Cu-Based Multicomponent Metallic Compound Materials as Electrocatalyst for Water Splitting

Wang, Peijia; An, Jie; Ye, Zhenyu; Cai, Wei; Zheng, Xiaohang

doi:10.3389/fchem.2022.913874

Cited by 6 publications

(3 citation statements)

References 40 publications

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“…The closer the atomic ratio of Cu to W is to 1:1, the higher the HER activity of the sample. Figure c illustrates the low overpotential of the Cu 50 W 50 in comparison with those reported for Cu-containing, W-containing, and amorphous HER catalysts, − highlighting the superior activity of our Cu 50 W 50 . The HER kinetics in alkaline media was further analyzed by using Tafel plots (Figure d).…”

Section: Resultsmentioning

confidence: 73%

Amorphous Cu–W Alloys as Stable and Efficient Electrocatalysts for Hydrogen Evolution

Jian,

Zhang,

Yang

et al. 2024

ACS Catal.

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Cu and W are completely immiscible in equilibrium conditions, and neither of them is a good catalytic element for the electrochemical hydrogen evolution reaction (HER) due to their hydrogen adsorption Gibbs free energy (ΔG H) being too positive or negative, respectively. However, the combination of Cu with W could potentially result in a moderate ΔG H. In this study, a series of binary amorphous Cu–W alloys are fabricated via a magnetron sputtering method. The optimal HER catalytic performance is demonstrated when the nominal component is Cu50W50, showing an overpotential of only 65 mV at 10 mA cm–2 in 1 M KOH. Accordingly, density functional theory calculations show that the amorphous Cu50W50 alloy has a close-to-zero ΔG H compared to the pure Cu and W metals, accounting for its HER activity. In addition, the amorphous Cu50W50 alloy shows no obvious degradation at 100 mA cm–2 for 200 h, highlighting its long-term durability. This work provides a versatile strategy for the preparation of amorphous alloys with completely immiscible components and insights into the compositional design of nonprecious metal electrocatalysts for widespread applications.

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Section: Resultsmentioning

confidence: 73%

Amorphous Cu–W Alloys as Stable and Efficient Electrocatalysts for Hydrogen Evolution

Jian,

Zhang,

Yang

et al. 2024

ACS Catal.

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“…[3][4][5] In particular, the electrochemical oxygen evolution reaction (OER) is an important process in all these energy conversion and storage devices. [6][7][8] Nevertheless, the multi-electron transfer process of OER is a thermodynamically uphill task that requires stable and efficient electrocatalysts for reducing the overpotential (h). 9,10 The precious metal-based RuO 2 and IrO 2 show excellent activity; however, their scarcity and high cost restrict their extensive practical usage.…”

Section: Introductionmentioning

confidence: 99%

Highly enhanced electrocatalytic OER activity of water-coordinated copper complexes: effect of lattice water and bridging ligand

et al. 2023

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“…Noble metals (e.g., Ru and Ir) and their oxides (e.g., RuO 2 and IrO 2 ) are the most well-known electrocatalysts for OER. However, their large-scale application has been limited by their high cost, scarcity and weak alkaline stability ( Wang et al, 2022a ). Consequently, it is highly desirable to develop durable, low-cost electrocatalysts for OER with high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Dealloying fabrication of hierarchical porous Nickel–Iron foams for efficient oxygen evolution reaction

et al. 2022

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Designing and preparing highly active oxygen evolution reaction (OER) electrodes are essential for improving the overall efficiency of water splitting. Increasing the number of active sites is the simplest way to enhance OER performance. Herein, we present a dealloy-etched Ni–Fe foam with a hierarchical nanoporous structure as integrated electrodes with excellent performance for OER. Using the dealloying method on the Ni–Fe foam framework, a nanoporous structure is produced, which is named nanoporous Ni–Fe@Ni–Fe foam (NP-NF@NFF). Because of the peculiarities of the dealloying method, the NP-NF@NFF produced contains oxygen vacancies and heterojunctions. As a result, NP-NF@NFF electrode outperforms state-of-the-art noble metal catalysts with an extremely low overpotential of 210 and 285 mV at current densities of 10 and 100 mA cm−2, respectively. Additionally, the NP-NF@NFF electrode shows a 60-h stability period. Therefore, NP-NF@NFF provides new insights into the investigation of high-performance transition metal foam electrodes with effective active sites for efficient oxygen evolution at high current densities.

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Cu-Based Multicomponent Metallic Compound Materials as Electrocatalyst for Water Splitting

Cited by 6 publications

References 40 publications

Amorphous Cu–W Alloys as Stable and Efficient Electrocatalysts for Hydrogen Evolution

Amorphous Cu–W Alloys as Stable and Efficient Electrocatalysts for Hydrogen Evolution

Highly enhanced electrocatalytic OER activity of water-coordinated copper complexes: effect of lattice water and bridging ligand

Dealloying fabrication of hierarchical porous Nickel–Iron foams for efficient oxygen evolution reaction

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