Non-noble metal catalysts for preventing chlorine evolution reaction in electrolytic seawater splitting

Guan, Zhuo; Lin, Yi; Wu, Lan; Guo, Daying; Chen, Xi’an; Wang, Shun

doi:10.1039/d3se00746d

Cited by 6 publications

(2 citation statements)

References 125 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[39][40][41][42] On the other hand, direct seawater electrolysis can use a seawater, the most plentiful water resource (~97 %) on our planet, as a feedsock to produce hydrogen. [15,43] Importantly, for realizing direct seawater electrolysis, the electrocatalytically active phase required corrosion resistance under seawater conditions besides strong adhesion to current collector to obtain sufficient catalyst robustness. Usually, the conventional powder catalysts are mixed with polymer binder (Nafion) and additives for making working electrodes, which results in an increase in resistance with low electrical conductivity,hindered active sites, and poor adhesive force between the catalytic active site and substrate.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, researchers have proposed different strategies including thermodynamic design principles, selective site optimization, and fabricating Cl À blocking layers. [43,44,[53][54][55] Optimizing the reaction site in selectivity for OER has been reported widespread of non-precious self-supported catalysts. At the same time, they can also be improved by introducing a barrier layer (Cl À blocking layer) that is impermeable to Cl but permeable to water.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Self‐Supported Electrocatalyst for Seawater Splitting

Enkhbayar,

Gaur,

Jang

et al. 2024

ChemElectroChem

View full text Add to dashboard Cite

Over the past decades, tremendous effort has been made to enhance the water‐splitting via fabricating eco‐friendly electrocatalyst with increased conductivity, and large number of accessible active sites in lab scale. However, the development of earth abundant efficient electrocatalyst with superior activity for ‐seawater‐splitting remains a great challenge for the researchers. In this regard, self‐supported catalysts are found to be the most promising candidates, they have the features of increased loading, superior adhesion, rapid mass and charge transfer, and easy wettability for large scale hydrogen production via electrochemical seawater splitting. This review investigates different fabrication processes for the self‐supported catalyst, emphasizing their distinct characteristics that contribute to improved activity. Furthermore, we provided a detailed elucidation of the procedure and characteristics of seawater splitting, emphasizing the most recent progress in the creation of self‐supportive catalyst for the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and bifunctional activity. We have also examined the current barriers and potential prospects for advancing the utilization of self‐supported catalysts in the process of seawater splitting.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Self‐Supported Electrocatalyst for Seawater Splitting

Enkhbayar,

Gaur,

Jang

et al. 2024

ChemElectroChem

View full text Add to dashboard Cite

show abstract

Efficient Alkaline Freshwater/Seawater Hydrogen Production via Heterogeneous N‐Doped FeMoO₄/Mo₂N Rod‐Shaped Electrocatalysts

He,

Tu,

Gan

et al. 2024

ChemSusChem

View full text Add to dashboard Cite

Durable and efficient Fe‐based electrocatalysts in alkaline freshwater/seawater electrolysis is highly desirable but persists a significant challenge. Herein, we report a durable and robust heterogenous nitrogen‐doped FeMoO4/Mo2N rod‐shaped catalyst on nickel foam (denoted NF@FMO/MN) affording hydrogen evolution reaction (HER) low overpotentials of 23/29 mV@10 mA cm−2 and 112/159 mV@100 mA cm−2 in both alkaline freshwater/seawater electrolytes, respectively. These results are significantly superior to the pristine FeMoO4 catalyst. Theoretical calculations consistently reveals that the combination of N‐FeMoO4 and Mo2N effectively reduces water activation energy barrier, modulates the sluggish water‐dissociation kinetics and accelerates the hydrogen adsorption process for efficient HER. The enhanced HER performance of the as‐designed NF@FMO/MN catalyst is attributed to the in situ hetero‐interfacial engineering between N‐doped FeMoO4 and Mo2N. This present work nurtures the progress of FeMo‐based electrocatalysts in alkaline freshwater/seawater electrolysis.

show abstract

Controlled Synthesis of 2D Nanostructured Bimetallic Oxide (NiMoO₄) on Self‐Supported Nickel Foam for Boosted Electrocatalytic Seawater Oxidation Performance

Shanmugam,

Santhana Krishnan,

Eswaran

et al. 2024

Energy Tech

View full text Add to dashboard Cite

The design and development of effective electrocatalysts containing nonprecious materials for oxygen evolution reaction (OER) in seawater splitting remains a significant challenge for large‐scale industrial hydrogen production. Nonprecious bimetallic oxide‐constructed catalysts are utmost promising candidates to obtain boosting electrochemical water oxidation performance. Herein, a transition bimetallic oxide nanostructure electrocatalyst as NiMoO4 vertically standing nanosheet over the nickel foam substrate (NiMoO4/NF) for electrochemical water oxidation process in alkaline fresh/simulated seawater conditions is presented. NiMoO4 nanostructure on NF substrate is successfully obtained using a straightforward hydrothermal reaction route and thermal annealing processes. The surface morphology with elemental characteristics of the resultant NiMoO4/NF sample exposes highly homogenous vertical standing nanosheets assembled on the NF surface. The electrochemical water oxidation performance of the as‐prepared electrodes demonstrates the function of diverse hydrothermal reaction times (3, 6, and 9 h) in fresh and simulated seawater electrolyte conditions. In alkaline seawater electrolyte conditions, optimal hydrothermal reaction time‐assisted NiMoO4/NF‐6 h electrocatalyst possesses significant OER electrocatalytic actives compared to the other samples. Similarly, NiMoO4/NF‐6 h catalyst exhibits a small overpotential of 429 mV to achieve a current density of 50 mA cm−2 with a Tafel slope value of 122 mV dec−1 for OER process. As a result, the resultant superior electrocatalytic performance of the optimal hydrothermal reaction time‐aided electrocatalyst (NiMoO4/NF‐6 h) is ascribed to highly accessible catalytic active centers and enhanced charge transfer kinetics at the interface for electrochemical reactions. Thus, proposed nanostructure‐constructed electrocatalysts could prove to be prospective OER candidates for electrochemical water oxidation.

show abstract

Non-noble metal catalysts for preventing chlorine evolution reaction in electrolytic seawater splitting

Abstract: Compared with freshwater resources, seawater has lower cost and is more abundant in resources. However, the abundance of chloride ions in seawater affects the oxygen evolution reaction of anodes, so...

Cited by 6 publications

References 125 publications

Self‐Supported Electrocatalyst for Seawater Splitting

Self‐Supported Electrocatalyst for Seawater Splitting

Efficient Alkaline Freshwater/Seawater Hydrogen Production via Heterogeneous N‐Doped FeMoO₄/Mo₂N Rod‐Shaped Electrocatalysts

Controlled Synthesis of 2D Nanostructured Bimetallic Oxide (NiMoO₄) on Self‐Supported Nickel Foam for Boosted Electrocatalytic Seawater Oxidation Performance

Contact Info

Product

Resources

About

Non-noble metal catalysts for preventing chlorine evolution reaction in electrolytic seawater splitting

Abstract: Compared with freshwater resources, seawater has lower cost and is more abundant in resources. However, the abundance of chloride ions in seawater affects the oxygen evolution reaction of anodes, so...

Cited by 6 publications

References 125 publications

Self‐Supported Electrocatalyst for Seawater Splitting

Self‐Supported Electrocatalyst for Seawater Splitting

Efficient Alkaline Freshwater/Seawater Hydrogen Production via Heterogeneous N‐Doped FeMoO4/Mo2N Rod‐Shaped Electrocatalysts

Controlled Synthesis of 2D Nanostructured Bimetallic Oxide (NiMoO4) on Self‐Supported Nickel Foam for Boosted Electrocatalytic Seawater Oxidation Performance

Contact Info

Product

Resources

About

Efficient Alkaline Freshwater/Seawater Hydrogen Production via Heterogeneous N‐Doped FeMoO₄/Mo₂N Rod‐Shaped Electrocatalysts

Controlled Synthesis of 2D Nanostructured Bimetallic Oxide (NiMoO₄) on Self‐Supported Nickel Foam for Boosted Electrocatalytic Seawater Oxidation Performance