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      Recent progress on metal–organic frameworks and their derived materials for electrocatalytic water splitting

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          Abstract

          The review article discusses the recent progress of MOFs and MOF-derived materials, and the challenges in electrocatalytic water splitting.

          Abstract

          Water splitting is a great technology for alternative and sustainable energy storage and conversion without pollution. In recent years, metal–organic frameworks (MOFs) have shown the most promise as multifunctional materials, due to their tunable pore channels, high specific surface areas, easy alteration of compositions, variety of morphological structures, and capability as precursors. Based on those merits, numerous MOFs and their derived materials have been exploited for water splitting. Herein, we have gleaned relative references in recent years on MOF-based materials for high electrocatalytic activity in water splitting. We have applied their strategies of design and synthesis, along with the challenges and perspectives on modulating the components of the catalytic active sites and their microenvironment to enhance their water splitting performance in this review article.

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          Most cited references279

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          Sustainable hydrogen production.

          Identifying and building a sustainable energy system are perhaps two of the most critical issues that today's society must address. Replacing our current energy carrier mix with a sustainable fuel is one of the key pieces in that system. Hydrogen as an energy carrier, primarily derived from water, can address issues of sustainability, environmental emissions, and energy security. Issues relating to hydrogen production pathways are addressed here. Future energy systems require money and energy to build. Given that the United States has a finite supply of both, hard decisions must be made about the path forward, and this path must be followed with a sustained and focused effort.
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            Synthesis and Activities of Rutile IrO2 and RuO2 Nanoparticles for Oxygen Evolution in Acid and Alkaline Solutions.

            The activities of the oxygen evolution reaction (OER) on iridium-oxide- and ruthenium-oxide-based catalysts are among the highest known to date. However, the OER activities of thermodynamically stable rutile iridium oxide (r-IrO2) and rutile iridium oxide (r-RuO2), normalized to catalyst mass or true surface area are not well-defined. Here we report a synthesis of r-IrO2 and r-RuO2 nanoparticles (NPs) of ∼6 nm, and examine their OER activities in acid and alkaline solutions. Both r-IrO2 and r-RuO2 NPs were highly active for OER, with r-RuO2 exhibiting up to 10 A/goxide at 1.48 V versus reversible hydrogen electrode. When comparing the two, r-RuO2 NPs were found to have slightly higher intrinsic and mass OER activities than r-IrO2 in both acid and basic solutions. Interestingly, these oxide NPs showed higher stability under OER conditions than commercial Ru/C and Ir/C catalysts. Our study shows that these r-RuO2 and r-IrO2 NPs can serve as a benchmark in the development of active OER catalysts for electrolyzers, metal-air batteries, and photoelectrochemical water splitting applications.
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              Ultrathin metal–organic framework nanosheets for electrocatalytic oxygen evolution

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                Author and article information

                Contributors
                Journal
                JMCAET
                Journal of Materials Chemistry A
                J. Mater. Chem. A
                Royal Society of Chemistry (RSC)
                2050-7488
                2050-7496
                July 28 2020
                2020
                : 8
                : 29
                : 14326-14355
                Affiliations
                [1 ]MOE Laboratory of Bioinorganic and Synthetic Chemistry
                [2 ]School of Chemistry
                [3 ]Sun Yat-sen University
                [4 ]Guangzhou 510275
                [5 ]China
                Article
                10.1039/D0TA04016A
                aa0a79ac-a45e-43d8-925a-b3bbd3b58106
                © 2020

                http://rsc.li/journals-terms-of-use

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