Unique nanosheet–nanowire structured CoMnFe layered triple hydroxide arrays as self-supporting electrodes for a high-efficiency oxygen evolution reaction

Guo, Meichen; Zhou, Lingxi; Li, Yao; Zheng, Qiaoji; Xie, Fengyu; Lin, Dunmin

doi:10.1039/c9ta01531k

Cited by 68 publications

(37 citation statements)

References 57 publications

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“…Importantly, self‐supporting electrocatalysts can be directly utilized as the electrode for water‐splitting devices without adding organic binders, which overcome the shortcomings of lowered conductivity and covered active sites for powder catalysts. [ 125–128 ] Self‐supporting electrocatalysts have also been fabricated through corrosion engineering depending on the foams or plates of Ni, Fe, NiFe, CoNi, NiAl, and stainless steel. The facile corrosion of metal substrates produces many metal ions near the interfaces, such as Ni 2+ , Fe 3+ , and Co 2+ , which take part in the formation of electrochemically active corrosion layers.…”

Section: Corrosion Engineering Enabled Electrocatalystsmentioning

confidence: 99%

Transforming Damage into Benefit: Corrosion Engineering Enabled Electrocatalysts for Water Splitting

Liu

Gong

Deng

et al. 2020

Adv Funct Materials

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Producing high‐purity hydrogen from water electrocatalysis is essential for the flourishing hydrogen energy economy. It is of critical importance to develop low‐cost yet efficient electrocatalysts to overcome the high activation barriers during water electrocatalysis. Among the various approaches of catalyst preparation, corrosion engineering that employs the autogenous corrosion reactions to achieve electrocatalysts has emerged as a burgeoning strategy over the past few years. Benefiting from the advantages of simple synthesis, effective regulation, easy scale‐up production, and extremely low cost, corrosion engineering converts the harmful corrosion process into the useful catalyst preparation, achieving the goal of “transforming damage into benefit.” Herein, the concept of corrosion engineering, fundamental reaction mechanisms, and affecting factors are firstly introduced. Then, recent progresses on corrosion engineering for fabricating electrocatalysts toward water splitting are summarized and discussed. Specific attentions are devoted to the formation mechanisms, catalytic performances, and structure–activity relations of these catalysts as well as the approaches employed for performance improvements. At last, the current challenges and future exploiting directions are proposed for achieving highly active and durable electrocatalysts. It is envisioned to shed light on the multidisciplinary corrosion engineering that is closely associated with corrosion and material science for energy and environmental applications.

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Section: Corrosion Engineering Enabled Electrocatalystsmentioning

confidence: 99%

Transforming Damage into Benefit: Corrosion Engineering Enabled Electrocatalysts for Water Splitting

Liu

Gong

Deng

et al. 2020

Adv Funct Materials

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“…The peaks located at binding energies of 641.7 and 653.3 eV correspond to Mn 2p 1/2 and Mn 2p 3/2 , confirming the existence of Mn 3+ in the 5.0 Mn-NiFe LDH/rGO [32]. While the hydroxyl ion is a weak-field ligand, the Mn 3+ ions in bimetallic LDH are shown in a high spin state, which will result in lattice instability in LDH composite [17]. Therefore, the Mn 3+ can be easily oxidized to Mn 4+ , and thus the peaks of Mn (IV) can be observed in the Mn 2p XPS spectra.…”

Section: Resultsmentioning

confidence: 64%

“…Recently, layered double hydroxides (LDHs) have exhibited remarkably potential applications in designing advanced OER electrocatalysts [14][15][16][17][18][19]. For example, NiFe LDH displayed enhanced OER performance in alkaline solutions [20,21] and the improvement of activity was generally attributed to the high oxidation state of Fe during the OER process [22,23].…”

Section: Introductionmentioning

confidence: 99%

Regulating the electronic structure of NiFe layered double hydroxide/reduced graphene oxide by Mn incorporation for high-efficiency oxygen evolution reaction

Jiang

Cheong

et al. 2021

Sci. China Mater.

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The development of highly efficient and costeffective oxygen evolution reaction (OER) electrocatalysts for renewable energy systems is vitally essential. Modulation of the electronic structure through heteroatom doping is considered as one of the most potential strategies to boost OER performances. Herein, a rational design of Mn-doped NiFe layered double hydroxide/reduced graphene oxide (Mn-NiFe LDH/rGO) is demonstrated by a facile hydrothermal approach, which exhibits outstanding OER activity and durability. Experimental results and density functional theory (DFT) calculations manifest that the introduction of Mn can reprogram the electronic structure of surface active sites and alter the intermediate adsorption energy, consequently reducing the potential limiting activation energy for OER. Specifically, the optimal Mn-NiFe LDH/rGO composite shows an enhanced OER performance with an ultralow overpotential of 240 mV@10 mA cm −2 , Tafel slope of 40.0 mV dec −1 and excellent stability. Such superior OER activity is comparable to those of the recently reported state-of-the-art OER catalysts. This work presents an advanced strategy for designing electrocatalysts with high activity and low cost for energy conversion applications.

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“…The as‐obtained nanocomposite possessed the combined characteristics of both nanowires and nanosheets, thereby ensuring comparable electrochemical performances, like high specific capacitance values of 1673.3 and 453.0 F g −1 at 3 and 15 A g −1 , respectively. Guo et al successfully fabricated CoMnFe‐layered triple hydroxide arrays with unique nanosheet‐nanowire structure grown on three‐dimensional (3D) nickel foam, which provided open channels for fast gas releasing and increased electronic conductivity, and thus promoted the catalytic activity.…”

Section: D‐2d Synergized Nanostructurementioning

confidence: 99%

One‐dimensional and two‐dimensional synergized nanostructures for high‐performing energy storage and conversion

Wang

2019

InfoMat

248

142

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To address the worldwide energy challenges, advanced energy storage and conversion systems with high comprehensive performances, as the promising technologies, are inevitably required on a timely basis. The performance of these energy systems is intimately dependent on the properties of their electrodes. In addition to the electrode materials selection and their compositional optimization, materials fabrication with the designed nanostructure also provides significant benefits for their performances. In the past decade, considerable efforts have been made to promote the search for multidimensional nanostructures containing both onedimensional (1D) and two-dimensional (2D) nanostructures in synergy, namely, 1D-2D synergized nanostructures. By developing the freestanding electrodes with such unique nanoarchitectures, the structural features and electroactivities of each component can be manifested, where the synergistic properties among them can be simultaneously obtained for further enhanced properties, such as the increased number of active sites, fast electronic/ionic transport, and so forth. This review overviews the state-of-the-art on the 1D-2D synergized nanostructures, which can be broadly divided into three groups, namely, core/shell, cactus-like, and sandwich-like nanostructures. For each category, we introduce them from the aspects of structural features, fabrication methodologies to their successful applications in different types of energy storage/conversion devices, including rechargeable batteries, supercapacitors, water splitting, and so forth. Finally, the main challenges faced by and perspectives on the 1D-2D synergized nanostructures are discussed. K E Y W O R D S1D-2D synergized nanostructure, cactus-like nanostructure, core/shell nanostructure, energy storage/conversion, sandwich-like nanostructure

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Unique nanosheet–nanowire structured CoMnFe layered triple hydroxide arrays as self-supporting electrodes for a high-efficiency oxygen evolution reaction

Abstract: Developing highly active and low-cost electrocatalysts for the oxygen evolution reaction (OER) to meet industrial criteria is vitally essential.

Cited by 68 publications

References 57 publications

Transforming Damage into Benefit: Corrosion Engineering Enabled Electrocatalysts for Water Splitting

Transforming Damage into Benefit: Corrosion Engineering Enabled Electrocatalysts for Water Splitting

Regulating the electronic structure of NiFe layered double hydroxide/reduced graphene oxide by Mn incorporation for high-efficiency oxygen evolution reaction

One‐dimensional and two‐dimensional synergized nanostructures for high‐performing energy storage and conversion

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