An efficient and robust noble-metal-free self-standing bifunctional water electrolysis catalyst: Co3S4@Ex.NiFe-LDH for alkaline water electrolysis

Kumari, Sonu; Mitra, Rahul; Biswas, Krishanu; Halder, Aditi

doi:10.1016/j.ijhydene.2024.07.228

International Journal of Hydrogen Energy

2024

DOI: 10.1016/j.ijhydene.2024.07.228

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An efficient and robust noble-metal-free self-standing bifunctional water electrolysis catalyst: Co3S4@Ex.NiFe-LDH for alkaline water electrolysis

Sonu Kumari,

Rahul Mitra,

Krishanu Biswas

et al.

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Cited by 2 publications

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Ion liquid treatment for high-performance NiSe/CNT water electrolysis catalyst

Fan,

Shen,

Zhao

et al. 2024

International Journal of Hydrogen Energy

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Ion liquid treatment for high-performance NiSe/CNT water electrolysis catalyst

Fan,

Shen,

Zhao

et al. 2024

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Factorial Optimization of CoCuFe-LDH/Graphene Ternary Composites as Electrocatalysts for Water Splitting

Alves,

Moral,

Jayakumari

et al. 2024

ACS Appl. Mater. Interfaces

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The layered double hydroxides (LDHs) have demonstrated significant potential as non-noble-metal electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Their unique compositional and structural properties contribute to their efficiency and stability as catalysts. In this study, CoCuFe-LDH composites were grown on graphene (G) via a cost-effective and straightforward one-step hydrothermal process. A 2-level full-factorial model was employed to determine the impact of Co (1.5, 3, and 4.5 mmol) and graphene (10, 30, and 50 mg) concentrations on the onset potential of OER and HER, which were the chosen response variables. OER and HER activity variabilities were assessed in triplicate using Co[3]Cu[3]Fe[3]-LDH/G[30] (central point), which were determined at 0.01% and 0.02%, respectively. Statistical analyses demonstrated that Co[4.5]Cu[3]Fe[3]-LDH/G[10] and Co[1.5]Cu[3]Fe[3]-LDH/G[10] showed the lowest onset potential at 1.52 V and −0.32 V (V vs RHE) for the OER and HER, respectively, suggesting that a high cobalt concentration enhances OER performance, while optimal HER catalysis was achieved with lower cobalt concentrations. Moreover, the trimetallic composites exhibited good stability with negligible loss of catalytic activity over 24 h.

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An efficient and robust noble-metal-free self-standing bifunctional water electrolysis catalyst: Co3S4@Ex.NiFe-LDH for alkaline water electrolysis

Cited by 2 publications

References 71 publications

Ion liquid treatment for high-performance NiSe/CNT water electrolysis catalyst

Ion liquid treatment for high-performance NiSe/CNT water electrolysis catalyst

Factorial Optimization of CoCuFe-LDH/Graphene Ternary Composites as Electrocatalysts for Water Splitting

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