li Luo

doi:10.1016/j.apcatb.2023.123559

Ru-RuO2 nano-heterostructures stabilized by the sacrificing oxidation strategy of Mn3O4 substrate for boosting acidic oxygen evolution reaction

Xin Long, Bin Zhao, Qianqian Zhao, Xuexian Wu, Meng-Nan Zhu, Renfei Feng, Mohsen Shakouri, Yu Zhang, Xinxin Xiao, Jiujun Zhang, Xian-Zhu Fu, Jing-Li Luo

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Abstract

Designing anodic electrocatalysts with high activity and robust stability for acidic oxygen evolution reaction (OER) is significant for the large-scale promotion of sustainable proton exchange membrane water electrolysis (PEMWE). Most reported Ru-based electrocatalysts tend to further improve activity at the expense of stability. Herein, we report the synthesis of crystalline Mn ₃O ₄ supported Ru-RuO ₂ nano-heterostructures as the anodic electrocatalyst that only requires a low overpotential of 182 mV (10 mA cm ⁻²) for acidic OER, accompanied with a record stability of 400 h in 0.5 M H ₂SO ₄. The results of XPS, ICP-MS, and XAS indicate that the Mn ₃O ₄ substrate plays a crucial role in stabilizing Ru-RuO ₂ nano-heterostructure by preventing Ru from over-oxidation and dissolution. Meanwhile, DEMS with isotope labeling reveals that the Ru-RuO ₂ nano-heterostructure contributes to suppressing lattice oxygen oxidation mechanism (LOM) and concurrently expediting the involvement of adsorbate evolution mechanism (AEM) for boosting the acidic OER performance.

Original language	English
Article number	123559
Journal	Applied Catalysis B: Environmental
Volume	343
Pages (from-to)	123559
Number of pages	1
ISSN	0926-3373
DOIs	https://doi.org/10.1016/j.apcatb.2023.123559
Publication status	Published - Apr 2024

Keywords

MnO substrate
Ru-based electrocatalysts
acidic OER
heterostructure
stability

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10.1016/j.apcatb.2023.123559

https://www.sciencedirect.com/science/article/pii/S092633732301202X

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Long, X., Zhao, B., Zhao, Q., Wu, X., Zhu, M.-N., Feng, R., Shakouri, M., Zhang, Y., Xiao, X., Zhang, J., Fu, X.-Z., & Luo, J.-L. (2024). Ru-RuO2 nano-heterostructures stabilized by the sacrificing oxidation strategy of Mn3O4 substrate for boosting acidic oxygen evolution reaction. Applied Catalysis B: Environmental, 343, 123559. Article 123559. https://doi.org/10.1016/j.apcatb.2023.123559

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title = "Ru-RuO2 nano-heterostructures stabilized by the sacrificing oxidation strategy of Mn3O4 substrate for boosting acidic oxygen evolution reaction",

abstract = "Designing anodic electrocatalysts with high activity and robust stability for acidic oxygen evolution reaction (OER) is significant for the large-scale promotion of sustainable proton exchange membrane water electrolysis (PEMWE). Most reported Ru-based electrocatalysts tend to further improve activity at the expense of stability. Herein, we report the synthesis of crystalline Mn 3O 4 supported Ru-RuO 2 nano-heterostructures as the anodic electrocatalyst that only requires a low overpotential of 182 mV (10 mA cm −2) for acidic OER, accompanied with a record stability of 400 h in 0.5 M H 2SO 4. The results of XPS, ICP-MS, and XAS indicate that the Mn 3O 4 substrate plays a crucial role in stabilizing Ru-RuO 2 nano-heterostructure by preventing Ru from over-oxidation and dissolution. Meanwhile, DEMS with isotope labeling reveals that the Ru-RuO 2 nano-heterostructure contributes to suppressing lattice oxygen oxidation mechanism (LOM) and concurrently expediting the involvement of adsorbate evolution mechanism (AEM) for boosting the acidic OER performance.",

keywords = "MnO substrate, Ru-based electrocatalysts, acidic OER, heterostructure, stability",

author = "Xin Long and Bin Zhao and Qianqian Zhao and Xuexian Wu and Meng-Nan Zhu and Renfei Feng and Mohsen Shakouri and Yu Zhang and Xinxin Xiao and Jiujun Zhang and Xian-Zhu Fu and Jing-Li Luo",

year = "2024",

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doi = "10.1016/j.apcatb.2023.123559",

language = "English",

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journal = "Applied Catalysis B: Environmental",

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Long, X, Zhao, B, Zhao, Q, Wu, X, Zhu, M-N, Feng, R, Shakouri, M, Zhang, Y, Xiao, X, Zhang, J, Fu, X-Z & Luo, J-L 2024, 'Ru-RuO2 nano-heterostructures stabilized by the sacrificing oxidation strategy of Mn3O4 substrate for boosting acidic oxygen evolution reaction', Applied Catalysis B: Environmental, vol. 343, 123559, pp. 123559. https://doi.org/10.1016/j.apcatb.2023.123559

TY - JOUR

T1 - Ru-RuO2 nano-heterostructures stabilized by the sacrificing oxidation strategy of Mn3O4 substrate for boosting acidic oxygen evolution reaction

AU - Long, Xin

AU - Zhao, Bin

AU - Zhao, Qianqian

AU - Wu, Xuexian

AU - Zhu, Meng-Nan

AU - Feng, Renfei

AU - Shakouri, Mohsen

AU - Zhang, Yu

AU - Xiao, Xinxin

AU - Zhang, Jiujun

AU - Fu, Xian-Zhu

AU - Luo, Jing-Li

PY - 2024/4

Y1 - 2024/4

N2 - Designing anodic electrocatalysts with high activity and robust stability for acidic oxygen evolution reaction (OER) is significant for the large-scale promotion of sustainable proton exchange membrane water electrolysis (PEMWE). Most reported Ru-based electrocatalysts tend to further improve activity at the expense of stability. Herein, we report the synthesis of crystalline Mn 3O 4 supported Ru-RuO 2 nano-heterostructures as the anodic electrocatalyst that only requires a low overpotential of 182 mV (10 mA cm −2) for acidic OER, accompanied with a record stability of 400 h in 0.5 M H 2SO 4. The results of XPS, ICP-MS, and XAS indicate that the Mn 3O 4 substrate plays a crucial role in stabilizing Ru-RuO 2 nano-heterostructure by preventing Ru from over-oxidation and dissolution. Meanwhile, DEMS with isotope labeling reveals that the Ru-RuO 2 nano-heterostructure contributes to suppressing lattice oxygen oxidation mechanism (LOM) and concurrently expediting the involvement of adsorbate evolution mechanism (AEM) for boosting the acidic OER performance.

AB - Designing anodic electrocatalysts with high activity and robust stability for acidic oxygen evolution reaction (OER) is significant for the large-scale promotion of sustainable proton exchange membrane water electrolysis (PEMWE). Most reported Ru-based electrocatalysts tend to further improve activity at the expense of stability. Herein, we report the synthesis of crystalline Mn 3O 4 supported Ru-RuO 2 nano-heterostructures as the anodic electrocatalyst that only requires a low overpotential of 182 mV (10 mA cm −2) for acidic OER, accompanied with a record stability of 400 h in 0.5 M H 2SO 4. The results of XPS, ICP-MS, and XAS indicate that the Mn 3O 4 substrate plays a crucial role in stabilizing Ru-RuO 2 nano-heterostructure by preventing Ru from over-oxidation and dissolution. Meanwhile, DEMS with isotope labeling reveals that the Ru-RuO 2 nano-heterostructure contributes to suppressing lattice oxygen oxidation mechanism (LOM) and concurrently expediting the involvement of adsorbate evolution mechanism (AEM) for boosting the acidic OER performance.

KW - MnO substrate

KW - Ru-based electrocatalysts

KW - acidic OER

KW - heterostructure

KW - stability

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U2 - 10.1016/j.apcatb.2023.123559

DO - 10.1016/j.apcatb.2023.123559

M3 - Journal article

SN - 0926-3373

VL - 343

SP - 123559

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 123559

ER -

Ru-RuO2 nano-heterostructures stabilized by the sacrificing oxidation strategy of Mn3O4 substrate for boosting acidic oxygen evolution reaction

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