Rhombohedrally stacked layered transition metal dichalcogenides and their electrocatalytic applications

Pramoda, K.; Chithaiah, Pallellappa; Rao, C. N. R.

doi:10.1039/d4nr02021a

Nanoscale

2024

DOI: 10.1039/d4nr02021a

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Rhombohedrally stacked layered transition metal dichalcogenides and their electrocatalytic applications

K. Pramoda,

Pallellappa Chithaiah,

C. N. R. Rao

Abstract: Layered transition metal dichalcogenides (TMDCs) are extensively investigated as catalyst materials for wide range of electrochemical applications due to their high surface area, versatile electronic and chemical properties. Bulk TMDCs...

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Cited by 2 publications

References 132 publications

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Non-Precious Tetra-(4-methylthiazole)-carboxamide Cobalt(II) Phthalocyanine Supported on Functionalized Carbon Nanotubes as an Efficient Electrocatalyst for a Hydrogen Evolution Reaction

Mounesh,

Thippeswamy,

Shiralkar

et al. 2024

ACS Appl. Energy Mater.

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Hydrogen production by water splitting has gained significant attention due to a rise in demand for sustainable hydrogen fuel. In the present study, we report the synthesis of a novel, low-cost tetra-(4-methylthiazole)-carboxamide cobalt(II) phthalocyanine coordination polymer compound, denoted CoTMTCAPc, utilizing it as a catalyst for an electrocatalytic hydrogen evolution reaction (HER). This CoTMTCAPc compound shows satisfactory HER activity with an overpotential of 172 mV (vs RHE) at 10 mA cm–2 and a Tafel slope of 147 mV dec–1. To further improve its electrocatalytic HER performance, the CoTMTCAPc compound is coupled with carboxyl-functionalized multiwalled carbon nanotubes (f-MWCNT). The synthesized CoTMTCAPc/f-MWCNT nanocomposite demonstrates HER activity on par with the benchmark Pt/C catalyst with an overpotential of 81 mV (vs RHE) at 10 mA cm–2 and a Tafel slope of 41 mV dec–1 with excellent stability. A mixture of CoTMTCAPc and bare MWCNT (without functionalization), on the other hand, does not give any notable hydrogen evolution activity. The piled-up CoTMTCAPc and f-MWCNT moieties are held together by van der Waals attraction and exhibit robust HER activity under harsh chemical conditions. Second, surface functionalities of f-MWCNT enhance dispersibility and assist in a homogeneous distribution of individual components, thereby improving charge-transfer interactions. The extraordinary HER performance of the CoTMTCAPc/f-MWCNT nanocomposite is attributed to abundant active sites due to homogeneously distributed CoTMTCAPc over f-MWCNT and improved electronic conductivity and charge-transfer rate. The coupling of the CoTMTCAPc moiety with f-MWCNT appears to be advantageous for electrocatalysis and other related applications.

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Non-Precious Tetra-(4-methylthiazole)-carboxamide Cobalt(II) Phthalocyanine Supported on Functionalized Carbon Nanotubes as an Efficient Electrocatalyst for a Hydrogen Evolution Reaction

Mounesh,

Thippeswamy,

Shiralkar

et al. 2024

ACS Appl. Energy Mater.

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Transition Metal Dichalcogenides in Electrocatalytic Water Splitting

Zeng,

Liu,

Huang

et al. 2024

Catalysts

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Two-dimensional transition metal dichalcogenides (TMDs), also known as MX2, have attracted considerable attention due to their structure analogous to graphene and unique properties. With superior electronic characteristics, tunable bandgaps, and an ultra-thin two-dimensional structure, they are positioned as significant contenders in advancing electrocatalytic technologies. This article provides a comprehensive review of the research progress of two-dimensional TMDs in the field of electrocatalytic water splitting. Based on their fundamental properties and the principles of electrocatalysis, strategies to enhance their electrocatalytic performance through layer control, doping, and interface engineering are discussed in detail. Specifically, this review delves into the basic structure, properties, reaction mechanisms, and measures to improve the catalytic performance of TMDs in electrocatalytic water splitting, including the creation of more active sites, doping, phase engineering, and the construction of heterojunctions. Research in these areas can provide a deeper understanding and guidance for the application of TMDs in the field of electrocatalytic water splitting, thereby promoting the development of related technologies and contributing to the solution of energy and environmental problems. TMDs hold great potential in electrocatalytic water splitting, and future research needs to further explore their catalytic mechanisms, develop new TMD materials, and optimize the performance of catalysts to achieve more efficient and sustainable energy conversion. Additionally, it is crucial to investigate the stability and durability of TMD catalysts during long-term reactions and to develop strategies to improve their longevity. Interdisciplinary cooperation will also bring new opportunities for TMD research, integrating the advantages of different fields to achieve the transition from basic research to practical application.

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Rhombohedrally stacked layered transition metal dichalcogenides and their electrocatalytic applications

Abstract: Layered transition metal dichalcogenides (TMDCs) are extensively investigated as catalyst materials for wide range of electrochemical applications due to their high surface area, versatile electronic and chemical properties. Bulk TMDCs...

Cited by 2 publications

References 132 publications

Non-Precious Tetra-(4-methylthiazole)-carboxamide Cobalt(II) Phthalocyanine Supported on Functionalized Carbon Nanotubes as an Efficient Electrocatalyst for a Hydrogen Evolution Reaction

Non-Precious Tetra-(4-methylthiazole)-carboxamide Cobalt(II) Phthalocyanine Supported on Functionalized Carbon Nanotubes as an Efficient Electrocatalyst for a Hydrogen Evolution Reaction

Transition Metal Dichalcogenides in Electrocatalytic Water Splitting

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