Self-dissociation-assembly of ultrathin metal-organic framework nanosheet arrays for efficient oxygen evolution

Huang, Liang; Gao, Ge; He, Zhi‐Guo; Chen, Jinxing; Fang, Youxing; Dong, Shaojun

doi:10.1016/j.nanoen.2019.104296

Cited by 108 publications

(118 citation statements)

References 35 publications

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“…Besides of NiFe foams, the CoNi‐based electrocatalysts prepared through corrosion engineering was also investigated for OER application by Huang et al. [ 108 ] The ultrathin metal–organic framework (MOF) nanosheet arrays on CoNi foams were synthesized by using an in situ self‐dissociation‐assembly approach. The benzenedicarboxylic acid (BDC) was utilized to corrode the CoNi foams to release Co 2+ and Ni 2+ ions, which simultaneously coordinated with BDC to generate Co 9 Ni 1 –MOF nanosheet arrays with the thickness of 8.2 nm.…”

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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“…In contrast to pure 2D Co MOFs, 2D hybrid Co-based MOFs with metal heteroatoms (e. g. Fe, Ni), inheriting the controllable morphology and allowing for tailoring of the electronic structure, have demonstrated improved OER catalytic activity. [58,[76][77][78][79][80] For example, Lee et al [76] grew 2D CoNi-MOFs with different atom ratios of Co and Ni on Cu foil substrates using a hydrothermal procedure. The optimal material, CoNi (1 : 1)-MOF (thickness: 5.3 nm), showed a η of 265 mV at 10 mA cm À 2 , lower than that of pure Co MOF (341 mV).…”

Section: D Co-based Mof Hybridsmentioning

confidence: 99%

“…In addition, the template‐assisted approach is another emerging method to fabricate hybrid 2D MOFs featuring superior interfacial connection for good electrical conductivity, robust structural stability and thus good catalytic performance. For example, Dong and associates [58] used the template‐assisted approach to prepare ultrathin Co 9 Ni 1 ‐MOF nanosheet arrays on Co 9 Ni 1 foam substrates. The surface layer of the metallic Co 9 Ni 1 self‐dissociated in the presence of benzenedicarboxylic acid (BDC) solution during a hydrothermal process, forming 2D Co 9 Ni 1 ‐MOF nanosheet arrays on the substrate.…”

Section: Preparation and Characterization Of 2d Mofsmentioning

confidence: 99%

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Recent Progress of Two‐Dimensional Metal‐Organic Frameworks and Their Derivatives for Oxygen Evolution Electrocatalysis

et al. 2020

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The development of high‐performance transition metal−based electrocatalysts for the oxygen evolution reaction (OER) is paramount for electrochemical secondary metal‐air batteries and water splitting. Two‐dimensional (2D) metal‐organic framework (MOF) nanosheets have recently emerged as a novel class of efficient electrocatalysts for OER, due to a high specific surface area, ultrasmall thickness and abundance of active sites. Here, we summarize recent progress in the preparation and characterization of 2D transition metal−based MOFs (e. g. Ni, Co and Cu), as well as their composites and derivatives, including metals/alloys, metal oxides/chalcogenides and metal phosphides/hydroxides, as OER electrocatalysts reported over the past several years. Design principles and preparation routes are presented. The performance of the electrocatalysts is directly compared in terms of overpotential (η) (thermodynamics) and electrocatalytic current density (kinetics), as well as operational stability (economics). Many of these materials exhibit superior catalytic activity compared to the noble metal−based catalysts such as RuO2 (η<300 mV at 10 mA cm−2), and considerable stability with negligible decay with operation over several hours to days. Challenges and perspectives of applying 2D MOFs and their derivatives for OER electrocatalysis are also discussed.

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“…[16][17][18][19] Compared with bulk MOF, the thinner Page 2 of 34 CCS Chemistry 3 the MOF is, the more easily to expose the active sites and enhance the catalytic activity. [20][21][22][23] For example, Li et al have selected a thick layered MOF (~30 nm) as template to construct Co 3 O 4 /C BDC nanosheet arrays and used as OER electrocatalyst. 24 However, ultrathin MOF nanosheets, with higher-aspect-ratio and ultrathin characteristics than bulk MOFs and thick layered MOFs, are supposed as more idea pre-assembling platforms:…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Metal–Organic Framework Nanosheets-Derived Yolk–Shell Ni _0.85 Se@NC with Rich Se-Vacancies for Enhanced Water Electrolysis

et al. 2021

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Selecting ultrathin MOF nanosheets as pre-assembling platforms, yolk-shell structured few-layer N-doped carbon (NC) shell encapsulated Ni 0.85 Se core (denoted as Ni 0.85 Se@NC) via an oriented phase modulation (OPM) strategy are controllably fabricated. The ultrathin nature of MOF nanosheets give rise to the modification of structure at the electronic level with abundant Se-vacancies and effective electronic coupling via the Ni-N x coordination at the interface between the Ni 0.85 Se core and NC shell. The obtained Ni 0.85 Se@NC exhibits low overpotentials for both oxygen evolution reaction (OER) (300 mV) and hydrogen evolution reaction (HER) (157 mV) at 10 mA•cm-2 in alkaline condition, outperforming the corresponding bulk MOFderived counterparts. Through exploiting Ni 0.85 Se@NC as anode and cathode catalysts, a low cell voltage of 1.61 V is achieved to perform alkaline water electrolysis. Remarkably, it also achieves high activity in natural seawater (pH = 7.98) and simulated seawater (pH = 7.86) electrolytes, even surpassing integrated Pt/C-RuO 2 /CC electrodes. Density functional theory (DFT) studies illustrate that abundant Se-vacancies effectively regulate the electronic structure of Ni 0.85 Se@NC by accelerating electron transfer from Ni to N atoms at the interface, and thus make the Ni 0.85 Se@NC a near-optimal electronic configuration to stimulate ideal adsorption free energy toward key reaction intermediates.

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Self-dissociation-assembly of ultrathin metal-organic framework nanosheet arrays for efficient oxygen evolution

Cited by 108 publications

References 35 publications

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

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

Recent Progress of Two‐Dimensional Metal‐Organic Frameworks and Their Derivatives for Oxygen Evolution Electrocatalysis

Ultrathin Metal–Organic Framework Nanosheets-Derived Yolk–Shell Ni _0.85 Se@NC with Rich Se-Vacancies for Enhanced Water Electrolysis

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Self-dissociation-assembly of ultrathin metal-organic framework nanosheet arrays for efficient oxygen evolution

Cited by 108 publications

References 35 publications

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

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

Recent Progress of Two‐Dimensional Metal‐Organic Frameworks and Their Derivatives for Oxygen Evolution Electrocatalysis

Ultrathin Metal–Organic Framework Nanosheets-Derived Yolk–Shell Ni 0.85 Se@NC with Rich Se-Vacancies for Enhanced Water Electrolysis

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Product

Resources

About

Ultrathin Metal–Organic Framework Nanosheets-Derived Yolk–Shell Ni _0.85 Se@NC with Rich Se-Vacancies for Enhanced Water Electrolysis