Metal–Organic Framework-Based Hierarchically Porous Materials: Synthesis and Applications

Chemical Reviews, Год журнала: 2021, Номер 121(20), С. 12278 - 12326

Опубликована: Июль 19, 2021

Metal-organic frameworks (MOFs) have been widely recognized as one of the most fascinating classes materials from science and engineering perspectives, benefiting their high porosity well-defined tailored structures components at atomic level. Although intrinsic micropores endow size-selective capability surface area, etc., narrow pores limit applications toward diffusion-control large-size species involved processes. In recent years, construction hierarchically porous MOFs (HP-MOFs), MOF-based composites, derivatives has captured widespread interest to extend conventional materials. this Review, advances in design, synthesis, functional are summarized. Their structural characters various applications, including catalysis, gas storage separation, air filtration, sewage treatment, sensing energy storage, demonstrated with typical reports. The comparison HP-MOFs traditional (e.g., zeolite, silica, carbons, metal oxides, polymers), subsisting challenges, well future directions research field, also indicated.

Язык: Английский

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Electromagnetic absorption materials: Current progress and new frontiers

Progress in Materials Science, Год журнала: 2022, Номер 127, С. 100946 - 100946

Опубликована: Март 17, 2022

Язык: Английский

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Self‐Supported Electrocatalysts for Practical Water Electrolysis

Advanced Energy Materials, Год журнала: 2021, Номер 11(39)

Опубликована: Сен. 1, 2021

Abstract Over the years, significant advances have been made to boost efficiency of water splitting by carefully designing economic electrocatalysts with augmented conductivity, more accessible active sites, and high intrinsic activity in laboratory test conditions. However, it remains a challenge develop earth‐abundant catalysts that can satisfy demands practical electrolysis, is, outstanding all‐pH electrolyte capacity, direct seawater ability, exceptional performance for overall splitting, superior large‐current‐density activity, robust long‐term durability. In this context, considering features increased species loading, rapid charge, mass transfer, strong affinity between catalytic components substrates, easily‐controlled wettability, as well as, enhanced bifunctional performance, self‐supported are presently projected be most suitable contenders massive scale hydrogen generation. review, comprehensive introduction design fabrication an emphasis on deposited nanostructured catalysts, selection various methods provided. Thereafter, recent development promising applications is reviewed from aforementioned aspects. Finally, brief conclusion delivered challenges perspectives relating promotion sustainable large‐scale production discussed.

Язык: Английский

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Designing High‐Valence Metal Sites for Electrochemical Water Splitting

Advanced Functional Materials, Год журнала: 2021, Номер 31(16)

Опубликована: Фев. 17, 2021

Abstract Electrochemical water splitting is a critical energy conversion process for producing clean and sustainable hydrogen; this relies on low‐cost, highly active, durable oxygen evolution reaction/hydrogen reaction electrocatalysts. Metal cations (including transition metal noble cations), particularly high‐valence that show high catalytic activity can serve as the main active sites in electrochemical processes, have received special attention developing advanced In review, heterogenous electrocatalyst design strategies based are presented, associated materials designed summarized. discussion, emphasis given to combined with modulation of phase/electronic/defect structure performance improvement. Specifically, importance using situ operando techniques track real metal‐based during highlighted. Remaining challenges future research directions also proposed. It expected comprehensive discussion electrocatalysts containing be instructive further explore other energy‐related reactions.

Язык: Английский

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Atomic heterointerface engineering overcomes the activity limitation of electrocatalysts and promises highly-efficient alkaline water splitting

Energy & Environmental Science, Год журнала: 2021, Номер 14(10), С. 5228 - 5259

Опубликована: Янв. 1, 2021

This review summarizes the recent progress of atomic heterointerface engineering to overcome activity limitation electrocatalysts for water splitting and elaborates its electron effect ensemble effect, etc.

Язык: Английский

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Ultrathinning Nickel Sulfide with Modulated Electron Density for Efficient Water Splitting

Advanced Energy Materials, Год журнала: 2020, Номер 10(41)

Опубликована: Сен. 27, 2020

Abstract Developing nonprecious electrocatalysts via a cost‐effective methods to synergistically achieve high active sites exposure and optimized intrinsic activity remains grand challenge. Here low‐cost scaled‐up chemical etching method is developed for transforming nickel foam (NF) into highly electrocatalyst both the hydrogen evolution reaction (HER) oxygen (OER). The synthetic involves Na 2 S‐induced of NF in presence Fe, leading growth ultrathin Fe‐doped Ni 3 S arrays on substrate (Fe x 3‐ @ NF). combined experimental theoretical investigations reveal that incorporated Fe cations significantly modulate morphology surface electron density , thus boost electrochemically area, transfer, optimize hydrogen/water absorption free energy. 0.9 2.1 requires overpotentials only 72 mV at 10 mA cm −2 HER 252 100 OER 1.0 m KOH, respectively, enabling an alkaline electrolyzer low cell voltage 1.51 V drive overall water splitting. More broadly, this approach very versatile can be used synthesize other metal sulfides (e.g., Fe–Cu–S, Fe–Al–S, Fe–Ti–S).

Язык: Английский

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Rational Design of Better Hydrogen Evolution Electrocatalysts for Water Splitting: A Review

Advanced Science, Год журнала: 2022, Номер 9(18)

Опубликована: Апрель 18, 2022

Abstract The excessive dependence on fossil fuels contributes to the majority of CO 2 emissions, influencing climate change. One promising alternative is green hydrogen, which can be produced through water electrolysis from renewable electricity. However, variety and complexity hydrogen evolution electrocatalysts currently studied increases difficulty in integration catalytic theory, catalyst design preparation, characterization methods. Herein, this review first highlights principles for reaction (HER) electrocatalysts, presenting thermodynamics, kinetics, related electronic structural descriptors HER. Second, reasonable design, mechanistic understanding, performance enhancement are deeply discussed based intrinsic extrinsic effects. Third, recent advancements electrocatalytic splitting technology further briefly. Finally, challenges perspectives development highly efficient proposed.

Язык: Английский

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Recent advances in vacancy engineering of metal‐organic frameworks and their derivatives for electrocatalysis

SusMat, Год журнала: 2021, Номер 1(1), С. 66 - 87

Опубликована: Март 1, 2021

Abstract The efficient electrocatalysis plays the key role in development of electrochemical energy conversion technologies to alleviate crisis. Given their multiple active sites and large specific surface areas as electrocatalysts, metal‐organic frameworks (MOFs) derivatives have attracted considerable interests recent years. Specially, exploring roles enhanced MOFs is significant for understanding developing new effective electrocatalysts. Recently, vital vacancies has been proven promote electrocatalytic processes (such H 2 or O evolution reactions, reduction N reactions). In order in‐depth effect classification, synthetic strategy, various are reviewed. Also, perspectives on challenges opportunities presented.

Язык: Английский

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Recent progress on transition metal oxides as advanced materials for energy conversion and storage

Energy storage materials, Год журнала: 2021, Номер 42, С. 317 - 369

Опубликована: Июль 22, 2021

Язык: Английский

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Co/CoP Heterojunction on Hierarchically Ordered Porous Carbon as a Highly Efficient Electrocatalyst for Hydrogen and Oxygen Evolution

Advanced Energy Materials, Год журнала: 2021, Номер 11(42)

Опубликована: Окт. 8, 2021

Abstract Designing non‐precious electrocatalysts to synergistically achieve a facilitated mass/electron transfer and exposure of abundant active sites is highly desired but remains significant challenge. Herein, composite electrocatalyst consisting dispersed Co/CoP heterojunction embedded within hierarchically ordered macroporous‐mesoporous‐microporous carbon matrix (Co/CoP@HOMC) rationally designed through the pyrolysis polystyrene sphere‐templated zeolite imidazolate framework‐67 (ZIF‐67) assemblies. The combined experimental theoretical calculations reveal that interfaces not only provide richly exposed also optimize hydrogen/water absorption free energy via electronic coupling, while interconnected macroporous structure enables superior mass all accessible sites. As result, as‐developed Co/CoP@HOMC composites exhibit outstanding catalytic activity with overpotentials 120 260 mV at 10 mA cm −2 for hydrogen evolution reaction oxygen in 1.0 m KOH, respectively. Moreover, an alkaline electrolyzer constructed by requires ultralow cell voltage 1.54 V , outperforming Pt@C||IrO 2 @C couple (1.64 V).

Язык: Английский

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