Activating the lattice oxygen in (Bi0.5Co0.5)2O3 by vacancy modulation for efficient electrochemical water oxidation

Liu, Huan; Li, Xiaoning; Peng, Chengxiao; Zhu, Liuyang; Zhang, Yuanxi; Cheng, Huiru; Cui, Jiameng; Wu, Qianni; Zhang, Yingying; Chen, Zezhi; Zou, Wei; Gu, Wen; Huang, Haoliang; Wang, Jianlin; Ye, Bangjiao; Fu, Zhengping; Lu, Yalin

doi:10.1039/d0ta03411h

Cited by 64 publications

(22 citation statements)

References 46 publications

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“…For Co(OH)F@NF and Co(OH) 2 @NF, their O 1s XPS spectra (Figure a,b) are divided into three major peaks classified as oxygen vacancy (O-Vacancy), M–O/M–OH, and oxygen-containing functional groups adsorbed on the surface (O-Adsorbed). , Their similar O 1s XPS spectra indicate the tiny influence exerted by F on the chemical environment of O species in the precursors. However, sharp peaks at 529.5 and 529.1 eV in O 1s XPS spectra of Co 3 O 4 @NF and V o -poor-Co 3 O 4 @NF are obtained, representing the existence of lattice oxygen (O-Lattice) . Accordingly, the relative contents of these three O species (i.e., O-Vacancy, M–O/M–OH, and O-adsorbed) were calculated and are shown in Figure c.…”

Section: Resultsmentioning

confidence: 95%

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Constructing a Hetero-interface Composed of Oxygen Vacancy-Enriched Co₃O₄ and Crystalline–Amorphous NiFe-LDH for Oxygen Evolution Reaction

Wang

et al. 2021

ACS Catal.

183

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The development of high-performance electrocatalysts is a highly efficient strategy to optimize the sluggish kinetic property of the oxygen evolution reaction (OER). Herein, we synthesize a kind of nickel foam (NF)-supported electrocatalyst composed of a one-dimensional Co3O4 nanowire as the core and a two-dimensional NiFe-LDH nanosheet as the shell (denoted as NiFe-60/Co3O4@NF). Fluorine is introduced into the precursor Co(OH)F of Co3O4, which results in improved thermal stability and significantly increased regularly distributed oxygen vacancies, while the electrochemically deposited NiFe-LDH nanosheets possess a crystalline/amorphous hybrid structure. As a result, the hetero-interface mainly constituting Ni species from NiFe-LDH and Co3O4 from Co(OH)F contributes to the interaction between Co and Fe species and facilitates the electron transfer. Simultaneously, the interaction between oxygen vacancies in Co3O4 and coordinatively unsaturated Fe species in the amorphous area in NiFe-LDH is also determined, finally completing the electron backtracking. Benefiting from these factors, only low overpotentials of 221 and 257 mV are required to deliver the current densities of 100 and 500 mA cm–2, respectively, with a quite small Tafel slope of 34.6 mV dec–1 during OER for the well-designed NiFe-60/Co3O4@NF electrocatalyst.

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Section: Resultsmentioning

confidence: 95%

“…Moreover, it is also worth noting, in Figure b, that the O 1s XPS spectra of Co 3 O 4 @NF are positively shifted to 0.4 eV compared to that of V o -poor-Co 3 O 4 @NF. Such a phenomenon illustrates the hybridization between Co 3d and O 2p orbitals caused by increased O-Vacancy, which could be attributed to the high electronegativity of F.…”

Section: Resultsmentioning

confidence: 99%

Constructing a Hetero-interface Composed of Oxygen Vacancy-Enriched Co₃O₄ and Crystalline–Amorphous NiFe-LDH for Oxygen Evolution Reaction

Wang

et al. 2021

ACS Catal.

183

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“…[ 105 ] However, this process requires a large activation barrier, and litter progress has been achieved in the past few decades. In more recent years, several reputed groups have made substantial progress on activating LOM in several catalysts, including perovskites, [ 100 ] binary, [22c] and trinary metal oxides [ 106 ] as well as LDHs [ 107 ] through tuning the metal–oxygen covalency. Moreover, since metal vacancy dynamics is clear in the LOM, it is urgently required to develop dynamic vacancy‐related descriptors to evaluate the OER activity and find an optimal catalyst with lower overpotential.…”

Section: Computational Approaches To Dynamic Surfacesmentioning

confidence: 99%

“…In particular, for a classic lattice oxygen involving in the OER process, an understanding on the vacancy dynamics will be important in tracing the activation and optimizing the performance of an OER catalyst. [ 22 ] Indeed, vacancy dynamics have been considered as a key component in the dynamic surface chemistry of OER catalysts.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Surface Chemistry of Catalysts in Oxygen Evolution Reaction

Kou

Zhang

et al. 2021

Small Science

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Electrocatalytic oxygen evolution reaction (OER) is a crucial anode reaction where electrocatalysts are the key elements and their dynamic surface chemistry runs throughout the entire process. Herein, we examine the latest advances and challenges in understanding of the dynamic surface chemistry of OER electrocatalysts. There are electrochemical origin and driving force for the dynamic surface nature, where several processes can take place either concurrently or sequentially, including reconstruction (i.e., phase formation/transformation, morphological change, and compositional change), vacancy generation and filling/refilling, and the intermediate adsorption-desorption process on catalytic surface. These dynamic surface processes of OER catalysts are impacted by not only the reaction and service conditions, including the (local) pH and its gradient distribution, applied potential, types and concentration of exotic ions and external fields on top of the nature of catalysts/precatalysts, but also their interactions. Due to the local, time-dependent and instant nature, there are considerable challenges in tracing, modelling and understanding of the complete dynamic surface chemistry of catalysts in OER, by means of ex situ, in situ and operando experimental investigations. Therefore, computational studies and dynamic simulations help provide key insights in future pursuits, where there is critical need for a multiscale computational modelling approach encompassing all these aspects.

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“…We can explain this phenomenon as the activation of lattice oxygen in the OER process, promoting the formation of highly active metal hydroxyl oxides. [48,49] AQD also shows better OER kinetics than BZD, which is also conducive to the high crystal linity of AQD, providing more charge transfer orbitals, enhancing charge transfer and facilitating the electrocatalytic reaction. Then, S defects on metal compounds can effectively enhance charge transfer by adjusting the electronic structure of metal compounds and the energy barriers of corresponding intermediates and reactants.…”

Section: Electrocatalytic Performance and Mechanism For Oermentioning

confidence: 99%

3D‐Stretched Film Ni₃S₂ Nanosheet/Macromolecule Anthraquinone Derivative Polymers for Electrocatalytic Overall Water Splitting

Chen

Jiang

et al. 2021

Small

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Transition metal sulfide (TMSs) has been one of the most promi sing candidate materials to replace noble metals for OWS because of advantages such as costeffectiveness, abundance, facile fabrication, among others. [4][5][6] How ever, the poor conductivity and stability of TMSs based electrocatalysts hinder their practical application in largescale sustain able hydrogen production.Composite engineering is an excellent strategy to raise the catalytic performance of TMSs further, [7,8] and the composite of TMSs and carbon materials has attracted much attention due to their superior sta bility and conductivity. Carbon materials with macrocyclic frameworks, graphite and graphitelike structures have been widely studied. [2,9,10] Because of the chem ical stability, thermal stability and highly adjustable photoelectric properties, as carriers of catalyst, this kind of carbon material have been used for electrochemical applications such as OWS, oxygen evolution reaction (OER), carbon dioxide reduction, and hydrogen evolution reaction (HER). [11,12] The study also shows that the macrocyclic carbon framework material enhances the crystallization ability of ZIF 8, [13] which solves the problem of low crystallinity of metal organic frameworks prepared by traditional benzene derivatives (BZD). As a significant natural and synthetic compound with a macrocyclic skeleton structure, anthraquinone derivatives For the first time, a new polymer electrode AQS/S is prepared by compositing Ni 3 S 2 nanosheets and macromolecular anthraquinone derivative (AQD) supported on nickel foam with flying colors. The AQS/S exhibits high crystalline structure and abundant S defects. Density of state calculation shows that AQD has stable internal bonding and easy external bonding with metals, conducive to the dispersion of metal reaction sites, ensuring excellent activity and high stability. Under 1.0 m KOH solution, ultralow overpotentials of 62 and 133 mV at 10 mA cm −2 on AQS/S for hydrogen evolution reaction and on activated AQS/S (A-AQS/S) for oxygen evolution reaction, respectively, are achieved. 100 h chronopotentiometry and the cyclic voltammetry tests show that catalysts have high durability. The AQS/S‖A-AQS/S two-electrode system is also found to have good electrocatalytic activity for 1.43 V to get 10 mA cm −2 in overall water splitting, better than the state-of-the-art 20% Pt/C‖RuO 2 combination.

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Activating the lattice oxygen in (Bi_0.5Co_0.5)₂O₃ by vacancy modulation for efficient electrochemical water oxidation

Abstract:
Lattice-oxygen-active (Bi_0.5Co_0.5)₂O₃ was successfully prepared through vacancy modulation and demonstrated great OER activity and performance.

Cited by 64 publications

References 46 publications

Constructing a Hetero-interface Composed of Oxygen Vacancy-Enriched Co₃O₄ and Crystalline–Amorphous NiFe-LDH for Oxygen Evolution Reaction

Constructing a Hetero-interface Composed of Oxygen Vacancy-Enriched Co₃O₄ and Crystalline–Amorphous NiFe-LDH for Oxygen Evolution Reaction

Dynamic Surface Chemistry of Catalysts in Oxygen Evolution Reaction

3D‐Stretched Film Ni₃S₂ Nanosheet/Macromolecule Anthraquinone Derivative Polymers for Electrocatalytic Overall Water Splitting

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Activating the lattice oxygen in (Bi0.5Co0.5)2O3 by vacancy modulation for efficient electrochemical water oxidation

Abstract: Lattice-oxygen-active (Bi0.5Co0.5)2O3 was successfully prepared through vacancy modulation and demonstrated great OER activity and performance.

Cited by 64 publications

References 46 publications

Constructing a Hetero-interface Composed of Oxygen Vacancy-Enriched Co3O4 and Crystalline–Amorphous NiFe-LDH for Oxygen Evolution Reaction

Constructing a Hetero-interface Composed of Oxygen Vacancy-Enriched Co3O4 and Crystalline–Amorphous NiFe-LDH for Oxygen Evolution Reaction

Dynamic Surface Chemistry of Catalysts in Oxygen Evolution Reaction

3D‐Stretched Film Ni3S2 Nanosheet/Macromolecule Anthraquinone Derivative Polymers for Electrocatalytic Overall Water Splitting

Contact Info

Product

Resources

About

Activating the lattice oxygen in (Bi_0.5Co_0.5)₂O₃ by vacancy modulation for efficient electrochemical water oxidation

Abstract:
Lattice-oxygen-active (Bi_0.5Co_0.5)₂O₃ was successfully prepared through vacancy modulation and demonstrated great OER activity and performance.

Constructing a Hetero-interface Composed of Oxygen Vacancy-Enriched Co₃O₄ and Crystalline–Amorphous NiFe-LDH for Oxygen Evolution Reaction

Constructing a Hetero-interface Composed of Oxygen Vacancy-Enriched Co₃O₄ and Crystalline–Amorphous NiFe-LDH for Oxygen Evolution Reaction

3D‐Stretched Film Ni₃S₂ Nanosheet/Macromolecule Anthraquinone Derivative Polymers for Electrocatalytic Overall Water Splitting