Hollow bimetallic cobalt-based selenide polyhedrons derived from metal–organic framework: an efficient bifunctional electrocatalyst for overall water splitting

Wang, Xiang; Li, Feng; Li, Wenzhu; Gao, Wenbing; Tang, Yu; Li, Rong

doi:10.1039/c7ta03167j

Cited by 140 publications

(87 citation statements)

References 48 publications

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“…As displayed in Figure a, MoO 2 P x NSs/P‐MWCNTs exhibits a sharp onset of HER current (−27 mV), while the other catalysts afford both obviously lower onset potentials and slower HER current densities at all potentials except Pt/C. In addition, the over‐potential at 10 mA cm −2 is another criterion to estimate the electrocatalytic activity of materials . As shown in Figure S7 and Table S1, the over‐potential of MoO 2 P x NSs/P‐MWCNTs is only 57 mV at 10 mA cm −2 , which is the smallest among all the catalysts except Pt/C (35 mV for Pt/C, 332 mV for P‐MoO 2 , 406 mV for P‐MWCNTs, 537 mV for MoO 2 , and 686 mV for MWCNTs).…”

Section: Resultsmentioning

confidence: 99%

Phosphorus Dual‐Doped MoO₂ Nanosheet/Multiwalled Carbon Nanotube Hybrid as Efficient Electrocatalyst for Hydrogen Evolution

Tian

et al. 2018

ChemElectroChem

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Highly efficient and precious metal free catalysts for the hydrogen evolution reaction (HER) are of vital importance for renewable energy technologies. Nevertheless, developing simple methods for the synthesis of highly active and super‐durable electrocatalysts at low cost for HER still remains a major challenge. In this work, high temperature pyrolysis of (NH4)6Mo7O24 ⋅ 4H2O, NaH2PO4 and multi‐walled carbon nanotubes (MWCNTs) in Ar atmosphere is carried out to obtain phosphorus dually doped MoO2 nanosheets (MoO2 NSs) and MWCNTs hybrids (MoO2Px NSs/P‐MWCNTs), which can serve as excellent electrocatalyst for HER. In 0.5 M H2SO4, the hybrid material catalyzes HER with an onset potential of −27 mV (vs. reversible hydrogen electrode, RHE), Tafel slope of 45 mV dec−1, and an overpotential at 10 mA cm−2 of only 57 mV. Additionally, it displays favorable stability over 50 h in acidic media.

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Section: Resultsmentioning

confidence: 99%

Phosphorus Dual‐Doped MoO₂ Nanosheet/Multiwalled Carbon Nanotube Hybrid as Efficient Electrocatalyst for Hydrogen Evolution

Tian

et al. 2018

ChemElectroChem

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“…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

366

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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...

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“…As shown in Fig. 4b [49][50][51] In addition to catalytic activity, stability is another critical factor to evaluate a good electrocatalyst, we investigated the stability of Co-FeS 2 /CoS 2 heterostructures via 1000 cycles scanning. As shown in Fig.…”

Section: -25mentioning

confidence: 99%

Hierarchical Co–FeS₂/CoS₂ heterostructures as a superior bifunctional electrocatalyst

Guo

Yan

et al. 2018

RSC Adv.

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The traditional method of preparing hydrogen and oxygen as efficient clean energy sources mainly relies on the use of platinum, palladium, and other precious metals. However, the high cost and low abundance limit wide application of such metals. As such, one challenging issue is the development of low-cost and highefficiency electrocatalysts for such purposes. In this study, we synthesized Co-FeS 2 /CoS 2 heterostructures via a hydrothermal method for efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Benefitting from their unique three-dimensional hierarchical nanostructures, Co-doped FeS 2 , and CoS 2 formed heterostructures on Co-FeS 2 petals, which bestowed remarkable electrocatalytic properties upon Co-FeS 2 /CoS 2 nanostructures. Co-FeS 2 /CoS 2 effectively catalyzed the OER with an overpotential of 278 mV at a current density of 10 mA cm À2 in 1 M KOH solution, and also is capable of driving a current density À10 mA cm À2 at an overpotential of À103 mV in 0.5 M H 2 SO 4 solution. The overpotential of the OER and HER only decreased by 5 mV and 3 mV after 1000 cycles. Our Co-FeS 2 / CoS 2 materials may offer a promising alternative to noble metal-based electrocatalysts for water splitting.

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Hollow bimetallic cobalt-based selenide polyhedrons derived from metal–organic framework: an efficient bifunctional electrocatalyst for overall water splitting

Abstract: Hollow bimetallic cobalt-based selenide polyhedrons MxCo1−xSe2 were successfully synthesized by a simple solvothermal strategy using bimetallic MOFs as template. This catalyst exhibits excellent electrocatalytic performance for overall water splitting.

Cited by 140 publications

References 48 publications

Phosphorus Dual‐Doped MoO₂ Nanosheet/Multiwalled Carbon Nanotube Hybrid as Efficient Electrocatalyst for Hydrogen Evolution

Phosphorus Dual‐Doped MoO₂ Nanosheet/Multiwalled Carbon Nanotube Hybrid as Efficient Electrocatalyst for Hydrogen Evolution

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Hierarchical Co–FeS₂/CoS₂ heterostructures as a superior bifunctional electrocatalyst

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Hollow bimetallic cobalt-based selenide polyhedrons derived from metal–organic framework: an efficient bifunctional electrocatalyst for overall water splitting

Abstract: Hollow bimetallic cobalt-based selenide polyhedrons MxCo1−xSe2 were successfully synthesized by a simple solvothermal strategy using bimetallic MOFs as template. This catalyst exhibits excellent electrocatalytic performance for overall water splitting.

Cited by 140 publications

References 48 publications

Phosphorus Dual‐Doped MoO2 Nanosheet/Multiwalled Carbon Nanotube Hybrid as Efficient Electrocatalyst for Hydrogen Evolution

Phosphorus Dual‐Doped MoO2 Nanosheet/Multiwalled Carbon Nanotube Hybrid as Efficient Electrocatalyst for Hydrogen Evolution

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Hierarchical Co–FeS2/CoS2 heterostructures as a superior bifunctional electrocatalyst

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Phosphorus Dual‐Doped MoO₂ Nanosheet/Multiwalled Carbon Nanotube Hybrid as Efficient Electrocatalyst for Hydrogen Evolution

Phosphorus Dual‐Doped MoO₂ Nanosheet/Multiwalled Carbon Nanotube Hybrid as Efficient Electrocatalyst for Hydrogen Evolution

Hierarchical Co–FeS₂/CoS₂ heterostructures as a superior bifunctional electrocatalyst