In situ coupling of Co<sub>0.85</sub>Se and N-doped carbon via one-step selenization of metal–organic frameworks as a trifunctional catalyst for overall water splitting and Zn–air batteries

Meng, Tao; Qin, Jinwen; Wang, Shuguang; Zhao, Di; Mao, Baoguang; Cao, Minhua

doi:10.1039/c7ta01453h

Cited by 210 publications

(154 citation statements)

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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%

“…[59] It is one of the most frequently studied MOF precursors for the syntheses of metal oxides, phosphides, sulfides, and metal-doped carbon composites. [62] Similar to You's work, ZIF-67 is applied as both precursor and template, which leads to a porous carbon network with encapsulated Co 0.85 Se nanocrystals. It is processed by thermal annealing and hydrothermal reactions with thioacetamide and nickel nitrate hexahydrate.…”

Section: Tunable Catalytical Metal Active Sitesmentioning

confidence: 88%

“…It is processed by thermal annealing and hydrothermal reactions with thioacetamide and nickel nitrate hexahydrate. [62] The M-N-C structure usually results in the charge redistribution at the metallic sites, rendering them more catalytically active. You et al reported the derivation of CoP and Co 2 P nanoparticles in N-doped carbon composites from ZIF-67 through direct carbonization followed by phosphorization for electrocatalytic water splitting.…”

Section: Tunable Catalytical Metal Active Sitesmentioning

confidence: 99%

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Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Zhu

Zou

2018

Advanced Energy Materials

405

213

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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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Section: Overall Water Splittingmentioning

confidence: 86%

Section: Tunable Catalytical Metal Active Sitesmentioning

confidence: 88%

Section: Tunable Catalytical Metal Active Sitesmentioning

confidence: 99%

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Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Zhu

Zou

2018

Advanced Energy Materials

405

213

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Section: Discussionmentioning

confidence: 99%

“…To tackle these problems, it is urgent to look for new materials to improve performance. [183] Schematic illustrations of the preparation procedure for Co 0.85 Se@NC are shown in Figure 13c. Doping heteroatoms can also further improve catalytic activity.…”

Section: Zn-air Batteriesmentioning

confidence: 99%

Metal‐Organic Framework‐Derived Carbons for Battery Applications

Zheng

Jin

et al. 2018

Advanced Energy Materials

197

112

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batteries, sodium-selenium (Na-Se) batteries, Li-tellurium (Li-Te) batteries, and Na-S batteries) have their own distinctive applications due to their various characteristics. To explore new materials with high performance, large studies have been devoted to the development of nextgeneration batteries.Porous carbon (PC) materials possess many unique properties due to their large surface areas, high conductivity, large pore volumes, high thermal stability, and surface functionalities, [22][23][24] leading to their wide use in energy storage and conversion. Traditionally, PC can be obtained via various methods, such as the direct heat treatment of organic precursors, hard template or nanocast methods, and soft template methods. However, the production of PC from these methods cannot be scaled-up because of certain barriers (disordered structure with wide size distributions, complicated processes, etc.). [23,25,26] Metal-organic frameworks (MOFs) have drawn wide research interest as a novel class of porous materials that are crystalline materials consisting of metal ions and organic ligands. [4,21,[27][28][29][30][31] Since the report on the MOF-templated synthesis of PC in 2008, [32] a large number of studies have been reported on the use of MOFs as suitable precursors/templates for carbon synthesis. [22,26,[33][34][35] At present, a large number of studies indicate that zeolitic imidazolate framework-8 (ZIF-8), MOF-5, MIL-125 (Ti) (MIL = Materials of Institute Lavoisier), and ZIF-67 with excellent thermal stability and unique porous structures are the more commonly used MOF precursors (Scheme 1). [3,36,37] All of them, ZIF-8, possessing nitrogen-containing ligands, has high porosity and thermal stability. [38][39][40] MOF-5 possesses excellent thermal stability, high porosity, and so on. [41] MIL-125, an active photocatalyst, includes cyclic octamers of TiO 2 octahedra. [42,43] ZIF-67 has a tunable pore aperture, highly stable structure, and catalytic activity. [37,44,45] The above-mentioned MOFs have been widely used for gas adsorption, molecular separation, catalysis, batteries, supercapacitors, and so on. [13,14,33] Moreover, carbon hybrids containing nanostructured metal species (e.g., metal oxides (MOs)) are likely to form under in situ carbonization conditions. [46] Compared with the carbonaceous materials from conventional precursors, MOF-derived carbon materials have significant advantages with high specific surface areas, tailorable porosities, unique morphologies, and easy functionalization with other heteroatoms. [14,23,31] For example, Xu and co-workers [47] obtained 1D carbon nanorods via the pyrolysis The applications of carbon and carbon-based materials with high porosity, high surface area, and functionalities based on metal-organic framework precursors and/or templates have attracted significant research interest in recent years, particularly in the field of batteries. The chemical and physical properties of carbon and carbon-based materials obtained by the heat treatment of various metal-organic ...

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A Review of Precious‐Metal‐Free Bifunctional Oxygen Electrocatalysts: Rational Design and Applications in Zn−Air Batteries

Wang

Tang

Zhang

2018

Adv Funct Materials

586

327

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The bifunctional electrocatalysis of oxygen reduction reactions (ORRs) and oxygen evolution reactions (OERs) is critical for the development of rechargeable Zn-air batteries. Both ORRs and OERs suffer from sluggish kinetics and high overpotentials, and the bifunctional reactivity is limited by the scaling relationship. Therefore, smart designs on electrocatalysts are requested to achieve high bifunctional ORR/OER activity and excellent performance in Zn-air batteries. Herein, the requirements for bifunctional oxygen electrocatalysts are first introduced. Then the recent advances of precious-metal-free active materials and regulation methods of their intrinsic activity are introduced. The structural design principles to improve the accessibility of the active sites are further presented. Finally, a brief overview of the applications of bifunctional oxygen electrocatalysts in Zn-air batteries, including routine liquid batteries and flexible solid-state batteries, is presented. This review affords rational design principles and strategies for nonprecious bifunctional ORR/OER electrocatalysts, which are expected to guide the targeted optimization of electrocatalysts and further exploration of emerging candidates.The electrochemical tests of ORR and ORR are usually performed in a three-electrode system. O 2 -saturated 0.10 or 1.0 m KOH Adv. Funct. Mater. 2018, 28, 1803329 Figure 2. Schematic illustration of how the scaling relationship affect the ORR and OER volcano plots. All panels reproduced with permission. [35]

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In situ coupling of Co_0.85Se and N-doped carbon via one-step selenization of metal–organic frameworks as a trifunctional catalyst for overall water splitting and Zn–air batteries

Abstract: Co0.85Se@NC obtained by directly selenizing ZIF-67 can be used as a trifunctional catalyst for water splitting and Zn–air batteries.

Cited by 210 publications

References 56 publications

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Metal‐Organic Framework‐Derived Carbons for Battery Applications

A Review of Precious‐Metal‐Free Bifunctional Oxygen Electrocatalysts: Rational Design and Applications in Zn−Air Batteries

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In situ coupling of Co0.85Se and N-doped carbon via one-step selenization of metal–organic frameworks as a trifunctional catalyst for overall water splitting and Zn–air batteries

Abstract: Co0.85Se@NC obtained by directly selenizing ZIF-67 can be used as a trifunctional catalyst for water splitting and Zn–air batteries.

Cited by 210 publications

References 56 publications

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Metal‐Organic Framework‐Derived Carbons for Battery Applications

A Review of Precious‐Metal‐Free Bifunctional Oxygen Electrocatalysts: Rational Design and Applications in Zn−Air Batteries

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In situ coupling of Co_0.85Se and N-doped carbon via one-step selenization of metal–organic frameworks as a trifunctional catalyst for overall water splitting and Zn–air batteries