Engineering the abundant heterointerfaces of integrated bimetallic sulfide-coupled 2D MOF-derived mesoporous CoS2 nanoarray hybrids for electrocatalytic water splitting

Chhetri, Kisan; Muthurasu, Alagan; Dahal, Bipeen; Kim, Hee Young; Mukhiya, Tanka; Chae, Su-Hyeong; Ko, Tae Hoon; Choi, Yejung

doi:10.1016/j.mtnano.2021.100146

Cited by 80 publications

(50 citation statements)

References 67 publications

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“…The types of N and possible chemical states of N, C, and O are perfectly matched with many standard references. [ 19,20 ] The existence of strong C═C, C═N, O═CO, and C═O bonds and the presence of pyridinic, pyrrolic, graphitic, and oxidized nitrogen confirm the graphitization on CNT@HCNF‐1.5 and nitrogen doping in N‐CNTs. Similarly, the existence of CoO bonds provides proof for the distribution of Co‐NPs in the as‐prepared samples.…”

Section: Resultsmentioning

confidence: 91%

Homogeneous Elongation of N‐Doped CNTs over Nano‐Fibrillated Hollow‐Carbon‐Nanofiber: Mass and Charge Balance in Asymmetric Supercapacitors Is No Longer Problematic

et al. 2022

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The hurdle of fabricating asymmetric supercapacitor (ASC) devices using a faradic cathode and a double layer anode is challenging due to the required large amount of active mass of anodic material compared to that of the cathodic material during mass balancing due to the large difference in capacitance values of the two electrodes. Here, the problem is addressed by engineering a negative electrode that furnishes an ultrahigh capacitance. An in situ developed metal-organic framework (MOF)-based thermal treatment is adopted to grow highly porous N-doped carbon nanotubes (CNTs) containing submerged Co nanoparticles over nano-fibrillated electrospun hollow carbon nanofibers (HCNFs).

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Section: Resultsmentioning

confidence: 91%

Homogeneous Elongation of N‐Doped CNTs over Nano‐Fibrillated Hollow‐Carbon‐Nanofiber: Mass and Charge Balance in Asymmetric Supercapacitors Is No Longer Problematic

et al. 2022

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“…Finally, the ultra-high OER activity and durability of Ni 5 P 4 /Ni 2 P–FeNi@C can be attributed to the following causes: (1) the in situ formation of NaCl and NaHCO 3 synergistically regulate the pyrolysis process of alkali metal salts and chitosan carbonaceous material [ 40 ]. As a result, the phosphatized product of Ni 5 P 4 /Ni 2 P–FeNi@C encapsulates the Ni 5 P 4 /Ni 2 P heterojunction and FeNi alloy hybrid into a 3D hierarchical porous graphitic carbon framework [ 41 ], which not only provides more active sites and facilitates electron/mass transfer [ 42 ], but also supplies a graphitic carbon protective layer to reduce the corrosion of alloy particles [ 43 ]. (2) Both the NiOOH active layer reconstructed on the surface of Ni 5 P 4 /Ni 2 P and the original FeNi alloy synergistically contribute to the real catalytic active sites.…”

Section: Resultsmentioning

confidence: 99%

The Scalable Solid-State Synthesis of a Ni5P4/Ni2P–FeNi Alloy Encapsulated into a Hierarchical Porous Carbon Framework for Efficient Oxygen Evolution Reactions

Tian

Jian

et al. 2022

Nanomaterials

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The exploration of high-performance and low-cost electrocatalysts towards the oxygen evolution reaction (OER) is essential for large-scale water/seawater splitting. Herein, we develop a strategy involving the in situ generation of a template and pore-former to encapsulate a Ni5P4/Ni2P heterojunction and dispersive FeNi alloy hybrid particles into a three-dimensional hierarchical porous graphitic carbon framework (labeled as Ni5P4/Ni2P–FeNi@C) via a room-temperature solid-state grinding and sodium-carbonate-assisted pyrolysis method. The synergistic effect of the components and the architecture provides a large surface area with a sufficient number of active sites and a hierarchical porous pathway for efficient electron transfer and mass diffusion. Furthermore, a graphitic carbon coating layer restrains the corrosion of alloy particles to boost the long-term durability of the catalyst. Consequently, the Ni5P4/Ni2P–FeNi@C catalyst exhibits extraordinary OER activity with a low overpotential of 242 mV (10 mA cm−2), outperforming the commercial RuO2 catalyst in 1 M KOH. Meanwhile, a scale-up of the Ni5P4/Ni2P–FeNi@C catalyst created by a ball-milling method displays a similar level of activity to the above grinding method. In 1 M KOH + seawater electrolyte, Ni5P4/Ni2P–FeNi@C also displays excellent stability; it can continuously operate for 160 h with a negligible potential increase of 2 mV. This work may provide a new avenue for facile mass production of an efficient electrocatalyst for water/seawater splitting and diverse other applications.

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“…These simple one-step synthesis methods promote the application of core-shell nanostructured noble metal-based ORR catalysts in industrial production. (2) The effect of temperature on the activity of ORR catalysts concerns two main areas. Firstly, the ORR activity and stability of the catalyst are different at different test temperatures.…”

Section: Conclusion and Prospectivementioning

confidence: 99%

“…With the development and progress of science and technology, the exploitation and utilization of fossil fuels has reached its peak [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. However, fossil fuel is a kind of non-renewable energy.…”

Section: Introductionmentioning

confidence: 99%

Noble Metal-Based Catalysts with Core-Shell Structure for Oxygen Reduction Reaction: Progress and Prospective

Wang

Qin

et al. 2022

Nanomaterials

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With the deterioration of the ecological environment and the depletion of fossil energy, fuel cells, representing a new generation of clean energy, have received widespread attention. This review summarized recent progress in noble metal-based core–shell catalysts for oxygen reduction reactions (ORRs) in proton exchange membrane fuel cells (PEMFCs). The novel testing methods, performance evaluation parameters and research methods of ORR were briefly introduced. The effects of the preparation method, temperature, kinds of doping elements and the number of shell layers on the ORR performances of noble metal-based core–shell catalysts were highlighted. The difficulties of mass production and the high cost of noble metal-based core–shell nanostructured ORR catalysts were also summarized. Thus, in order to promote the commercialization of noble metal-based core–shell catalysts, research directions and prospects on the further development of high performance ORR catalysts with simple synthesis and low cost are presented.

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Engineering the abundant heterointerfaces of integrated bimetallic sulfide-coupled 2D MOF-derived mesoporous CoS2 nanoarray hybrids for electrocatalytic water splitting

Cited by 80 publications

References 67 publications

Homogeneous Elongation of N‐Doped CNTs over Nano‐Fibrillated Hollow‐Carbon‐Nanofiber: Mass and Charge Balance in Asymmetric Supercapacitors Is No Longer Problematic

Homogeneous Elongation of N‐Doped CNTs over Nano‐Fibrillated Hollow‐Carbon‐Nanofiber: Mass and Charge Balance in Asymmetric Supercapacitors Is No Longer Problematic

The Scalable Solid-State Synthesis of a Ni5P4/Ni2P–FeNi Alloy Encapsulated into a Hierarchical Porous Carbon Framework for Efficient Oxygen Evolution Reactions

Noble Metal-Based Catalysts with Core-Shell Structure for Oxygen Reduction Reaction: Progress and Prospective

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