Unlocking the Effects of the RuCo Alloy Ratio on Alkaline Hydrogen Production

Xing Ji; Zhenzhen Wang; Zefeng Fang; Zhongzhe Wei; Jing Wang

doi:10.1021/acsami.4c13175

Unlocking the Effects of the RuCo Alloy Ratio on Alkaline Hydrogen Production

Xing Ji, Zhenzhen Wang, Zefeng Fang, Zhongzhe Wei^*, Jing Wang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Understanding the interaction between Ru and Co components and the alloy ratio effects on the catalytic process is a technical challenge that requires a precise alloy structural design. This study proposes an effective stepwise annealing method for the construction of RuCo alloy-based electrocatalysts with varied Ru:Co ratios. Interestingly, as the concentration of Co in the first-step pyrolysis products increases, the secondary pyrolysis results in RuCo composites undergoing a transition from incomplete alloying to alloy ratios of 1:1, 1:2, and 1:8. When the alloy ratio is 1:1, more Ruⁿ⁺ and Co⁰ transform into Ru⁰ and Co^2/3+. In 1 M KOH, RuCo-0.6/NC demonstrates outstanding catalytic performance and durability even superior to that of commercial Pt/C, delivering a lower overpotential of 16 mV at 10 mA cm^-2. DFT calculations reveal that the fast H₂O dissociation and moderate H adsorption guarantee the superior activity of RuCo.

Original language	English
Pages (from-to)	63560-63568
Number of pages	9
Journal	ACS Applied Materials and Interfaces
Volume	16
Issue number	46
DOIs	https://doi.org/10.1021/acsami.4c13175
Publication status	Published - 20 Nov 2024
Externally published	Yes

Keywords

RuCo alloy
alloy ratio effect
electrocatalyst
hydrogen evolution reaction

UN SDGs

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

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10.1021/acsami.4c13175

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title = "Unlocking the Effects of the RuCo Alloy Ratio on Alkaline Hydrogen Production",

abstract = "Understanding the interaction between Ru and Co components and the alloy ratio effects on the catalytic process is a technical challenge that requires a precise alloy structural design. This study proposes an effective stepwise annealing method for the construction of RuCo alloy-based electrocatalysts with varied Ru:Co ratios. Interestingly, as the concentration of Co in the first-step pyrolysis products increases, the secondary pyrolysis results in RuCo composites undergoing a transition from incomplete alloying to alloy ratios of 1:1, 1:2, and 1:8. When the alloy ratio is 1:1, more Run+ and Co0 transform into Ru0 and Co2/3+. In 1 M KOH, RuCo-0.6/NC demonstrates outstanding catalytic performance and durability even superior to that of commercial Pt/C, delivering a lower overpotential of 16 mV at 10 mA cm-2. DFT calculations reveal that the fast H2O dissociation and moderate H adsorption guarantee the superior activity of RuCo.",

keywords = "RuCo alloy, alloy ratio effect, electrocatalyst, hydrogen evolution reaction",

author = "Xing Ji and Zhenzhen Wang and Zefeng Fang and Zhongzhe Wei and Jing Wang",

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doi = "10.1021/acsami.4c13175",

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T1 - Unlocking the Effects of the RuCo Alloy Ratio on Alkaline Hydrogen Production

AU - Ji, Xing

AU - Wang, Zhenzhen

AU - Fang, Zefeng

AU - Wei, Zhongzhe

AU - Wang, Jing

PY - 2024/11/20

Y1 - 2024/11/20

N2 - Understanding the interaction between Ru and Co components and the alloy ratio effects on the catalytic process is a technical challenge that requires a precise alloy structural design. This study proposes an effective stepwise annealing method for the construction of RuCo alloy-based electrocatalysts with varied Ru:Co ratios. Interestingly, as the concentration of Co in the first-step pyrolysis products increases, the secondary pyrolysis results in RuCo composites undergoing a transition from incomplete alloying to alloy ratios of 1:1, 1:2, and 1:8. When the alloy ratio is 1:1, more Run+ and Co0 transform into Ru0 and Co2/3+. In 1 M KOH, RuCo-0.6/NC demonstrates outstanding catalytic performance and durability even superior to that of commercial Pt/C, delivering a lower overpotential of 16 mV at 10 mA cm-2. DFT calculations reveal that the fast H2O dissociation and moderate H adsorption guarantee the superior activity of RuCo.

AB - Understanding the interaction between Ru and Co components and the alloy ratio effects on the catalytic process is a technical challenge that requires a precise alloy structural design. This study proposes an effective stepwise annealing method for the construction of RuCo alloy-based electrocatalysts with varied Ru:Co ratios. Interestingly, as the concentration of Co in the first-step pyrolysis products increases, the secondary pyrolysis results in RuCo composites undergoing a transition from incomplete alloying to alloy ratios of 1:1, 1:2, and 1:8. When the alloy ratio is 1:1, more Run+ and Co0 transform into Ru0 and Co2/3+. In 1 M KOH, RuCo-0.6/NC demonstrates outstanding catalytic performance and durability even superior to that of commercial Pt/C, delivering a lower overpotential of 16 mV at 10 mA cm-2. DFT calculations reveal that the fast H2O dissociation and moderate H adsorption guarantee the superior activity of RuCo.

KW - RuCo alloy

KW - alloy ratio effect

KW - electrocatalyst

KW - hydrogen evolution reaction

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U2 - 10.1021/acsami.4c13175

DO - 10.1021/acsami.4c13175

M3 - Article

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SN - 1944-8244

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JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 46

ER -

Unlocking the Effects of the RuCo Alloy Ratio on Alkaline Hydrogen Production

Abstract

Keywords

UN SDGs

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