High current density electrodeposition of NiFe/Nickel Foam as a bifunctional electrocatalyst for overall water splitting in alkaline electrolyte

Lian, Jiqiong; Wu, Yingquan; Sun, Jingjing

doi:10.1007/s10853-020-05080-w

Cited by 38 publications

(10 citation statements)

References 38 publications

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“…4 a, for FeNiZn/FeNi 3 @NiFe-24 h sample the peaks with the binding energy at 852.52 and 868.54 eV can be ascribed to the metallic Ni. The slight negative shift compared with the pure Ni suggests that the metallic Ni comes from the FeNiZn alloy and FeNi 3 intermetallic [ 37 , 38 ]. Moreover, the two peaks around 856.13 and 873.88 eV with the satellite peaks can be attributed to the Ni 2+ species accompanied with the coexistence of Ni 3+ corresponding to the fitted peaks around 858.05 and 876.15 eV [ 26 , 39 ].…”

Section: Resultsmentioning

confidence: 99%

Duplex Interpenetrating-Phase FeNiZn and FeNi3 Heterostructure with Low-Gibbs Free Energy Interface Coupling for Highly Efficient Overall Water Splitting

Zhou

Hou

et al. 2023

Nano-Micro Lett.

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The sluggish kinetics of both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) generate the large overpotential in water electrolysis and thus high-cost hydrogen production. Here, multidimensional nanoporous interpenetrating-phase FeNiZn alloy and FeNi3 intermetallic heterostructure is in situ constructed on NiFe foam (FeNiZn/FeNi3@NiFe) by dealloying protocol. Coupling with the eminent synergism among specific constituents and the highly efficient mass transport from integrated porous backbone, FeNiZn/FeNi3@NiFe depicts exceptional bifunctional activities for water splitting with extremely low overpotentials toward OER and HER (η1000 = 367/245 mV) as well as the robust durability during the 400 h testing in alkaline solution. The as-built water electrolyzer with FeNiZn/FeNi3@NiFe as both anode and cathode exhibits record-high performances for sustainable hydrogen output in terms of much lower cell voltage of 1.759 and 1.919 V to deliver the current density of 500 and 1000 mA cm−2 as well long working lives. Density functional theory calculations disclose that the interface interaction between FeNiZn alloy and FeNi3 intermetallic generates the modulated electron structure state and optimized intermediate chemisorption, thus diminishing the energy barriers for hydrogen production in water splitting. With the merits of fine performances, scalable fabrication, and low cost, FeNiZn/FeNi3@NiFe holds prospective application potential as the bifunctional electrocatalyst for water splitting."Image missing"

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Section: Resultsmentioning

confidence: 99%

Duplex Interpenetrating-Phase FeNiZn and FeNi3 Heterostructure with Low-Gibbs Free Energy Interface Coupling for Highly Efficient Overall Water Splitting

Zhou

Hou

et al. 2023

Nano-Micro Lett.

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“…As shown in Figure e and Table S3, the R ct value of CoRu-CrOOH/NF (1.8 Ω) is dramatically lower than those of CrOOH/NF (12.2 Ω), Ru/NF (7.8 Ω), CoRu/NF (4.1 Ω), and Ru-CrOOH/NF (2.9 Ω), indicating that CoRu-CrOOH/NF possesses a fast charge transfer rate during the HER process, which is mainly attributed to the coupling interfaces constructed between CoRu nanoparticles and CrOOH nanosheets. In addition, as-prepared electrocatalysts exhibit a small R s (∼1 Ω), suggesting the high-quality electrical integration of the nickel foam substrate and electrocatalysts. , The turnover frequency (TOF) is a commonly used parameter to evaluate the intrinsic activity of the catalysts, which is calculated by assuming that all sites are participating in the process. The calculated TOF of 0.0219 s –1 for CoRu-CrOOH/NF at the overpotential of 26 mV is obviously higher than those of CoRu/NF (0.0198 s –1 ), Ru-CrOOH/NF (0.0165 s –1 ), Ru/NF (0.0149 s –1 ), and CrOOH/NF (0.0102 s –1 ) (Table S4), which is attributed to the synergistic interaction between unique bimetallic alloy and oxyhydroxide that can regulate the electronic structure and increase the intrinsic properties of the catalyst.…”

Section: Results and Discussionmentioning

confidence: 99%

Synergizing Cobalt Ruthenium Alloy with Chromium Oxyhydroxide for Highly Efficient Electrocatalytic Water Splitting

et al. 2022

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Constructing a coupling interface of multicomponents with different functions is of considerable importance for designing an advanced bifunctional water splitting electrode. Particularly, designing and developing alloy/oxyhydroxide-integrated electrodes have emerged as a tendency yet remain a considerable challenge. In this work, a novel 3D nanostructure electrocatalyst assembled from CoRu nanoalloy and CrOOH nanosheets (denoted as CoRu-CrOOH/NF) was directly grown on nickel foam via a successive hydrothermal method. The unique synergy in CoRu-CrOOH/NF heterostructures is not only conducive to strengthening charge transfer capability and accelerating the reaction kinetics but also favors the redistribution of charge within the interface, thus improving the electrocatalytic performance. In view of the above-mentioned points, the resultant CoRu-CrOOH/NF displays outstanding catalytic performance with overpotentials of 26 and 272 mV at 10 mA cm–2 for hydrogen evolution reaction (HER) and 50 mA cm–2 for oxygen evolution reaction (OER). Remarkably, the symmetrical two-electrode cell using CoRu-CrOOH/NF only acquires 1.47 V at 10 mA cm–2 in 1.0 M KOH, which is superior to many other state-of-the-art overall water-splitting electrocatalysts. This holistic work provides a new insight to designing alloy/oxyhydroxide-integrated electrodes for high-efficiency overall water splitting.

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“…With the ED method, the thickness and composition of the coatings can be controlled, − which is beneficial for optimizing the uniformity of catalyst coatings. Moreover, the ED method has high stability and low requirement on preparation conditions , with no binder for the adhesion of catalyst coatings on the substrates. , However, there are few reports on the preparation of catalyst coatings on metal foam with the ED method and the application for NB hydrogenation in the MPBs to improve reaction efficiency and reduce reaction time. The hydrogenation reaction with fast intrinsic kinetics is often controlled by mass transfer.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Highly Effective Ni Foam Monolithic Catalysts by Electrolytic Deposition for Nitrobenzene Hydrogenation in a Micropacked Bed

Liu

Duan

et al. 2022

Ind. Eng. Chem. Res.

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An electrolytic deposition (ED) method is proposed to fabricate monolithic catalysts and applied for nitrobenzene (NB) hydrogenation in a micropacked bed (MPB). In contrast to the particle catalysts and monolithic catalysts with a suspension circulation (SC) method, the monolithic catalysts with the ED method have better uniformity for coatings and the active component. The investigation of overall external mass transfer performance reveals that the hydrogenation in MPBs with monolithic catalysts is significantly affected by external mass transfer. The catalysts with the ED method demonstrate high activity, selectivity, and stability in NB hydrogenation, and the activity is higher than that of particle catalysts and catalysts with the SC method. This ED method is universal and applicable for a variety of coatings, including Al2O3, SiO2, CeO2, and TiO2, and can provide more efficient monolithic catalysts for improving the hydrogenation performance in MPBs.

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High current density electrodeposition of NiFe/Nickel Foam as a bifunctional electrocatalyst for overall water splitting in alkaline electrolyte

Cited by 38 publications

References 38 publications

Duplex Interpenetrating-Phase FeNiZn and FeNi3 Heterostructure with Low-Gibbs Free Energy Interface Coupling for Highly Efficient Overall Water Splitting

Duplex Interpenetrating-Phase FeNiZn and FeNi3 Heterostructure with Low-Gibbs Free Energy Interface Coupling for Highly Efficient Overall Water Splitting

Synergizing Cobalt Ruthenium Alloy with Chromium Oxyhydroxide for Highly Efficient Electrocatalytic Water Splitting

Preparation of Highly Effective Ni Foam Monolithic Catalysts by Electrolytic Deposition for Nitrobenzene Hydrogenation in a Micropacked Bed

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