Boosted water electrolysis capability of NixCoyP via charge redistribution and surface activation

Liu, Haobo; Li, J.; Zhang, Yuqi; Ge, Riyue; Liu, Ying; Zhang, Jiujun; Li, Sean; Liu, Bin; Dai, Liming; Li, Wenxian

doi:10.1016/j.cej.2023.145397

Cited by 18 publications

(5 citation statements)

References 82 publications

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“…This also enhances the electron transport capacity of the material and improves its electrical conductivity. 45,46 The 0.1CuCo-NC-based ZAB exhibited a peak power density of 198.3 mW cm −2 , a specific capacity of 798.2 mAh g −1 , and a cycling stability of 923 h at room temperature. In situ characterization on three electrodes revealed that the Co-O active sites undergo cyclic changes during the battery's charging and discharging processes.…”

Section: Discussionmentioning

confidence: 99%

Cu Regulating the Bifunctional Activity of Co-O Sites for the High-Performance Rechargeable Zinc-Air Battery

Niu,

Yue,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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The rational design of cost-effective and highly active electrocatalysts becomes the crucial energy storage technology to boost the kinetics of the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER), which hinders the large-scale application of metal-air batteries under the situation of increasingly pressing energy anxiety. Herein, the Co-based ZIF introduced the moderate amount of Cu 2+ -derived Cu/Co metal nanoparticles (NPs) embedded in carbon frameworks after hightemperature calcination. The Co-O bond on the surface of Co nanoparticles is modulated by adjacent Cu nanoparticles with the surface Cu-O bonds. The resulted increase of the Co 2+ /Co 3+ ratio in 0.1CuCo-NC enhances the ORR/OER bifunctional catalytic kinetics along with the ΔE of 0.639 V. In situ Raman spectra of the catalyst on the three-electrode system as well as in the driven zinc-air battery (ZAB) show that the Co-O active sites regulated by Cu nanoparticles with Cu-O bonds maintain a periodic lattice expansion and compression during discharging and charging. The zinc-air battery based on 0.1CuCo-NC has a peak power density of up to 198.3 mW cm −2 , a mass-specific capacity of 798.2 mAh g −1 , and a cycling stability of 923 h at room temperature. This work makes up the research gap of a Co-based metal−organic framework (MOF)-derived catalyst regulated by a transition metal.

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Section: Discussionmentioning

confidence: 99%

Cu Regulating the Bifunctional Activity of Co-O Sites for the High-Performance Rechargeable Zinc-Air Battery

Niu,

Yue,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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“…XPS spectra of Co 2p, Fe 2p, and O 1s after electrolysis are shown in Figure S17a–c, SI. In Co 2p spectra, a slight negative shift was observed, which could be due to the formation of CoOOH during OER (Figure S17a, SI). , The ratio of Co 2+ /Co 3+ decreased after electrolysis, which signifies the generation of Co 3+ during electrolysis (Table S11, SI) . Fe 2p spectra revealed the presence of Fe 3+ in the material after electrolysis (Figure S17b, SI) .…”

Section: Mechanism Of the Cofe-nanomesh Formationmentioning

confidence: 95%

“…In this regard, non-noble metal-based electrocatalysts (Co, Ni, Fe, etc. ), such as transition-metal dichalcogenides, metal oxides, metal hydroxides, etc., have attracted much attention due to their abundance, cost-effectiveness, and sustainability. , Furthermore, transition-metal-based electrocatalysts also provided remarkable stability, such as bifunctional bimetallic phosphide (Ni x Co y P) supported on nickel form (NF), highly active ternary metal (hydro)oxide (NiFeCo), self-supported Mo-doped dual phase phosphide heterostructure on nickel foam (NF), Co-doped TiO 2 brookite phase nanorods, etc . Recently, layered double hydroxides (LDHs) (i.e., tunable metal cations in the two-dimensional (2D) host layers with exchangeable anions and water molecules in the interlayer space) have attracted immense attention due to their morphologies, facile synthesis methodologies, and high electrocatalytic activity for OER. , In the earlier studies, Co-based LDHs demonstrated excellent OER performance; , however, the stability of these materials needs to be improved.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of CoFe-Nanomesh for Oxygen Evolution Reaction

Sharma,

Paul

2024

ACS Appl. Nano Mater.

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Iron-doped cobalt-based nanomeshes have been synthesized in a one-pot methodology. 2-Methyl imidazole (2-HMIM) acted as an etchant, while high valent iron increased the acidity of the solution and helped to synthesize ultrathin (thickness 1.9−2.0 nm) two-dimensional (2D)-nanomeshes having small uniform mesopores (3.8−4.0 nm) on the basal plane with high surface area and high pore volume. 20% iron-doped nanomesh material (Co 0.8 Fe 0.2 (OH) x ) revealed the best water oxidation reactivity, having an overpotential of 314 ± 3 mV, a mass activity of 413 ± 19 A/g, a turnover frequency (TOF) of 1.41 ± 0.04 s −1 , and a TOF EIS of 4.15 ± 0.04 s −1 . Electrochemical results suggested that the Co 0.8 Fe 0.2 (OH) x -nanomesh had a double-layer capacitance of 12.2 mF/cm 2 , corresponding to a roughness factor of 452, i.e., ion accessibility inside the nanomaterial was improved 452 times compared to the geometrical surface area of the electrode. This remarkable reactivity was due to (a) improved active sites for water oxidation at protruding edge sites and narrow mesopores on the basal planes of nanomeshes, (b) narrow mesopores on the basal planes ensured vertical ion penetration, vacant sites for water oxidation, and easy O 2 release from the material, and (c) electrochemical impedance spectroscopy results suggested that nanomesh formation ensured fast charge propagation inside the nanomaterial during the oxygen evolution reaction (OER) and fast charge transfer at the electrode/electrolyte interface.

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“…In the case of bimetallic phosphides supported on nickel foam (Ni x Co y P), the synergistic interaction between nickel and cobalt enables the modulation of electron redistribution around the active sites, optimizing the adsorption/desorption kinetics of reaction intermediates. 111 The Ni x Co y P catalysts can transform into hydroxides for the HER and into hydroxyoxides for the OER, exhibiting excellent overall water electrolysis performance. Defect engineering is also applicable to enhancing the OER activity of TMPs.…”

Section: Regulatory Strategies To Design Tmpsmentioning

confidence: 99%

Design and multilevel regulation of transition metal phosphides for efficient and industrial water electrolysis

Liu,

Yu,

Fan

et al. 2024

Nanoscale

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Boosted water electrolysis capability of NixCoyP via charge redistribution and surface activation

Cited by 18 publications

References 82 publications

Cu Regulating the Bifunctional Activity of Co-O Sites for the High-Performance Rechargeable Zinc-Air Battery

Cu Regulating the Bifunctional Activity of Co-O Sites for the High-Performance Rechargeable Zinc-Air Battery

One-Pot Synthesis of CoFe-Nanomesh for Oxygen Evolution Reaction

Design and multilevel regulation of transition metal phosphides for efficient and industrial water electrolysis

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