Constructing Adjustable Heterointerface for Enhancing Acidic Oxygen Evolution Performances of RuO<sub>2</sub>@CoMnO<sub>3</sub> Nanosheets Electrocatalysts

Zhang, Jinyang; Qin, Hongye; Cao, Xuejie; Jia, Wenqi; Ma, Rongpeng; Chen, Xiaojie; Xia, Wei; Lin, Guangliang; Jiao, Lifang

doi:10.1021/acsmaterialslett.4c00778

ACS Materials Lett.

2024

DOI: 10.1021/acsmaterialslett.4c00778

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Constructing Adjustable Heterointerface for Enhancing Acidic Oxygen Evolution Performances of RuO₂@CoMnO₃ Nanosheets Electrocatalysts

Jinyang Zhang,

Hongye Qin,

Xuejie Cao

et al.

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High-Entropy Ruthenium-Based Oxides with Rich Grain Boundaries for Efficient Oxygen Evolution

Che,

Zhang,

et al. 2024

ACS Materials Lett.

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Developing efficient and stable oxygen evolution reaction (OER) electrocatalysts is essential for the production of hydrogen from water electrolysis. Here, we successfully synthesized a high-entropy ruthenium-based oxide (RuMnFeCoNiO-HEO) with rich grain boundaries using a fast and nonequilibrium molten salt method. The RuMnFeCoNiO-HEO with significantly reduced ruthenium dosage could exhibit much higher OER performance with a low overpotential of 190 mV at 10 mA/cm2 and long-term durability of 100-h continuous operation under 100 mA/cm2 in alkaline solution. The mass activity and turnover frequency of RuFeCoNiMn-HEO are significantly enhanced by nearly 1 order of magnitude compared to those of commercial RuO2. Microstructural characterizations reveal that the incorporation of four extra 3d transition metals into ruthenium oxides results in the formation of Ru-based high-entropy materials with a rich grain boundary structure and unsaturated coordination Ru active centers, which optimize both the electrocatalytic activity and electrochemical durability of RuMnFeCoNiO-HEO during the OER process.

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High-Entropy Ruthenium-Based Oxides with Rich Grain Boundaries for Efficient Oxygen Evolution

Che,

Zhang,

et al. 2024

ACS Materials Lett.

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Constructing Adjustable Heterointerface for Enhancing Acidic Oxygen Evolution Performances of RuO₂@CoMnO₃ Nanosheets Electrocatalysts

Cited by 1 publication

References 34 publications

High-Entropy Ruthenium-Based Oxides with Rich Grain Boundaries for Efficient Oxygen Evolution

High-Entropy Ruthenium-Based Oxides with Rich Grain Boundaries for Efficient Oxygen Evolution

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Constructing Adjustable Heterointerface for Enhancing Acidic Oxygen Evolution Performances of RuO2@CoMnO3 Nanosheets Electrocatalysts

Cited by 1 publication

References 34 publications

High-Entropy Ruthenium-Based Oxides with Rich Grain Boundaries for Efficient Oxygen Evolution

High-Entropy Ruthenium-Based Oxides with Rich Grain Boundaries for Efficient Oxygen Evolution

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Constructing Adjustable Heterointerface for Enhancing Acidic Oxygen Evolution Performances of RuO₂@CoMnO₃ Nanosheets Electrocatalysts