A cobalt-based hybrid electrocatalyst derived from a carbon nanotube inserted metal–organic framework for efficient water-splitting

Yang, Fulin; Zhao, Pingping; Hua, Xing; Luo, Wei; Wang, Xing; Chen, Shengli

doi:10.1039/c6ta05829a

Cited by 155 publications

(96 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang and et al synthesized an actiniae-like carbon nanotube assembly (3D-CNTA) as a catalyst for electrocatalytic water splitting, which is also derived from ZIF-67. The water electrolyzer also exhibits stable performance under the operating cell voltage 1.68 V for 10 h. Besides the above two examples, there are also reported works on ZIF-67-derived CoP x /carbon composites, [61,109,110] CoSe x / carbon composites, [51,62,[111][112][113] CoS x /carbon composites, [114] cobalt-doped carbon nanotubes, [115][116][117] and other Co-doped carbon matrices. carbon core-shell particles on the tips of the nanotubes (see Figure 10).…”

Section: Overall Water Splittingmentioning

confidence: 86%

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Zhu

Zou

2018

Advanced Energy Materials

385

199

View full text Add to dashboard Cite

society is still heavily relying on chemical fuels. Therefore, the essential and realistic approaches to environmental and energy issues remain to be the exploration of clean and sustainable energy sources, in order to meet the ever-increasing energy demand. Thanks to its high energy density and environmental friendliness, hydrogen fuel comes into play as a muchanticipated new energy carrier, which is under intensive studies in the academic field. [4] Furthermore, we are already in the new era witnessing the transformation of hydrogen-powered technologies from science fictions to realities. UK is already in the process of replacing their traditional diesel-powered double decker buses with the hydrogen-powered version, which aims to phase out the former by 2018. [5] China announced its world's first hydrogen-powered tram, which was put into business service in the latter half of 2017. [6] Mercedes-Benz had even started its development of personal hydrogen-powered car, and Toyota had commercialized its hydrogen fuel-cell car branded "Mirai." [7,8] However, one critical issue remains to be the conflict between the hydrogen production efficiency and the demand for the mass distribution of hydrogen-powered technologies.Current industrial hydrogen production methods include coal gasification (followed by water-gas shift reaction), steam reforming, cryogenic distillation, and water splitting. [9] Coal gasification and steam reforming utilize the reaction between conventional fossil fuels and water to produce syngas (primarily CO and H 2 ) or CO 2 and H 2 mixture. However, both reactions require high temperatures (can be over 1000 °C) and pressures, which is an energy intensive process and has strict requirements on infrastructures. [10] The reaction products also need to be further separated to obtain relatively high-concentration of hydrogen. Cryogenic distillation takes the advantage of difference in gas boiling points, which can be applied to separate hydrogen from other gas components in the former two hydrogen production methods. However, cryogenic distillation is also an energy intensive process for low-temperature gas liquification. In comparison, hydrogen evolution reaction (HER) through water splitting is much-favored because of the following three prominent advantages: 1) Water splitting can be carried out at room temperature and ambient pressure, which is less restricted by infrastructure requirements. 2) Oxygen and hydrogen can be produced separately or selectively, which eliminate the need for gas separation. 3) Both the hydrogen source Highly efficient hydrogen evolution reactions (HERs) will determine the mass distributions of hydrogen-powered clean technologies in the future. Metal-organic frameworks (MOFs) are emerging as a class of crystalline porous materials. Along with their derivatives, MOFs have recently been under intense study for their applications in various hydrogen production techniques. MOF-based materials possess unique advantages, such as high specific surface area, crystalline porous str...

show abstract

Section: Overall Water Splittingmentioning

confidence: 86%

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Zhu

Zou

2018

Advanced Energy Materials

385

199

View full text Add to dashboard Cite

show abstract

“…The high-resolution C1ss pectrum of Co@NC can be divided into four peaks attributed to CÀC/C=C( binding energy;B E = 284.71 eV), C=N( BE = 285.49 eV), CÀN( BE = 287.18 eV), and CÀO( BE = 288.69 eV;F igure 2d). [18,31] The XPS results indicate that the Co nanoparticles embedded in N-doped graphiticc arbon layers have astronge lectronic interaction with Ca nd Na toms, which results in an excellent catalytic activity for electrocatalytic HER. [30] The deconvoluted Co 2p spectrum of Co@NC shows seven peaks ( Figure 2f).…”

Section: Resultsmentioning

confidence: 99%

Modified Graphitic Carbon Nitride Nanosheets for Efficient Photocatalytic Hydrogen Evolution

et al. 2019

View full text Add to dashboard Cite

Considerable research efforts have been devoted to develop noble‐metal‐free cocatalysts coupled with semiconductors for highly efficient photocatalytic H2 evolution as part of the challenge toward solar‐to‐fuel conversion. Herein, a new cocatalyst with excellent activity in the electrocatalytic H2 evolution reaction (HER) that is based on Co sheathed in N‐doped graphitic carbon nanosheets (Co@NC) was fabricated by a surfactant‐assisted pyrolysis approach and then coupled with g‐C3N4 nanosheets to construct a 2 D‐2 D g‐C3N4/Co@NC composite photocatalyst by a simple grinding method. As a result of advantages in effective electrocatalytic HER activity, suitable electronic band structure, and rapid interfacial charge transfer brought about by the 2 D‐2 D spatial configuration, the g‐C3N4/Co@NC photocatalyst that contained 4 wt % Co@NC presented a high photocatalytic H2 generation rate of 15.67 μmol h−1 under visible‐light irradiation (λ≥400 nm), which was 104.5 times higher than that of pristine g‐C3N4. The optimum g‐C3N4/Co@NC photocatalyst showed a high apparent quantum efficiency of 10.82 % at λ=400 nm.

show abstract

“…Ag(NO 3 ) 2 aqueous solution was then used to introduce Ag particles in this composite, finally obtaining Ag–Co 3 O 4 –NC/CNTs composite, which exhibited a power density of 88.9 mW cm −2 at current density of 140 mA cm −2 , even better than commercial 20% Pt/C for Mg–air fuel cell. Chen and co‐workers also employed this Zif‐67/CNTs composite as precursor . However, there is a little difference in the subsequent treatment process, during which the ZIF‐67/CNTs was annealed in N 2 atmosphere at 700, 800, and 900 °C for 2 h, finally obtaining Co‐NC/CNTs composite.…”

Section: Mof Composites With Carbon‐based Materialsmentioning

confidence: 99%

Rational Microstructure Design on Metal–Organic Framework Composites for Better Electrochemical Performances: Design Principle, Synthetic Strategy, and Promotion Mechanism

et al. 2020

Small Methods

View full text Add to dashboard Cite

Metal–organic frameworks (MOFs) simultaneously containing metal ions and organic ligands have recently shown great potential for application in energy storage and conversion fields due to their controllable conversion into carbon materials or various metal species, which often exhibit superior electrochemical performance as electrode materials for energy storage and conversion. Nevertheless, the electrochemical energy storage performance of MOF derivatives can still be further enhanced through building composites with other functional materials. It is of great significance in developing new strategies of fabricating MOF composites to achieve electrode materials with improved charge transfer and electrochemical redox reaction kinetics. In this review, the novel design and strategies of MOF composites with various functional components are focused on, including carbon‐based materials (carbon nanotubes, graphene, etc.), metal oxides, 3D conductive substrates, polymeric materials, and the second MOFs and metal salts, especially their derivatives for energy storage and conversion fields. The key factors for controllable synthesis of various MOF composites and electrochemical performance enhancement mechanisms are discussed in detail. It is expected that this review will provide new inspiration for the development of MOF derivatives for energy storage and conversion.

show abstract

A cobalt-based hybrid electrocatalyst derived from a carbon nanotube inserted metal–organic framework for efficient water-splitting

Cited by 155 publications

References 48 publications

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Modified Graphitic Carbon Nitride Nanosheets for Efficient Photocatalytic Hydrogen Evolution

Rational Microstructure Design on Metal–Organic Framework Composites for Better Electrochemical Performances: Design Principle, Synthetic Strategy, and Promotion Mechanism

Contact Info

Product

Resources

About