Self-assembled CuCo2S4 nanosheets with rich surface Co3+ as efficient electrocatalysts for oxygen evolution reaction

Hao, Zewei; Wei, Pengkun; Yang, Yang; Sun, Jingyu; Song, Yunhua; Guo, Donggang; Liu, Lu

doi:10.1016/j.apsusc.2020.147826

Cited by 42 publications

(19 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…R S means the resistance of the electrolyte; R CT means the resistance of charge transfer between the electrolyte and the electrode. R OER means the resistance of OER from the ease of formation of reaction intermediates. , Table summarizes the fitting values of the EIS results. Because the OER performance will be influenced by the reaction kinetics, R CT plus R OER is calculated for comparison.…”

Section: Resultssupporting

confidence: 88%

See 1 more Smart Citation

Operando Identification of Hydrangea-like and Amorphous Cobalt Oxyhydroxide Supported by Thin-Layer Copper for Oxygen Evolution Reaction

Chen

Chang

Lee

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

This work demonstrates the unique three-dimensional (3D) layered hydrangea-like structure of amorphous CoOOH, which is deposited on thin-layer copper and nickel foam (CoOOH/Cu/Ni foam), showing the high activity of the oxygen evolution reaction (OER) at an overpotential of 260 mV with a current density of 10 mA cm −2 . The CoOOH/Cu/Ni foam durability test shows almost no decay after 1000 cycles. The cell using the CoOOH/Cu/Ni foam for water electrolysis demonstrates a very stable current density of about 110 mA cm −2 at the cell potential of 1.8 V during 100 h of operation. The operando XAS analysis is carried out to understand the OER mechanism of the CoOOH/Cu/Ni foam. The hydrangea-like and amorphous CoOOH of the CoOOH/Cu/Ni foam shows the potentialdependent deprotonation reaction during the OER, forming a highly active phase. The thin-layer Cu of the CoOOH/Cu/Ni foam increases the conductivity and adsorbs oxygen intermediates after the initial reaction at onset potential to positively affect the OER.

show abstract

Section: Resultssupporting

confidence: 88%

“…R OER means the resistance of OER from the ease of formation of reaction intermediates. 39,40 Table 2 summarizes the fitting values of the EIS results. Because the OER performance will be influenced by the reaction kinetics, R CT plus R OER is calculated for comparison.…”

Section: ■ Results and Discussionsupporting

confidence: 55%

Operando Identification of Hydrangea-like and Amorphous Cobalt Oxyhydroxide Supported by Thin-Layer Copper for Oxygen Evolution Reaction

Chen

Chang

Lee

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…It is widely accepted that the catalytic active centers are metal sites (Cu or Co sites). Previously, Hao et al proposed that in Cu–Co-based sulfides, the cobalt sites are the catalytic active centers for the OER, while copper sites mainly optimized the adsorption state of intermediates including OH, O, and OOH on the cobalt site . Recently, we also studied the electrocatalytic activity of Cu 2 S toward the OER.…”

Section: Resultsmentioning

confidence: 89%

“…Previously, Hao et al proposed that in Cu−Co-based sulfides, the cobalt sites are the catalytic active centers for the OER, while copper sites mainly optimized the adsorption state of intermediates including OH, O, and OOH on the cobalt site. 72 Recently, we also studied the electrocatalytic activity of Cu 2 S toward the OER. A bigger Tafel slope of >120 mV dec −1 was obtained with this copper-based catalyst.…”

Section: Resultsmentioning

confidence: 99%

Molecular Precursor Route to CuCo₂S₄ Nanosheets: A High-Performance Pre-Catalyst for Oxygen Evolution and Its Application in Zn–Air Batteries

Zhang

Cheng

et al. 2021

Inorg. Chem.

View full text Add to dashboard Cite

Development of high-efficiency non-precious metal-based electrocatalysts to drive the complex four-electron process of the oxygen evolution reaction (OER) is crucial for production of hydrogen and energy storage components. Herein, bimetallic CuCo2S4 nanosheets were created by a new molecular precursor route. The optimal CuCo2S4 catalyst demonstrates superior performance to catalyze the OER with excellent stability, which was confirmed by the low overpotential of 290 mV at 10 mA cm–2 in 1 M KOH. The catalytic activity can be maintained for at least 40 h. The catalyst after the OER was then detected. The results indicate that S-doped CoOOH/CuO nanosheets formed on the catalyst surface during the OER may act as the catalytic active substance. Furthermore, when employed as an air cathode in a Zn–air battery, it reveals a high open-cycle potential of 1.38 V and a peak power density of 123.9 mW cm–2. The performance of the rechargeable Zn–air battery is close to that fabricated with commercial precious metal-based electrocatalysts. These findings would furnish some guidelines for the design, development, and applications of bimetallic sulfide electrocatalysts for the OER.

show abstract

“…To date, enormous attempts have been devoted to readying earth-abundant-based electrocatalysts, especially transition metal oxides, − sulfides, ,− carbides, − hydroxides, − phosphides, − selenides, − etc., for more energy proficient water splitting. Among them, transition metal sulfides, so-called thiospinels, provide great advantages to improve electrochemical execution because they can reveal a substantial number of active surface sites, fast electron transfer pathways, and narrow band gaps and enhance redox responses. − Because of a suitable electrical configuration, thiospinels composed of cobalt and copper have indicated extraordinary assurance for superior OER electrocatalysts because cobalt has suitable water affinity compared to that of other metals. Wiltrout et al have synthesized CuCo 2 S 4 nanoparticles in solution, and they reported that these thiospinels showed high OER activity in a basic medium .…”

Section: Introductionmentioning

confidence: 99%

Interfacial Engineering of CuCo₂S₄/g-C₃N₄ Hybrid Nanorods for Efficient Oxygen Evolution Reaction

et al. 2021

View full text Add to dashboard Cite

Altering the morphology of electrochemically active nanostructured materials could fundamentally influence their subsequent catalytic as well as oxygen evolution reaction (OER) performance. Enhanced OER activity for mixed-metal spinel-type sulfide (CuCo2S4) nanorods is generally done by blending the material that has high conductive supports together with those having a high surface volume ratio, for example, graphitic carbon nitrides (g-C3N4). Here, we report a noble-metal-free CuCo2S4 nanorod-based electrocatalyst appropriate for basic OER and neutral media, through a simple one-step thermal decomposition approach from its molecular precursors pyrrolidine dithiocarbamate-copper(II), Cu[PDTC]2, and pyrrolidine dithiocarbamate-cobalt(II), Co[PDTC]2 complexes. Transmission electron microscopy (TEM) images as well as X-ray diffraction (XRD) patterns suggest that as-synthesized CuCo2S4 nanorods are highly crystalline in nature and are connected on the g-C3N4 support. Attenuated total reflectance–Fourier-transform infrared (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy studies affirm the successful formation of bonds that bridge (Co–N/S–C) at the interface of CuCo2S4 nanorods and g-C3N4. The kinetics of the reaction are expedited, as these bridging bonds function as an electron transport chain, empowering OER electrocatalytically under a low overpotential (242 mV) of a current density at 10 mA cm–2 under basic conditions, resulting in very high durability. Moreover, CuCo2S4/g-C3N4 composite nanorods exhibit a high catalytic activity of OER under a neutral medium at an overpotential of 406 mV and a current density of 10 mA cm–2.

show abstract

Self-assembled CuCo2S4 nanosheets with rich surface Co3+ as efficient electrocatalysts for oxygen evolution reaction

Cited by 42 publications

References 45 publications

Operando Identification of Hydrangea-like and Amorphous Cobalt Oxyhydroxide Supported by Thin-Layer Copper for Oxygen Evolution Reaction

Operando Identification of Hydrangea-like and Amorphous Cobalt Oxyhydroxide Supported by Thin-Layer Copper for Oxygen Evolution Reaction

Molecular Precursor Route to CuCo₂S₄ Nanosheets: A High-Performance Pre-Catalyst for Oxygen Evolution and Its Application in Zn–Air Batteries

Interfacial Engineering of CuCo₂S₄/g-C₃N₄ Hybrid Nanorods for Efficient Oxygen Evolution Reaction

Contact Info

Product

Resources

About

Self-assembled CuCo2S4 nanosheets with rich surface Co3+ as efficient electrocatalysts for oxygen evolution reaction

Cited by 42 publications

References 45 publications

Operando Identification of Hydrangea-like and Amorphous Cobalt Oxyhydroxide Supported by Thin-Layer Copper for Oxygen Evolution Reaction

Operando Identification of Hydrangea-like and Amorphous Cobalt Oxyhydroxide Supported by Thin-Layer Copper for Oxygen Evolution Reaction

Molecular Precursor Route to CuCo2S4 Nanosheets: A High-Performance Pre-Catalyst for Oxygen Evolution and Its Application in Zn–Air Batteries

Interfacial Engineering of CuCo2S4/g-C3N4 Hybrid Nanorods for Efficient Oxygen Evolution Reaction

Contact Info

Product

Resources

About

Molecular Precursor Route to CuCo₂S₄ Nanosheets: A High-Performance Pre-Catalyst for Oxygen Evolution and Its Application in Zn–Air Batteries

Interfacial Engineering of CuCo₂S₄/g-C₃N₄ Hybrid Nanorods for Efficient Oxygen Evolution Reaction