Transition metal carbides coupled with nitrogen-doped carbon as efficient and stable Bi-functional catalysts for oxygen reduction reaction and hydrogen evolution reaction

The growth of stable and efficient catalysts is vital for the electrochemical hydrogen evolution reaction (HER). Metal–organic frameworks (MOFs) have been recognized as ideal templates for fabricating efficient nanomaterial-based electrocatalysts for the HER. In this study, nitrogen-containing Co-MOF (ZIF-67), Co-MOF-74, and cobalt chloride salt were selenized to create various cobalt-selenide-based materials, i.e., cobalt selenide@nitrogen-doped carbon (CoSe2@NC), CoSe2@C, and CoSe2, respectively. The core–shell structure of CoSe2@NC originated from ZIF-67 exhibited better HER catalytic activity than those of CoSe2@C and CoSe2. CoSe2@NC exhibited a low overvoltage of 184 mV at 10 mA cm−2 and a small Tafel slope of 58.4 mV dec−1. In addition, this catalyst exhibited excellent durability while maintaining its performance after 12 h of testing. The high catalytic activity is ascribed to the integrated effect of the core–shell architecture, N-doped carbon, and large surface area, making protected active sites, high conductivity, and exposed active sites possible. The results demonstrate the efficiency of using MOFs as precursors for cobalt selenide fabrication and provide a potential synthetic strategy for noble-metal-free electrocatalysts for hydrogen production.

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“…A high-magnification XPS spectrum of C 1s is shown in Figure 5(d). Peaks at 286.3, 285.5, and 284.3 eV are attributed to N-C, -N=C, and C-C [49].…”

Section: Resultsmentioning

confidence: 99%

Comparative Study on Hydrogen Evolution Reaction of Various Cobalt-Selenide-Based Electrocatalysts

Huu

Cho

et al. 2023

International Journal of Energy Research

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“…Transition metal carbides (TMCs) demonstrate Pt-like properties for HER electrocatalytic activity due to the shift in the d-band center; for this reason, the development of these electrocatalysts as non-noble metal-based electrocatalysts is of great interest . Group IVb–VIb TMCs are known as transition carbides due to the electronic properties of carbon atoms occupying the metal lattice’s position . W and Mo are the most common candidates for use in TMCs, which in addition to high electrical conductivity, hydrogen adsorption properties, and d-band electron density state, create the optimal compound that can demonstrate near-Pt electrocatalytic activity for HER electrocatalysis .…”

Section: Her Electrocatalystsmentioning

confidence: 99%

Metal Electrocatalysts for Hydrogen Production in Water Splitting

Kazemi,

Manteghi,

Tehrani

2024

ACS Omega

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The rising demand for fossil fuels and the resulting pollution have raised environmental concerns about energy production. Undoubtedly, hydrogen is the best candidate for producing clean and sustainable energy now and in the future. Water splitting is a promising and efficient process for hydrogen production, where catalysts play a key role in the hydrogen evolution reaction (HER). HER electrocatalysis can be well performed by Pt with a low overpotential close to zero and a Tafel slope of about 30 mV dec −1 . However, the main challenge in expanding the hydrogen production process is using efficient and inexpensive catalysts. Due to electrocatalytic activity and electrochemical stability, transition metal compounds are the best options for HER electrocatalysts. This study will focus on analyzing the current situation and recent advances in the design and development of nanostructured electrocatalysts for noble and non-noble metals in HER electrocatalysis. In general, strategies including doping, crystallization control, structural engineering, carbon nanomaterials, and increasing active sites by changing morphology are helpful to improve HER performance. Finally, the challenges and future perspectives in designing functional and stable electrocatalysts for HER in efficient hydrogen production from water-splitting electrolysis will be described.

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“…TMCs/NC exhibit excellent ORR performance in acidic electrolytes. 17 There is also a two-step design method, which involves nano-confinement of magnetite and hematite in a layered nitrogen doped graphene framework. This scheme has been successfully applied to nano-constrained magnetite (γ-Fe 2 O 3 ) in nitrogen doped graphene frameworks.…”

Section: Catalysis Science and Technology Reviewmentioning

confidence: 99%

A review of research progress and prospects of modified two-dimensional catalysts based on black phosphorus in the oxygen reduction reaction

He,

Wei,

Wang

et al. 2024

Catal. Sci. Technol.

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Transition metal carbides coupled with nitrogen-doped carbon as efficient and stable Bi-functional catalysts for oxygen reduction reaction and hydrogen evolution reaction

Cited by 35 publications

References 65 publications

Comparative Study on Hydrogen Evolution Reaction of Various Cobalt-Selenide-Based Electrocatalysts

Comparative Study on Hydrogen Evolution Reaction of Various Cobalt-Selenide-Based Electrocatalysts

Metal Electrocatalysts for Hydrogen Production in Water Splitting

A review of research progress and prospects of modified two-dimensional catalysts based on black phosphorus in the oxygen reduction reaction

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