Surface-oriented heterostructure of iron metal organic framework confined molybdenum disulfides as an efficient bifunctional electrocatalyst for overall water splitting

Velayutham, Rajavel; Raj, C. Justin; Jang, Hyun M.; Cho, W.-J.; Palaniswamy, Karthikeyan; Kaya, Cengiz; Kim, Byung Chul

doi:10.1016/j.mtnano.2023.100387

Cited by 4 publications

(7 citation statements)

References 57 publications

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“…It can be seen that the catalysts in this work have excellent total water-splitting performance. for electrocatalysts in the recently reported literature [35,40,41,43,[45][46][47][48][49][50].…”

Section: Resultsmentioning

confidence: 99%

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Self-Supporting np-AlFeNiO Bifunctional Electrode Material for Electrochemical Water Splitting Prepared by Electrooxidation

Ma,

Xu,

Gao

et al. 2024

Energies

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Hydrogen production through water splitting is a promising path to develop renewable green energy. Effective, stable, and low-cost catalysts are the key to water splitting. In the present work, a series of self-supporting nanoporous alloys are prepared by using a dealloying process followed by electrooxidation. Among them, the np-AlFeNiO-4s sample exhibits remarkable activity (10 mA cm−2 at 32 mV for the HER and 278 mV for the OER) and good long-term stability (100 h) in alkaline conditions for both the HER and the OER. It only requires 1.56 V to reach 10 mA cm−2 current density for total water splitting performance. The very short time of electrooxidation can significantly improve the HER performance. Electrooxidation makes the metal and metal oxide sites on the electrode surface effectively coupled, which greatly enhances the kinetic rate of the Volmer and Heyrovsky steps. Appropriate electrooxidation is a rapid and easy way to improve the activity of the electrocatalyst, which has a broad application prospect in electrochemical water splitting.

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Section: Resultsmentioning

confidence: 99%

“…Figure 6. Comparison of the Tafel slope and η 10 for the reported HER catalysts[4,9,17,19,25,35,[40][41][42][43][44][45].…”

mentioning

confidence: 99%

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Self-Supporting np-AlFeNiO Bifunctional Electrode Material for Electrochemical Water Splitting Prepared by Electrooxidation

Ma,

Xu,

Gao

et al. 2024

Energies

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“…96 MoS 2 and Fe-MOF with abundant active sites were grown in situ on nickel foam (Fe-MOF@MoS 2 -6 h) by a two-step solvothermal method by R. Velayutham et al The formation of oxygen/sulfur vacancies by partial oxidation of Fe/Mo surfaces resulted in a significant enhancement of the HER activity. 97 An et al successfully constructed Ni 3 S 2 /MoS 2 catalysts with sulfur vacancies and non-homogeneous phase interfaces (VS-Ni 3 S 2 /MoS 2 ) on Ni foam by hydrothermal and hydrogen reduction methods. The abundant sulfur vacancies and heterogeneous interfaces provided a large number of active sites for the VS-Ni 3 S 2 /MoS 2 catalysts, which improved the electron and ion transport and thus enhanced the catalytic activity of electrolytic water.…”

Section: Modulation Strategies For Improving Her Catalytic Performancementioning

confidence: 99%

A review of modulation strategies for improving the catalytic performance of transition metal sulfide self-supported electrodes for the hydrogen evolution reaction

Liu,

Huang

et al. 2024

Dalton Trans.

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“…Finally, the coupling between the two components is often the source of increased material stability . To date, a large number of catalysts with heterogeneous structures by coupling two single components have been reported. , For example, Zhang et al synthesized a heterojunction of nitrogen-doped carbon-encapsulated Ni 2 P and MoP (Ni 2 P–MoP@NC) for efficient HER and OER catalysis. The heterojunction has an adjustable electronic structure based on “d-electron complementation” .…”

Section: Introductionmentioning

confidence: 99%

Oxygen Vacancy and Heterostructure Modulation of Co₂P/Fe₂P Electrocatalysts for Improving Total Water Splitting

Liu,

Hu,

Zhao

et al. 2024

ACS Appl. Mater. Interfaces

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Designing a stable and highly active catalyst for hydrogen evolution and oxygen evolution reactions (HER/OER) is essential for the industrialization of hydrogen energy but remains a major challenge. This work reports a simple approach to fabricating coupled Co 2 P/Fe 2 P nanorod array catalyst for overall water decomposition, demonstrating the source of excellent activity in the catalytic process. Under alkaline conditions, Co 2 P/Fe 2 P heterostructures exhibit an overpotential of 96 and 220 mV for HER and OER, respectively, at 10 mA cm −2 . For total water splitting, a low voltage of 1.56 V is required to provide a current density of 10 mA cm −2 . And the catalyst exhibits long-term durability for 30 h at a high current density of 250 mA cm −2 . The analysis of the results revealed that the presence of interfacial oxygen vacancies and the strong interaction between Co 2 P/Fe 2 P provided the catalyst with more electrochemically active sites and a faster charge transfer capability, which improved the hydrolysis dissociation process. Electrochemically active metal (oxygen) hydroxide phases were produced after OER stability testing. The results of this study prove its great potential in practical industrial electrolysis and provide a reasonable and feasible strategy for the design of nonprecious metal phosphide electrocatalysts.

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Surface-oriented heterostructure of iron metal organic framework confined molybdenum disulfides as an efficient bifunctional electrocatalyst for overall water splitting

Cited by 4 publications

References 57 publications

Self-Supporting np-AlFeNiO Bifunctional Electrode Material for Electrochemical Water Splitting Prepared by Electrooxidation

Self-Supporting np-AlFeNiO Bifunctional Electrode Material for Electrochemical Water Splitting Prepared by Electrooxidation

A review of modulation strategies for improving the catalytic performance of transition metal sulfide self-supported electrodes for the hydrogen evolution reaction

Oxygen Vacancy and Heterostructure Modulation of Co₂P/Fe₂P Electrocatalysts for Improving Total Water Splitting

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Surface-oriented heterostructure of iron metal organic framework confined molybdenum disulfides as an efficient bifunctional electrocatalyst for overall water splitting

Cited by 4 publications

References 57 publications

Self-Supporting np-AlFeNiO Bifunctional Electrode Material for Electrochemical Water Splitting Prepared by Electrooxidation

Self-Supporting np-AlFeNiO Bifunctional Electrode Material for Electrochemical Water Splitting Prepared by Electrooxidation

A review of modulation strategies for improving the catalytic performance of transition metal sulfide self-supported electrodes for the hydrogen evolution reaction

Oxygen Vacancy and Heterostructure Modulation of Co2P/Fe2P Electrocatalysts for Improving Total Water Splitting

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Oxygen Vacancy and Heterostructure Modulation of Co₂P/Fe₂P Electrocatalysts for Improving Total Water Splitting