In-situ constructed Ru-rich porous framework on NiFe-based ribbon for enhanced oxygen evolution reaction in alkaline solution

Xi, Guoguo; Zuo, Lei; Li, Xuan; Yu, Jin; Li, Ran; Zhang, Tao

doi:10.1016/j.jmst.2020.08.039

Cited by 27 publications

(9 citation statements)

References 48 publications

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“…3a, the lattice fringes of 0.214, 0.233, and 0.203 nm could be ascribed to the (002), (100), and (101) planes of Ru, respectively. 36,37 However, the crystal lattice of MOFs was not observed, proving that the MOF architecture was of an amorphous type (Fig. S5†).…”

Section: Resultsmentioning

confidence: 99%

Multivalent ruthenium immobilized by self-supported NiFe–organic frameworks for efficient electrocatalytic overall water splitting

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Multivalent ruthenium immobilized by self-supported NiFe–organic frameworks for efficient electrocatalytic overall water splitting

et al. 2023

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“…It is surprising that only the NGs form the nanoporous structure, which indicates that the different behavior is related to the heterogeneous microstructure with low-density (high-energy) interface region, as shown in Figure 2g and Figure S7 (Supporting Information). Generally, porous structures promote the close contact between the electrode, catalyst and electrolyte, which ensures the rapid transfer of charge and improve the current of the oxidation reaction, [7,65] thus reducing the overpotential in the UOR. Meanwhile, the porous structure increases the active surface area with high-energy and provides more active sites.…”

Section: Resultsmentioning

confidence: 99%

Nanostructured Metallic Glass in a Highly Upgraded Energy State Contributing to Efficient Catalytic Performance

et al. 2022

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Metallic glasses (MGs), with high density of low coordination sites and high Gibbs free energy state, are novel promising and competitive candidates in the family of electrochemical catalysts. However, it remains a grand challenge to modify the properties of MGs by control of the disordered atomic structure. Recently, nanostructured metallic glasses (NGs), consisting of amorphous nanometer‐sized grains connected by amorphous interfaces, have been reported to exhibit tunable properties compared to the MGs with identical chemical composition. Here, it is demonstrated that electrodeposited Ni–P NG is characterized by an extremely high energy state due to its heterogeneous structure, which significantly promotes the catalytic performance. Moreover, the Ni–P NG with a heterogeneous structure is a perfect precursor for the fabrication of unique honey‐like nanoporous structure, which displays superior catalytic performance in the urea oxidation reaction (UOR). Specifically, modified Ni–P NG requires a potential of mere 1.36 V at 10 mA cm–2, with a Tafel slope of 13 mV dec–1, which is the best UOR performance in Ni‐based alloys. The present work demonstrates that the nanostructurization of MGs provides a universal and effective pathway to upgrade the energy state of MGs for the design of high‐performance catalysts in energy conversion.

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“…A Ru‐rich porous framework on NiFe‐based ribbons with amorphous‐nanocrystalline was prepared by a melt‐spinning method. [ 390 ] A Ru‐doped NiFe‐based catalyst with a nanoporous surface (NP‐Ru x ) exhibited an excellent OER activity, with an ultralow overpotential of ≈245 mV at 10 mA cm −2 and a small Tafel slope of ≈15 mV dec −1 and low charge‐transfer resistance under 1.0 m KOH. The enhanced performance may be due to the Ru‐rich nanoporous architecture; it can provide a large number of active sites and facilitate mass transfer across the electrode/electrolyte interface.…”

Section: Hydrogen Evolution (Her) and Oxygen Evolution Reactions (Oer...mentioning

confidence: 99%

Developments and Perspectives on Robust Nano‐ and Microstructured Binder‐Free Electrodes for Bifunctional Water Electrolysis and Beyond

Chandrasekaran

Khandelwal

Fan

et al. 2022

Advanced Energy Materials

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Ni, Fe, and Cu foams to form robust binder-free electrodes for high-performance electrocatalytic reactions. [55][56][57][58][59] Interestingly, multidimensional electrocatalysts grown at the nanoscale on a range of current collectors, namely substrates and will benefit from a strong adhesion with the current collector to avoid catalyst delamination, limited active sites, and charge transfer blockage to enhance catalytic reactions (Figure 1b-d). [9,[60][61][62][63][64] Key Prospects, Insights, and the Dynamic Properties of Nano-and Microstructured Binder-Free Electrocatalysts and Their Direct Impact on Electrochemical ReactionsWater splitting has become one of the most important technologies to produce hydrogen (H 2 ) in high purity form. Water splitting includes two half-reactions, namely the cathodic HER and anodic OER. [8,65] Generally, the electrocatalytic performance and activity are highly sensitive to local reaction conditions and is largely valued by the energy required for adsorption/desorption of reaction intermediates and the rupture/creation of chemical bonds. Hence, the conventional powder form of precious metals such as Pt/C for the HER and RuO 2 or IrO 2 for the OER are considered ideal electrocatalysts. [66] In addition, several nonprecious 1D, 2D, and 3D nano-and microstructured powder catalysts such as MoS 2 , WS 2 , Ni 3 S 2 , NiCo 2 S 4 are also of interest for the HER and OER reactions. [54,[67][68][69][70][71][72][73][74] However, for commercial purposes and practical applica-

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In-situ constructed Ru-rich porous framework on NiFe-based ribbon for enhanced oxygen evolution reaction in alkaline solution

Cited by 27 publications

References 48 publications

Multivalent ruthenium immobilized by self-supported NiFe–organic frameworks for efficient electrocatalytic overall water splitting

Multivalent ruthenium immobilized by self-supported NiFe–organic frameworks for efficient electrocatalytic overall water splitting

Nanostructured Metallic Glass in a Highly Upgraded Energy State Contributing to Efficient Catalytic Performance

Developments and Perspectives on Robust Nano‐ and Microstructured Binder‐Free Electrodes for Bifunctional Water Electrolysis and Beyond

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