g-C<sub>3</sub>N<sub>4</sub> promoted MOF derived hollow carbon nanopolyhedra doped with high density/fraction of single Fe atoms as an ultra-high performance non-precious catalyst towards acidic ORR and PEM fuel cells

Deng, Yijie; Chi, Bin; Tian, Xinlong; Cui, Zhiming; Liu, Ershuai; Jia, Qingying; Fan, Wenjun; Wang, Guanghua; Dang, Dai; Li, Minsi; Zang, Ketao; Luo, Jun; Hu, Yongfeng; Liao, Shijun; Sun, Xueliang; Mukerjee, Sanjeev

doi:10.1039/c8ta11785c

Cited by 157 publications

(93 citation statements)

References 63 publications

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“…They are not limited to specific equipment. For example, to realize spatial confinement of single atoms, pyrolysis [ 30 ] or wet‐impregnation [ 31 ] can either be utilized. And Section 2.2 is based on the development of techniques recently, requiring for specific apparatus.…”

Section: Synthesis Of Single‐atom Catalytic Materialsmentioning

confidence: 99%

“…Deng et al recently reported a hollow carbon polyhedra codoped with single iron atoms and nitrogen, using hollow ZIF‐8 (HZ8) and ferric acetylacetonate as precursors. [ 30 ] The precursors (FeHZ8) were stirred in methanol, followed by pyrolysis with g‐C 3 N 4 (g‐C 3 N 4 /FeHZ8 = 7.35, 950 °C, Ar, 3 h). After leaching with 0.5 m H 2 SO 4 and washing with deionized water, the mixture was pyrolyzed again for graphitization to obtain the final sample C‐FeHZ8@ g‐C 3 N 4 ‐950 with a high Fe content of 3.17 wt%.…”

Section: Synthesis Of Single‐atom Catalytic Materialsmentioning

confidence: 99%

Section: Synthesis Of Single‐atom Catalytic Materialsmentioning

confidence: 99%

“…As discussed before, the spatial confinement strategy usually includes pyrolysis process to form minicages. [ 30,34 ] This method can be applied to achieve defect engineering strategy [ 48 ] and coordination design strategy. [ 66 ] Nevertheless, the coordination environment of single‐atom active sites is dependent on the heating temperature, indicating that an optimal control of pyrolysis conditions should be realized.…”

Section: Synthesis Of Single‐atom Catalytic Materialsmentioning

confidence: 99%

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Single‐Atom Catalytic Materials for Advanced Battery Systems

2020

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power and energy densities are the imperative units for these cutting-edge energy harvesting and storage. [3] The state-ofthe-art commercial batteries are prepared with graphite anodes and lithium transition-metal oxide cathodes that reversibly intercalate lithium (Li) ions with moderate stability and energy densities. [4] The intrinsic physicochemical properties and ion insertion mechanisms of conventional materials limits the energy capacity of devices, which will not be quantified for unprecedented demand of modern electronics. [5] Other than the insertiontype electrode materials, there exist some conversion-type electrode materials with higher energy storage capability and faster electrochemical conversion dynamics, including transition-metal dichalcogenide (TMD) and silicon materials. [6] TMD materials demonstrate strong chemical interaction and high catalytic effect with active species in batteries, which is critical to suppress shuttle effects and promote conversion kinetics. [7] But lithiation of TMD materials inevitably gives rise to phase transformation and causes severe damage for the structural integrity of electrodes. [8] Silicon materials emerge as promising conversion-type substitute in recent years due to the high theoretical capacity of 4200 mAh g −1 , but silicon materials exit severe volume expansion effect in conversion processes, which will lead to rapid capacity degradation within several cycles. [9] These two typical conversion-type materials are both semiconductor materials with poor conductivity and unsatisfactory structural stability under electrochemical conditions. Construction of composition architectures with carbon materials is a common strategy to address these drawbacks for purpose of increasing conductivity and maintaining structural integrity. [10] Even if some synthetic methods have been deliberately considered and rationally designed, their attractive theoretical capacities have not fully expressed with long-term cycling performances. Thus, novel battery chemistries other than traditional insertion and conversion-type electrode materials need to be developed to address these issues.With the ever-increasing development of material science and engineering, lots of alternative materials with high energy capacities and stabilities have stood out as the electrode materials from the competition with conventional counterparts. For instance, sulfur material-based batteries gives high theoretical Advanced battery systems with high energy density have attracted enormous research enthusiasm with potential for portable electronics, electrical vehicles, and grid-scale systems. To enhance the performance of conversiontype batteries, various catalytic materials are developed, including metals and transition-metal dichalcogenides (TMDs). Metals are highly conductive with catalytic effects, but bulk structures with low surface area result in low atom utilization, and high chemical reactivity induces unfavorable dendrite effects. TMDs present chemical adsorption with active species and ...

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Section: Synthesis Of Single‐atom Catalytic Materialsmentioning

confidence: 99%

Section: Synthesis Of Single‐atom Catalytic Materialsmentioning

confidence: 99%

Section: Synthesis Of Single‐atom Catalytic Materialsmentioning

confidence: 99%

Section: Synthesis Of Single‐atom Catalytic Materialsmentioning

confidence: 99%

See 2 more Smart Citations

Single‐Atom Catalytic Materials for Advanced Battery Systems

2020

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“…As a kind of inorganic-organic hybrid material with a certain crystal structure, MOFs are mainly used in gas storage, gas separation, magnetic materials and reaction catalysis (Makiura et al, 2010 ; Shah et al, 2013 ; Knebel et al, 2018 ; Luo et al, 2018 ; Deng et al, 2019b ; Feng et al, 2019 ). In recent years, modification of PEMs with metal-organic frameworks (MOFs) has been intensively studied (Furukawa et al, 2014 ; Shiqiang et al, 2016 ; Luo et al, 2017 ; Shaari et al, 2018 ; Cai et al, 2019 ; Deng et al, 2019c ; Wang et al, 2019 ). It is found that the open framework structure of MOFs improved the performance of the composite membrane by loading particles with special functions into the matrix as proton carriers (Pardo et al, 2011 ; Dybtsev et al, 2014 ; Díaz-Duran and Roncaroli, 2017 ; Liu et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Metal Organic Frameworks Modified Proton Exchange Membranes for Fuel Cells

Liu

Wang

et al. 2020

Front. Chem.

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Proton exchange membrane fuel cells (PEMFCs) have received considerable interest due to their low operating temperature and high energy conversion rate. However, their practical implement suffers from significant performance challenge. In particular, proton exchange membrane (PEM) as the core component of PEMFCs, have shown a strong correlation between its properties (e.g., proton conductivity, dimensional stability) and the performance of fuel cells. Metal-organic frameworks (MOFs) as porous inorganic-organic hybrid materials have attracted extensive attention in gas storage, gas separation and reaction catalysis. Recently, the MOFs-modified PEMs have shown outstanding performance, which have great merit in commercial application. This manuscript presents an overview of the recent progress in the modification of PEMs with MOFs, with a special focus on the modification mechanism of MOFs on the properties of composite membranes. The characteristics of different types of MOFs in modified application were summarized.

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The Advancement of Catalysts for Proton‐Exchange Membrane Fuel Cells

Cheng,

Wang

2024

Water Photo‐ and Electro‐Catalysis

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g-C₃N₄ promoted MOF derived hollow carbon nanopolyhedra doped with high density/fraction of single Fe atoms as an ultra-high performance non-precious catalyst towards acidic ORR and PEM fuel cells

Abstract: Atomic Fe-doped hollow carbon nanopolyhedra as efficient ORR catalysts.

Cited by 157 publications

References 63 publications

Single‐Atom Catalytic Materials for Advanced Battery Systems

Single‐Atom Catalytic Materials for Advanced Battery Systems

Metal Organic Frameworks Modified Proton Exchange Membranes for Fuel Cells

The Advancement of Catalysts for Proton‐Exchange Membrane Fuel Cells

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g-C3N4 promoted MOF derived hollow carbon nanopolyhedra doped with high density/fraction of single Fe atoms as an ultra-high performance non-precious catalyst towards acidic ORR and PEM fuel cells

Abstract: Atomic Fe-doped hollow carbon nanopolyhedra as efficient ORR catalysts.

Cited by 157 publications

References 63 publications

Single‐Atom Catalytic Materials for Advanced Battery Systems

Single‐Atom Catalytic Materials for Advanced Battery Systems

Metal Organic Frameworks Modified Proton Exchange Membranes for Fuel Cells

The Advancement of Catalysts for Proton‐Exchange Membrane Fuel Cells

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Product

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g-C₃N₄ promoted MOF derived hollow carbon nanopolyhedra doped with high density/fraction of single Fe atoms as an ultra-high performance non-precious catalyst towards acidic ORR and PEM fuel cells