The Flexibility of an Amorphous Cobalt Hydroxide Nanomaterial Promotes the Electrocatalysis of Oxygen Evolution Reaction

Liu, Juzhe; Nai, Jianwei; You, Tingting; An, Pengfei; Zhang, Jing; Ma, Guanshui; Niu, Xiaogang; Liang, Chao; Yang, Shihe; Guo, Lin

doi:10.1002/smll.201703514

Cited by 138 publications

(128 citation statements)

References 62 publications

(87 reference statements)

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“…The O2 peak centered at 531.7 eV is in accordance with the oxygen defect species with a low oxygen coordination (i.e., oxygen vacancies) . The peak of O3 at 533.0 eV is associated with hydroxyl species from chemisorbed oxygen or adsorbed water . It is evident that the O2 peak representing oxygen vacancies occupies the main part of the O 1s spectra, illustrating the existence of abundant oxygen vacancies in Am‐CFDH/NCNTs hybrid, which is beneficial to promote the OER activity.…”

Section: Resultsmentioning

confidence: 80%

Amorphous CoFe Double Hydroxides Decorated with N‐Doped CNTs for Efficient Electrochemical Oxygen Evolution

Liu

et al. 2019

ChemSusChem

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The development and design of a highly active and affordable nanostructured material as an efficient electrocatalyst for electrochemical oxygen evolution is a pressing necessity to realize industrial production of hydrogen by water electrolysis. Amorphous nanocomposites have recently attracted interest owing to their superior electrocatalytic activity derived from their unique structure. Herein, amorphous CoFe double hydroxides (Am‐CFDH) decorated with N‐doped carbon nanotubes (NCNTs) is synthesized by a facile and simple one‐pot approach under room temperature. Through electrochemical measurement, the bare Am‐CFDH nanocomposite already exhibits a comparable oxygen evolution reaction (OER) activity to the commercial IrO2 catalyst on account of its amorphous nature and the interaction between Co and Fe. The introduced NCNTs can provide better electrical conductivity, more anchoring sites, and functional groups for enhancing the transfer of electrons and reactants, preventing the agglomeration of Am‐CFDH to expose more active sites, and improving the synergistic effect between Am‐CFDH and NCNTs. Thus, the Am‐CFDH/NCNTs hybrid displays favorable durability beyond 20 h and advanced OER activity, owning a small overpotential of 270 mV at 10 mA cm−2 and a low Tafel slope of 56.88 mV dec−1 in alkaline medium.

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Section: Resultsmentioning

confidence: 80%

Amorphous CoFe Double Hydroxides Decorated with N‐Doped CNTs for Efficient Electrochemical Oxygen Evolution

Liu

et al. 2019

ChemSusChem

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“…Over the years, amorphous structures and components have been explored for electrocatalysis where in many cases the identification has been recognized as amorphous materials rather than MGNs. However, in the electrocatalyst community, metallic glass is not recognized as a unique material but commonly assigned to the group of amorphous materials together with metal oxides, [168] layered double hydroxides [169] (LDHs), etc. [167] These types of discrepancies makes it more difficult for researchers to follow the most recent advances.…”

Section: Figure 18mentioning

confidence: 99%

“…Generally metallic glass is recognized as compounds composed of all metal or metal and nonmetal elements, where oxygen is not part of the group. However, in the electrocatalyst community, metallic glass is not recognized as a unique material but commonly assigned to the group of amorphous materials together with metal oxides, [168] layered double hydroxides [169] (LDHs), etc.…”

Section: Figure 18mentioning

confidence: 99%

Recent Advances in Metallic Glass Nanostructures: Synthesis Strategies and Electrocatalytic Applications

Doubek

McMillon‐Brown

et al. 2018

Advanced Materials

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transformers [2] and load bearing applications. [3] In the last few decades, the study of nanomaterials has become a central focus in nanoscience and nanotechnology. [4] In fact, many studies have shown that with reduction in size, nanomaterials display novel electrical, mechanical, chemical and optical properties, which are largely believed to be the result of surface and quantum confinement effects. [4,5] Remarkably, this trend has found traction in the metallic glass field where metallic glasses nanostructures (MGNs) demonstrate an important role in many applications such as light harvesting, [6] photovoltaic, [7] biomedical, [8] magneto-optical, [9] organic synthesis, [10] lithium-ion batteries [11] and electrocatalysis. [12] Recently, MGNs are receiving increased attention due to their distinguished performance, such as high activity and long term stability in electrocatalytic reactions. [12,13] Although several review papers have already covered the topic of nanopatterning of bulk metallic glasses (BMGs), [14][15][16] the correlation between recent synthetic methods and electrocatalytic applications for MGNs has not been thoroughly addressed. Moreover, there is currently no review that unites MGNs synthesized from different approaches (top-down and bottom-up) with conventional electrochemical reactions. Therefore, in this review our mission is to: 1) present a focused perspective on the latest fabrication techniques of MGNs toward the pursuit of novel electrocatalysts and electrodes; 2) highlight recent advances in computational screening and predictions that could be applied toward new metallic glass electrocatalyst discovery; and 3) report distinct advancements in electrocatalytic applications related to MGNs by creating a comprehensive discussion for commonly employed kinetic parameters and their connection with the unique material structure. Finally, as the first progress report on the metallic glass based electrocatalysts, we will also highlight some of the challenges that need to be addressed toward future progress in this field.BMGs are those metallic glasses (MGs) that can be made in 'bulk' scale with good glass forming abilities, [17] representing a versatile platform for many applications. To date, a wide range of BMG-forming alloys have been developed, including Zr-, [18] Fe-, [19] Cu-, [20] Ni-, [21] Ti-, [22] Mg-, [23] Pd-, [24] Au-, [25] and Pt-based compositions. [26] Moreover, the increased disorder brought by the higher degree of multinary systems is believed to contribute to improving the glass formation. [27] The evolution to multicomponent alloys of the most recent MG studies has also made them natural candidates for catalysis. The amorphous multinary Recent advances in metallic glass nanostructures (MGNs) are reported, covering a wide array of synthesis strategies, computational discovery, and design solutions that provide insight into distinct electrocatalytic applications. A brief introduction to the development and unique features of MGNs with an overview of top-down and bottom-up sy...

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“…ThisIn the exploration of highly efficient electrocatalysts for clean energy generation, amorphous materials have demonstrated superior performance compared with their crystalline counterparts due to the abundant active sites in amorphous structures. [1][2][3][4][5] As a typical example, amorphous molybdenum Adv.…”

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confidence: 99%

Ligand‐Exchange‐Induced Amorphization of Pd Nanomaterials for Highly Efficient Electrocatalytic Hydrogen Evolution Reaction

et al. 2020

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Various kinds of amorphous materials, such as transition metal dichalcogenides, metal oxides, and metal phosphates, have demonstrated superior electrocatalytic performance compared with their crystalline counterparts. Compared to other materials for electrocatalysis, noble metals exhibit intrinsically high activity and excellent durability. However, it is still very challenging to prepare amorphous noble‐metal nanomaterials due to the strong interatomic metallic bonding. Herein, the discovery of a unique thiol molecule is reported, namely bismuthiol I, which can induce the transformation of Pd nanomaterials from face‐centered‐cubic (fcc) phase into amorphous phase without destroying their integrity. This ligand‐induced amorphization is realized by post‐synthetic ligand exchange under ambient conditions, and is applicable to fcc Pd nanomaterials with different capping ligands. Importantly, the obtained amorphous Pd nanoparticles exhibit remarkably enhanced activity and excellent stability toward electrocatalytic hydrogen evolution in acidic solution. This work provides a facile and effective method for preparing amorphous Pd nanomaterials, and demonstrates their promising electrocatalytic application.

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The Flexibility of an Amorphous Cobalt Hydroxide Nanomaterial Promotes the Electrocatalysis of Oxygen Evolution Reaction

Cited by 138 publications

References 62 publications

Amorphous CoFe Double Hydroxides Decorated with N‐Doped CNTs for Efficient Electrochemical Oxygen Evolution

Amorphous CoFe Double Hydroxides Decorated with N‐Doped CNTs for Efficient Electrochemical Oxygen Evolution

Recent Advances in Metallic Glass Nanostructures: Synthesis Strategies and Electrocatalytic Applications

Ligand‐Exchange‐Induced Amorphization of Pd Nanomaterials for Highly Efficient Electrocatalytic Hydrogen Evolution Reaction

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