Nickel sulfide-oxide heterostructured electrocatalysts: Bi-functionality for overall water splitting and in-situ reconstruction

Huang, Zinan; He, Liuqing; Zhang, Wenbiao; Huang, Wenjie; Mo, Qijie; Yang, Lichun; Fu, Qiang; Gao, Qingsheng

doi:10.1016/j.jcis.2022.04.150

Cited by 33 publications

(17 citation statements)

References 58 publications

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“…At the OCP condition, the appearance of Ni II ‐OH vibration at 475 cm −1 suggested the generation of Ni(OH) 2 at the surface of Au@NiS x . This observation was in agreement with the findings from Huang et al., [ 82 ] in which the conversion from Ni 3 S 2 to Ni(OH) 2 during HER under alkaline conditions has been validated by theoretical simulation and in situ Raman analysis. Interestingly, as the HER proceeded, the Ni II ‐OH vibration band gradually vanished, indicating the further composition transformation from Ni 2+ to metallic Ni under such cathodic conditions.…”

Section: Resultssupporting

confidence: 93%

Au@NiS_x Yolk@Shell Nanostructures as Dual‐Functional Electrocatalysts for Concomitant Production of Value‐Added Tartronic Acid and Hydrogen Fuel

Tran

Chiang

et al. 2022

Adv Funct Materials

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Efficient glycerol electrooxidation reaction (GEOR) over gold@nickel sulfide (Au@NiSx) yolk@shell nanostructures is demonstrated, achieving ≈50.4% glycerol conversion at 10 h, 92.6% selectivity toward three‐carbon products, and 90.7% total Faradaic efficiency. By regulating the electrode potential, tartronic acid (TART), one of the highest value‐added intermediates, can be produced with a selectivity as high as 43.1% and a yield of 45.6 µmol cm−2 h−1. A combination of ex situ microstructural analysis, operando Raman, and operando X‐ray absorption measurements reveals a dynamic surface reconstruction course from Au@NiSx to Au@NiSx/NiOOH during the glycerol oxidation process. The unique reconstructed architectures featuring conductive interior NiSx components and active surface high‐valence Ni3+ species account for the superior GEOR performance. Further integration of GEOR with hydrogen evolution reaction is realized by employing Au@NiSx as both anode and cathode electrocatalysts in a two‐electrode configuration. Concomitantly production of TART and hydrogen fuel is accomplished. This study demonstrates that Au@NiSx not only can convert glycerol to TART with remarkable efficiency and selectivity, but also can produce hydrogen at a moderate level. The findings from this study can facilitate the development of dual‐functional electrocatalysts capable of producing high‐value products at both the cathode and anode sides.

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Section: Resultssupporting

confidence: 93%

Au@NiS_x Yolk@Shell Nanostructures as Dual‐Functional Electrocatalysts for Concomitant Production of Value‐Added Tartronic Acid and Hydrogen Fuel

Tran

Chiang

et al. 2022

Adv Funct Materials

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“…The high-resolution Ni 2p spectrum of Ni 3 S 2 /NF (Figure b) displays two main peaks of 873.90 and 856.10 eV, which belong to Ni 2p 1/2 and Ni 2p 3/2 . Alongside are the corresponding satellite peaks (879.80 and 861.50 eV) . In addition, the two peaks present at 870.50 and 853.15 eV belong to Ni 0 since we use NF as the substrate .…”

Section: Resultsmentioning

confidence: 99%

Mo-Doped Ni₃S₂ Nanosheet Arrays for Overall Water Splitting

Gao

Cao

et al. 2023

ACS Appl. Nano Mater.

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Designing effective and low-cost bifunctional electrocatalysts for the alkaline hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is essential to achieve green development of the hydrogen economy. Herein, we have developed Mo-doped Ni3S2 nanosheet array catalysts with excellent electrochemical properties. Only 85 mV (HER) and 230 mV (OER) overpotentials are required under alkaline conditions at 10 mA cm–2 and remain undegraded for 100 h. In addition, it only required 1.52 V at 10 mA cm–2 in an alkaline electrolyzer, and it remained unchanged for more than 100 h in stability tests, outperforming most reported electrocatalysts. Experiments and density functional theory (DFT) calculations confirmed that the doping of Mo could expose more active sites of Ni3S2 and optimize the adsorption free energy of the intermediate, which in turn improves its intrinsic activity. This work reveals the key role of Mo in Ni3S2 electrocatalytic performance enhancement at the atomic scale.

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“…On the other hand, a comparatively smaller cohesive energy of Cu (336 kJ mol −1 ), in comparison with that of Pt (546 kJ mol −1 ), indicated the much easier surface‐atom mobility when the surface strongly adsorbed reaction intermediates [52] . Therefore, particular attentions should be paid onto the dynamic evolution and the corresponding control of the surface roughness of Cu electrodes in future research [53] …”

Section: Resultsmentioning

confidence: 99%

“…[52] Therefore, particular attentions should be paid onto the dynamic evolution and the corresponding control of the surface roughness of Cu electrodes in future research. [53] In a further set of experiments, the scope of this reductive coupling process was investigated. We examined the efficacy of p-Cu and r-CuÀ I electrodes because they have demonstrated the best performance for nitrones and imines, respectively.…”

Section: Chemsuschemmentioning

confidence: 99%

Roughness‐Dependent Electro‐Reductive Coupling of Nitrobenzenes and Aldehydes on Copper Electrodes

et al. 2023

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The electro-reductive coupling of nitro and carbonyl compounds enables a facile, environmentally friendly and energy benign transformation toward value-added nitrones or imines, but the selectivity is still challenging. Here, the surface roughness of Cu electrodes is introduced for the first time as the determinant to switch products from nitrones to imines owing to the controllable reduction of nitroarenes to hydroxylamines or amines on tailored Cu I /Cu 0 interfaces. The roughnessdependent selectivity, that is the decrease of nitrones and the increase of imines with enhanced roughness, is visible in the electro-reductive coupling of nitrobenzene and furfural. Thus, the high selectivity of nitrone (98 %) and imine (80 %) can be achieved on a surface smooth Cu foil and the one electrochemically roughened in the presence of I À , respectively. Such roughness-dependence of nitrone/imine selectivity on Cu electrodes is further verified in a wide substrate scope, highlighting the promise of surface/interfacial engineering for electrochemical synthesis.

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Nickel sulfide-oxide heterostructured electrocatalysts: Bi-functionality for overall water splitting and in-situ reconstruction

Cited by 33 publications

References 58 publications

Au@NiS_x Yolk@Shell Nanostructures as Dual‐Functional Electrocatalysts for Concomitant Production of Value‐Added Tartronic Acid and Hydrogen Fuel

Au@NiS_x Yolk@Shell Nanostructures as Dual‐Functional Electrocatalysts for Concomitant Production of Value‐Added Tartronic Acid and Hydrogen Fuel

Mo-Doped Ni₃S₂ Nanosheet Arrays for Overall Water Splitting

Roughness‐Dependent Electro‐Reductive Coupling of Nitrobenzenes and Aldehydes on Copper Electrodes

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Nickel sulfide-oxide heterostructured electrocatalysts: Bi-functionality for overall water splitting and in-situ reconstruction

Cited by 33 publications

References 58 publications

Au@NiSx Yolk@Shell Nanostructures as Dual‐Functional Electrocatalysts for Concomitant Production of Value‐Added Tartronic Acid and Hydrogen Fuel

Au@NiSx Yolk@Shell Nanostructures as Dual‐Functional Electrocatalysts for Concomitant Production of Value‐Added Tartronic Acid and Hydrogen Fuel

Mo-Doped Ni3S2 Nanosheet Arrays for Overall Water Splitting

Roughness‐Dependent Electro‐Reductive Coupling of Nitrobenzenes and Aldehydes on Copper Electrodes

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Product

Resources

About

Au@NiS_x Yolk@Shell Nanostructures as Dual‐Functional Electrocatalysts for Concomitant Production of Value‐Added Tartronic Acid and Hydrogen Fuel

Au@NiS_x Yolk@Shell Nanostructures as Dual‐Functional Electrocatalysts for Concomitant Production of Value‐Added Tartronic Acid and Hydrogen Fuel

Mo-Doped Ni₃S₂ Nanosheet Arrays for Overall Water Splitting