Assembled 3D MOF on 2D Nanosheets for Self-boosting Catalytic Synthesis of N-doped Carbon Nanotube Encapsulated Metallic Co Electrocatalysts for Overall Water Splitting

Yang, Lijun; Li, Hui; Yang, Yu; Wu, Yang; Zhang, Lei

doi:10.1016/j.apcatb.2020.118939

Cited by 144 publications

(54 citation statements)

References 72 publications

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“…The equation to calculate the ECSA value of the electrocatalysts is; ECSA = C dl / C s where the C s is the standard specific capacitance, and its value changes with the type of the electrocatalyst and the electrolyte 58 . We have taken C s = 35 μF/cm 2 in 0.5 M H 2 SO 4 , for the calculation 59 .…”

Section: Resultsmentioning

confidence: 99%

Bio‐reduced GO /Pd nanocomposite as an efficient and green synthesized catalyst for hydrogen evolution reaction

Kayan

Turunç

2021

Int J Energy Res

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Summary In this work, we introduced a green methodology for the production of palladium (Pd) decorated reduced graphene oxide (rGO), using an endemic plant of Onosma malatyana Binzet (OMB) root extract for the first time and used it as an electrocatalyst for hydrogen evolution reaction (HER) in aqueous acidic media. Benefiting from the synergetic effect between rGO and Pd nanoparticles, the as‐prepared bio‐reduced GO/Pd (bio‐rGO/Pd) nanocomposite exhibits a remarkable performance towards HER when the results compared with the bio‐rGO and bio‐rPd nanocomposite. The HER overpotential at a current density of 10 mA cm−2 for bio‐rGO/Pd was only 0.17 V. The Tafel slope of the bio‐rGO/Pd nanocomposite film obtained from the HER polarization curves exhibits 154 mV dec−1, showing that the process is limited by the Volmer reaction step. In addition, the bio‐rGO/Pd nanocomposite electrode also showed an outstanding stability after a long‐term potential cycling measurement. It possesses a high synergetic effect, low charge transfer resistance and considerable electrochemical surface area. The all obtained results demonstrated that the bio‐rGO/Pd will be a promising green synthesized HER catalyst.

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Section: Resultsmentioning

confidence: 99%

Bio‐reduced GO /Pd nanocomposite as an efficient and green synthesized catalyst for hydrogen evolution reaction

Kayan

Turunç

2021

Int J Energy Res

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“…Process of catalytic pyrolysis with the induction of melamine as both nitrogen source and facilitator of CNTs growth to achieve the composites consisting of cobalt nanoparticles confined in multiwall N-CNTs (Co/N-CNT) as depicted in Figure 11. 131 Fan et al fabricated a bifunctional non-noble metal catalyst for promoting overall water-splitting. Bimetallic hollow Ni-Co MOFs were used as a precursor to fabricate novel Ni 1.4 Co 0.6 P/NCNHM (nitrogen-doped CNT hollow microspheres) catalyst by the process of N-doped carbon and cation substitution through a nitriding phosphating strategy.…”

Section: Synthesis Methods For Electrocatalytic Water-splittingmentioning

confidence: 99%

“…This improved performance is due to the unique 3D hierarchical tubular structure and the synergistic effects resulting in increased accessible active sites, accelerateddiffusion of electron/electrolyte, and improved electrical conductivity, hydrophilicity and structural stability of the catalyst. 131 Fan et al fabricated a non-noble metal bifunctional electrocatalysts for promoting both OER and HER for overall water-splitting. The derived electrocatalyst exhibited highly effective electrocatalytic performances and superior stability for HER (overpotential of 87.9 mV at 10 mA/cm 2 tested in 0.5 M) and OER (overpotential of 320.0 mV at 10 mA/cm 2 tested in 1 M).…”

Section: Mof As Precursor For Derived Electrocatalystmentioning

confidence: 99%

“…An efficient 3D electrode with capabilities to catalyze both HER and OER in alkaline medium was developed by Yang et al Synthesized electrode showed remarkable electrochemical performance as it required only 1.58 V to achieve 30 mA/cm 2 in an alkali‐electrolyzer and the corresponding Tafel slope of 84 mV/dec was observed. This improved performance is due to the unique 3D hierarchical tubular structure and the synergistic effects resulting in increased accessible active sites, accelerateddiffusion of electron/electrolyte, and improved electrical conductivity, hydrophilicity and structural stability of the catalyst 131 . Fan et al fabricated a non‐noble metal bifunctional electrocatalysts for promoting both OER and HER for overall water‐splitting.…”

Section: Recent Advances In Water‐splitting By Mof‐based Catalystsmentioning

confidence: 99%

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Recent advancements in MOF‐ based catalysts for applications in electrochemical and photoelectrochemical water splitting: A review

et al. 2020

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Summary A significant interest in the exploration of clean and renewable alternative energy resources has been observed in recent years to combat environmental pollution and energy shortages for a sustainable future. In this regard, hydrogen is clean, energy‐rich fuel with unlimited potential. It can be produced via water‐splitting process using the most abundant resources on earth, that is, water and solar/electrical energy. Metal‐organic frameworks (MOFs) are a category of porous crystalline materials with well‐organized structures and unique catalytic, optical, and electrical properties. MOFs and MOF‐derived materials have proved to be excellent catalysts for water‐splitting both by electrochemical and photoelectrochemical (PEC) routes. Furthermore, photochemical and electrochemical capabilities of these MOFs can be fine‐tuned to maximize their performance by modification in the bandgap, surface area, current density, electrochemical active surface area, and overpotential, through tailoring of the organic ligands and/or metal centers. A number of works have been dedicated to this quest resulting in promising and very effective results. Such as for photoelectrocatalysis, a composite nanorod array of TiO2/Co‐MOF acting as photoanode achieved one of the highest photocurrent densities of 2.93 mA/cm2 at 1.23 V (vs reverse hydrogen electrode [RHE]). In another study, MOF‐derived Co3C‐3/TiO2 photoanode attained the photocurrent density of 2.6 mA/cm2 at 1.23 V vs RHE. For electrocatalysis, Fe2O3/Ni‐MOF‐74 exhibited oxygen evolution reaction overpotential of 264 mV to reach 10 mA/cm2 of current density with a low Tafel plot of 48 mV/dec. Another novel material derived from MOF, MoO2‐PC‐rGO displayed a Tafel Plot of 41 mV/dec. Even though this field is in its infancy phase, it is attracting increased attention for promising results suggesting extraordinary potential for practical applications. Focus of this review article is on the overview of the development of MOFs for application in electrocatalytic and photoelectrocatalytic water‐splitting for hydrogen production. This review intends to provide a timely reference and insight for the advancement in catalysts based on MOFs for practical electrochemical and PEC water‐splitting in a clear and comprehensive manner. Starting with the brief introduction, fundamentals, factors affecting catalytic efficiency and evaluation parameters of water‐splitting are summarized followed by synthesis strategies and recent progress made by MOF‐based catalysts for PEC and electrochemical water‐splitting.

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“…Similarly, the Co 2p 1/2 region can be deconvoluted into three peaks at 793.2, 794.9 and 797 eV. The peaks at 778.3 and 793.2 eV are corresponding to the metal Co, while the other four peaks at 779.9, 782.1, 794.9 and 797 eV can be attributed to Co 2 + species [28] generated from the surface oxidation of Co nanoparticles. The two satellite peaks located at 785.9 and 802 eV are belonged to the shakeup excitation of the high-spin Co 2 + ions.…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Carbon Cloth Supported Nitrogen Doped Porous Carbon Wrapped Co Nanoparticles for Effective Overall Water Splitting

et al. 2021

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The key to the practical application of overall water splitting is to develop high-efficient non-noble metal electrocatalysts. Herein, carbon cloth supported N-doped porous carbon wrapped Co nanoparticles (CC@Co-NPC) are constructed with high bifunctional catalytic activity toward oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in alkaline medium. Benefiting from the exposure of abundant Co active sites, and the synergistic effect between Co particles and N-doped carbon species, the CC@Co-NPC delivers small overpotentials of 286 and 340 mV at 100 mA cm À 2 with Tafel values of 59 and 97 mV dec À 1 towards OER and HER, respectively.

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Assembled 3D MOF on 2D Nanosheets for Self-boosting Catalytic Synthesis of N-doped Carbon Nanotube Encapsulated Metallic Co Electrocatalysts for Overall Water Splitting

Cited by 144 publications

References 72 publications

Bio‐reduced GO /Pd nanocomposite as an efficient and green synthesized catalyst for hydrogen evolution reaction

Bio‐reduced GO /Pd nanocomposite as an efficient and green synthesized catalyst for hydrogen evolution reaction

Recent advancements in MOF‐ based catalysts for applications in electrochemical and photoelectrochemical water splitting: A review

Carbon Cloth Supported Nitrogen Doped Porous Carbon Wrapped Co Nanoparticles for Effective Overall Water Splitting

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