Biomimetic design of ultrathin edge-riched FeOOH@Carbon nanotubes as high-efficiency electrocatalysts for water splitting

Li, Huanxin; Zhou, Qiang; Liu, Fuyu; Zhang, Wenlong; Tan, Zhong Fu; Zhou, Haihui; Huang, Zhongyuan; Jiao, Shuqiang; Kuang, Yafei

doi:10.1016/j.apcatb.2019.117755

Cited by 74 publications

(34 citation statements)

References 65 publications

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“…It can be seen that NiFeCo‐LDH/CF exhibits the lowest overpotential (249 mV at j = 10 mA cm −2 ) and the same trend of Tafel slopes for the series catalysts, which can be attributed to the optimized electronic structure permitting fast charge transfer and benefiting adsorption/desorption for oxygenated species. [ 17b,30 ] Furthermore, partial electronic redistribution among Ni, Fe, and Co by the bridging O 2− at the interface of the catalysts can further improve the adsorption/desorption character of oxygenated species, thus enhancing the electrocatalytic kinetics for OER. More comparison for OER activities with other nickel, iron, and/or cobalt‐based catalysts in recently reported literatures was also summarized in Table S2 of the Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

“…These results indicate that the introduction of CF and Co in NiFeCo‐LDH/CF increases the electronic conductivity and accelerates the charge transfer rate during the OER process. [ 30,31 ] Furthermore, as shown in Figure 6f, the evaluation of NiFeCo‐LDH/CF stability was carried out by chronoamperometry measurement. Compared with NiFe‐LDH and NiFeCo‐LDH (Figure S14, Supporting Information), the NiFeCo‐LDH/CF catalyst exhibits outstanding stability at an overpotential of 249 mV, which displays only a negligible degradation in current density after the long electrolysis of 20 h. Meanwhile, the long cycle LSV curves were presented in the inset in Figure 6f as well.…”

Section: Resultsmentioning

confidence: 99%

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Co‐Induced Electronic Optimization of Hierarchical NiFe LDH for Oxygen Evolution

Lin

Wang

Peng

et al. 2020

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Developing efficient and stable non‐noble electrocatalysts for the oxygen evolution reaction (OER) remains challenging for practical applications. While nickel–iron layered double hydroxides (NiFe‐LDH) are emerging as prominent candidates with promising OER activity, their catalytic performance is still restricted by the limited active sites, poor conductivity and durability. Herein, hierarchical nickel–iron–cobalt LDH nanosheets/carbon fibers (NiFeCo‐LDH/CF) are synthesized through solvent‐thermal treatment of ZIF‐67/CF. Extended X‐ray adsorption fine structure analyses reveal that the Co substitution can stabilize the Fe local coordination environment and facilitate the π‐symmetry bonding orbital in NiFeCo‐LDH/CF, thus modifying the electronic structures. Coupling with the structural advantages, including the largely exposed active surface sites and facilitated charge transfer pathway ensured by CF, the resultant NiFeCo‐LDH/CF exhibits excellent OER activity with an overpotential of 249 mV at 10 mA cm−1 as well as robust stability over 20 h.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Co‐Induced Electronic Optimization of Hierarchical NiFe LDH for Oxygen Evolution

Lin

Wang

Peng

et al. 2020

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268

111

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“…Although the noble‐metal‐based materials, such as IrO 2 and RuO 2 , are state‐of‐the‐art catalysts for OER, they are limited by scarcity and unaffordable cost . Therefore, developing low‐cost, stable and earth‐abundant metal electrocatalysts for OER is crucial …”

Section: Introductionmentioning

confidence: 99%

“…Constructing hierarchical structure by hybridizing FeOOH with conductive substrate is an effective strategy to fully expose the active sites and facilitate fast charge transfer during electrochemical reactions. Traditional conductive substrates such graphene and carbon nanotube inevitably compromise between conductivity and surface functional groups, thus limiting their application in electric catalysis …”

Section: Introductionmentioning

confidence: 99%

Ambient Growth of Hierarchical FeOOH/MXene as Enhanced Electrocatalyst for Oxygen Evolution Reaction

Zhao

Lin

et al. 2020

ChemistrySelect

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The integration of highly accessible electro‐active sites and the high conductivity can enhance the catalytic performance of catalysts. Herein, we report a facile ambient growth of FeOOH nanosheets (NSs) on the surface of Ti3C2 nanosheets to fabricate the hierarchical FeOOH NSs/Ti3C2. The hierarchical structure efficiently suppresses agglomeration of nanosheets to expose maximal electro‐active surface, and provides strong interfacial interaction between FeOOH and Ti3C2 that facilitates fast charge transfer, leading to enhanced electrocatalytic performance. Specifically, the FeOOH NSs/Ti3C2 achieves a current density of 10 mA cm−2 at 1.63 V vs RHE with a Tafel slope of 95 mV dec−1, and possesses excellent OER stability with negligible attenuation of current density after 30 h. This work represents that growth of poor conductive active materials on 2D MXene can boost the catalytic performance of electrocatalyst.

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“…The iron oxide family (Fe 2 O 3 , Fe 3 O 4 ) is considered a candidate material for the next generation of lithium-ion anode materials (Chen et al, 2019a,b;Li et al, 2019). Iron oxide has the following advantages: easy availability, natural nontoxicity, low cost and very high theoretical capacity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrochemical Property of FeOOH/Graphene Oxide Composites

et al. 2020

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A facile ultrasonication method was used to uniformly mix nanospindle-shaped FeOOH (80-100 nm) and a conductive matrix of graphene oxide (GO) to form FeOOH/GO composites. No carbon peak was observed in the X-ray diffraction pattern, indicating that the graphene oxide did not stack together and that the dispersion of graphene was very high. X-ray photoelectron spectroscopy (XPS) tests showed that the formation of Fe-O-C bonds played a positive role in electron transport, revealing that it has a certain impact on the electrochemical performance of FeOOH/GO. The FeOOH/GO was further characterized by TGA, and the content of GO in the synthesized sample was 6.68%. Compared with that of FeOOH, the initial discharge capacity of FeOOH/GO could reach 1437.28 mAh/g. Additionally, compared to that of pure FeOOH, the reversibility of the electrochemical reaction of FeOOH/GO was improved, and the impedance value was reduced. Finally, FeOOH/GO was used directly as a lithium-ion battery (LIB) anode material to improve the kinetics of the Lithium ions insertion/extraction process and improve ionic conductivity.

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Biomimetic design of ultrathin edge-riched FeOOH@Carbon nanotubes as high-efficiency electrocatalysts for water splitting

Cited by 74 publications

References 65 publications

Co‐Induced Electronic Optimization of Hierarchical NiFe LDH for Oxygen Evolution

Co‐Induced Electronic Optimization of Hierarchical NiFe LDH for Oxygen Evolution

Ambient Growth of Hierarchical FeOOH/MXene as Enhanced Electrocatalyst for Oxygen Evolution Reaction

Synthesis and Electrochemical Property of FeOOH/Graphene Oxide Composites

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