Metal–Organic Framework-Based Materials for Energy Conversion and Storage

Qiu, Tianjie; Liang, Zibin; Guo, Wenhan; Tabassum, Hassina; Gao, Song; Zou, Ruqiang

doi:10.1021/acsenergylett.9b02625

Cited by 340 publications

(197 citation statements)

References 110 publications

(214 reference statements)

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“…This renders them excellent materials for drug delivery, [ 6 ] gas storage and separation, [ 7 ] batteries, [ 8,9 ] and catalysis. [ 10–13 ] Thanks to their unique structural properties, transition metal‐based CPAs keep attracting broad interest in the field of heterogeneous electrocatalysts. [ 9a,b – 14 ] However, their intrinsic poor conductivity, low mass permeability, and confined active metal centers need to be systematically improved for their application as efficient electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Understanding and Optimizing Ultra‐Thin Coordination Polymer Derivatives with High Oxygen Evolution Performance

Zhao

Wan

Chen

et al. 2020

Advanced Energy Materials

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fuel shortage and climate change. [1] Noble metal-based materials (e.g., Pt and its alloys) have been well investigated and are among the most promising electrocatalysts for water splitting to generate clean hydrogen. [2,3] However, Pt group-based catalysts are still constrained by their scarcity and high cost for scalable and commercial electrocatalysis. Hence, the development of noble-metal-free catalysts with comparable catalytic activity and robust durability is an urgent task to realize technical applications of water electrolysis. [4,5] Coordination polymer assemblies (CPAs), which are composed of a metal center linked to organic or inorganic ligands combine tunable porous structures, well-dispersed metal sites, high surface areas, and good chemical stability. This renders them excellent materials for drug delivery, [6] gas storage and separation, [7] batteries, [8,9] and catalysis. [10-13] Thanks to their unique structural properties, transition metal-based CPAs keep attracting broad interest in the field of heterogeneous electrocatalysts. [9a,b-14] However, their intrinsic poor conductivity, low mass permeability, and confined active metal centers need to be systematically improved for their application as efficient electrocatalysts. Moreover, instability issues of the ligands such as self-oxidation or degradation at high oxidation potentials need to be resolved for directly using CPAs as long-term electrocatalysts. [14-17] Several strategies, for example, morphological modulation, electronic tuning, and surface modification, have been confirmed as promising approaches to improve the electrocatalytic performance of CPAs and CPs. [14,16-21] In a representative study, ultra-thin NiCo bimetallic CPA nanosheets with enhanced OER activity compared to bulk NiCo bimetallic CPAs, were synthesized through an ultrasonication exfoliation method. [14] Zhang et al. [16] demonstrated that monolayered heterogenous nanosheets of hybrid CoFeO x /CPAs were promising OER electrocatalysts. Some of us recently [20] proposed that the high and durable electrocatalytic activity of a new 1D cobalt coordination polymer (Co-dppeO 2) is due to its highly disordered structure, giving rise to exceptional resilience. Further theoretical calculations and in situ characterizations proved that the key architecture behind the high OER activity was arising from the {H 2 O-Co 2 (OH) 2-OH 2 } edge-site motifs. This study demonstrated the high potential of low-cost Engineering low-crystalline and ultra-thin nanostructures into coordination polymer assemblies is a promising strategy to design efficient electrocatalysts for energy conversion and storage. However, the rational utilization of coordination polymers (CPs) or their derivatives as electrocatalysts has been hindered by a lack of insight into their underlying catalytic mechanisms. Herein, a convenient approach is presented where a series of Ni 10-x Fe x-CPs (0 ≤ x ≤ 5) is first synthesized, followed by the introduction of abundant structural deficiencies using a facile reductive method ...

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Section: Introductionmentioning

confidence: 99%

Understanding and Optimizing Ultra‐Thin Coordination Polymer Derivatives with High Oxygen Evolution Performance

Zhao

Wan

Chen

et al. 2020

Advanced Energy Materials

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“…In contrast to other porous materials, MOFs also possess designable structures that can be engineered with tailored pores for selective adsorption of specific gases [1]. Moreover, MOFs show outstanding features as in structural flexibility, thermal and chemical stability, etc., which grant MOFs great potential in numerous applications, such as gas storage and separation [2][3][4][5], liquid purification [6][7][8][9], catalysis [10][11][12][13], gas/chemical sensing [14][15][16][17][18], and energy production [19][20][21][22]. Other than direct applications, MOFs have also been used as precursors/templates for the production of inorganic functional materials with unique designability [23].…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Framework Thin Films: Fabrication, Modification, and Patterning

Zhang

Chang

2020

Processes

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Metal–organic frameworks (MOFs) have been of great interest for their outstanding properties, such as large surface area, low density, tunable pore size and functionality, excellent structural flexibility, and good chemical stability. A significant advancement in the preparation of MOF thin films according to the needs of a variety of applications has been achieved in the past decades. Yet there is still high demand in advancing the understanding of the processes to realize more scalable, controllable, and greener synthesis. This review provides a summary of the current progress on the manufacturing of MOF thin films, including the various thin-film deposition processes, the approaches to modify the MOF structure and pore functionality, and the means to prepare patterned MOF thin films. The suitability of different synthesis techniques under various processing environments is analyzed. Finally, we discuss opportunities for future development in the manufacturing of MOF thin films.

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“…Electrocatalysis has been perceived as one of the cleanest and the most renewable strategies to mitigate environmental issues and energy shortage problems [48][49][50] . More recently, conductive MOFs have been widely investigated as catalysts for electrocatalytic application 10,51 .…”

Section: Introductionmentioning

confidence: 99%

Conductive Metal-Organic Frameworks for Electrocatalysis：Achievements, Challenges, and Opportunities

Gao¹,

Wang²,

Li³

et al. 2020

Acta Physico Chimica Sinica

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To fulfill the demands of green and sustainable energy, the production of novel catalysts for different energy conversion processes is critical. Owing to the intriguing advantages of the intrinsic active species, tunable crystal structure, remarkable chemical and physical properties, and good stability, metal-organic frameworks (MOFs) have been extensively investigated in various electrochemical energy conversions, such as the CO2 reduction reaction, N2 reduction reaction, oxygen evolution reaction, hydrogen evolution reaction, and oxygen reduction reaction. More importantly, it is feasible to change the chemical environments, pore sizes, and porosity of MOFs, which will theoretically facilitate the diffusion of reactants across the open porous networks, thereby improving the electrocatalytic performance. However, owing to the high energy barriers of charge transfer and limited free charge carriers, most MOFs show poor electrical conductivity, thus limiting their diverse applications. As reported previously, MOFs were used as a porous substrate to confine the growth of nanoparticles or co-doped electrocatalysts after annealing. The conductive MOFs can combine the advantages of conventional MOFs with electronic conductivity, which significantly enhance the electrocatalytic performance. In addition, conductive MOFs can achieve conductivity via electronic or ionic routes without post-annealing treatment, thereby extending their potential applications. Different synthesis strategies have recently been developed to endow MOFs with electrical conductivity, such as post-synthesis modification, guest molecule introduction, and composite formatting. The performance of conductive MOFs can even outperform those of commercial RuO2 catalysts or Pt-group catalysts. However, it is difficult to endow most MOFs with high conductivity. This review summarizes the mechanisms of constructing conductive MOFs, such as redox hopping, through-bond pathways, through-space pathways, extended conjugation, and guest-promoted transport. Synthetic methods, including hydro/solvothermal synthesis and interface-assisted synthesis, are introduced. Recent advances in the use of conductive MOFs as heterogeneous catalysts in electrocatalysis have been comprehensively elucidated. It has been reported that conductive MOFs can demonstrate considerable catalytic activity, selectivity, and stability in different electrochemical reactions, revealing the immense potential for future displacement of Pt-group catalysts. Finally, the challenges and opportunities of conductive MOFs in electrocatalysis are discussed. Based on systematic synthesis strategies, more conductive MOFs can be constructed for electrocatalytic reactions. In addition, the morphology and structure of conductive MOFs, which can change the electrochemical accessibility between substrates and MOFs, are also crucial for catalysis, and thus, they should be extensively studied in the future. It is believed that a breakthrough for high-performance conductive MOF-based electrocatalysts could be ac...

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Metal–Organic Framework-Based Materials for Energy Conversion and Storage

Cited by 340 publications

References 110 publications

Understanding and Optimizing Ultra‐Thin Coordination Polymer Derivatives with High Oxygen Evolution Performance

Understanding and Optimizing Ultra‐Thin Coordination Polymer Derivatives with High Oxygen Evolution Performance

Metal–Organic Framework Thin Films: Fabrication, Modification, and Patterning

Conductive Metal-Organic Frameworks for Electrocatalysis：Achievements, Challenges, and Opportunities

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