MOF-derived PdNiCo alloys encapsulated in nitrogen-doped graphene for robust hydrogen evolution reactions

Xu, Shihao; Yang, Fan; Han, Shuai; Zhang, Shudong; Wang, Qiang; Jiang, Changlong

doi:10.1039/d0ce01030h

Cited by 11 publications

(6 citation statements)

References 47 publications

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“…To elucidate the reaction kinetics, Tafel plots derived from the LSV curves were performed (Figure 8b). The electrode of 1 wt% Fe 3 O 4 /CNS possesses a far lower Tafel slope of 76.4 mV dec −1 in comparison with the counterparts larger than 130 mV dec −1 , indicating the catalytic kinetics of an HER should be guided by the Volmer-Heyrovsky mechanistic pathway with the Heyrovsky step determined as the rate-determining step [23]. To obtain deeper insight into the HER catalytic activity of the above electrode, we examined the electrode kinetics using electrochemical impedance spectroscopy (EIS).…”

Section: Resultsmentioning

confidence: 98%

Laser Shock Fabrication of Nitrogen Doped Inverse Spinel Fe3O4/Carbon Nanosheet Film Electrodes towards Hydrogen Evolution Reactions in Alkaline Media

Zhao

Cheng

et al. 2022

IJMS

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The reliable and cost-effective production of high-performance film electrodes for hydrogen evolution reactions remains a challenge for the laser surface modification community. In this study, prior to a thermal imidization reaction, a small number of Fe3O4 nanoparticles were vortexed into a poly(amic acid) (PAA) prepolymer, and the achieved flat composite film was then ablated by a 1064 nm fiber laser. After laser irradiation, the hierarchical architectures of carbon nanosheets decorated with Fe3O4 nanoparticles were generated. Although pure polyimide (PI) film and laser carbonized PI film, as well as bare Fe3O4, showcase poor intrinsic catalytic activity toward alkaline hydrogen evolution reactions, our laser-derived Fe3O4/carbon nanosheet hybrid film demonstrated enhanced electrocatalytic activity and stability in 1 M KOH electrolyte; the overpotential(η10) reached 247 mV when the current density was 10 mA cm−2 with a slight current decay in the chronoamperometric examination of 12 h. Finally, we proposed that the substitution of N to O in Fe−O sites of trans spinel structured magnetite would be able to modulate the free energy of hydrogen adsorption (ΔGH*) and accelerate water dissociation.

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Section: Resultsmentioning

confidence: 98%

Laser Shock Fabrication of Nitrogen Doped Inverse Spinel Fe3O4/Carbon Nanosheet Film Electrodes towards Hydrogen Evolution Reactions in Alkaline Media

Zhao

Cheng

et al. 2022

IJMS

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“…Three different approaches to the design of MOF-based HER catalysts have been explored: (1) mimicking the active sites of natural HER catalysts, (2) optimizing the precious metal loading in MOF-derived composites, and (3) fabricating MOF-derived catalysts based on inexpensive and earth-abundant components . Strategies of the second type have been implemented using a wide variety of precious metal-containing MOF/graphene hybrids, and systems containing Pt, Pd, , and Ru have all shown good activity in the HER. Strategies of the third kind make use of materials containing nonprecious metals, particularly Ni, Fe, Cu, Mo, and Co, as low-cost HER catalysts.…”

Section: Applicationsmentioning

confidence: 99%

Graphene-Based Metal–Organic Framework Hybrids for Applications in Catalysis, Environmental, and Energy Technologies

et al. 2022

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Current energy and environmental challenges demand the development and design of multifunctional porous materials with tunable properties for catalysis, water purification, and energy conversion and storage. Because of their amenability to de novo reticular chemistry, metal–organic frameworks (MOFs) have become key materials in this area. However, their usefulness is often limited by low chemical stability, conductivity and inappropriate pore sizes. Conductive two-dimensional (2D) materials with robust structural skeletons and/or functionalized surfaces can form stabilizing interactions with MOF components, enabling the fabrication of MOF nanocomposites with tunable pore characteristics. Graphene and its functional derivatives are the largest class of 2D materials and possess remarkable compositional versatility, structural diversity, and controllable surface chemistry. Here, we critically review current knowledge concerning the growth, structure, and properties of graphene derivatives, MOFs, and their graphene@MOF composites as well as the associated structure–property–performance relationships. Synthetic strategies for preparing graphene@MOF composites and tuning their properties are also comprehensively reviewed together with their applications in gas storage/separation, water purification, catalysis (organo-, electro-, and photocatalysis), and electrochemical energy storage and conversion. Current challenges in the development of graphene@MOF hybrids and their practical applications are addressed, revealing areas for future investigation. We hope that this review will inspire further exploration of new graphene@MOF hybrids for energy, electronic, biomedical, and photocatalysis applications as well as studies on previously unreported properties of known hybrids to reveal potential “diamonds in the rough”.

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“…Metal–organic frameworks (MOFs) can be directly annealed to prepare a rich variety of alloy particles loaded with carbon materials. 39,40 In MOF, multifarious transition metal nodes are present, such as Fe, Co, Ni, and Zn, with linker groups of 2-MeIM, 41 CN, 42 H 3 BTC, 43 POM, 35 etc . During annealing in an inert atmosphere, the metal atoms in MOF are reduced to metal by C in the linker and aggregate to form alloy nanoparticles under the action of surface energy.…”

Section: Preparation Of the Alloymentioning

confidence: 99%

Progress in electrocatalytic hydrogen evolution of transition metal alloys: synthesis, structure, and mechanism analysis

et al. 2023

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MOF-derived PdNiCo alloys encapsulated in nitrogen-doped graphene for robust hydrogen evolution reactions

Abstract: The hydrogen evolution reaction (HER) is an important step for electrochemical water splitting to produce hydrogen. Functional materials with low cost and robust performance might meet the urgent need of...

Cited by 11 publications

References 47 publications

Laser Shock Fabrication of Nitrogen Doped Inverse Spinel Fe3O4/Carbon Nanosheet Film Electrodes towards Hydrogen Evolution Reactions in Alkaline Media

Laser Shock Fabrication of Nitrogen Doped Inverse Spinel Fe3O4/Carbon Nanosheet Film Electrodes towards Hydrogen Evolution Reactions in Alkaline Media

Graphene-Based Metal–Organic Framework Hybrids for Applications in Catalysis, Environmental, and Energy Technologies

Progress in electrocatalytic hydrogen evolution of transition metal alloys: synthesis, structure, and mechanism analysis

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