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      Recent Development of Zeolitic Imidazolate Frameworks (ZIFs) Derived Porous Carbon Based Materials as Electrocatalysts

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          Materials for fuel-cell technologies.

          Fuel cells convert chemical energy directly into electrical energy with high efficiency and low emission of pollutants. However, before fuel-cell technology can gain a significant share of the electrical power market, important issues have to be addressed. These issues include optimal choice of fuel, and the development of alternative materials in the fuel-cell stack. Present fuel-cell prototypes often use materials selected more than 25 years ago. Commercialization aspects, including cost and durability, have revealed inadequacies in some of these materials. Here we summarize recent progress in the search and development of innovative alternative materials.
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            A perovskite oxide optimized for oxygen evolution catalysis from molecular orbital principles.

            The efficiency of many energy storage technologies, such as rechargeable metal-air batteries and hydrogen production from water splitting, is limited by the slow kinetics of the oxygen evolution reaction (OER). We found that Ba(0.5)Sr(0.5)Co(0.8)Fe(0.2)O(3-δ) (BSCF) catalyzes the OER with intrinsic activity that is at least an order of magnitude higher than that of the state-of-the-art iridium oxide catalyst in alkaline media. The high activity of BSCF was predicted from a design principle established by systematic examination of more than 10 transition metal oxides, which showed that the intrinsic OER activity exhibits a volcano-shaped dependence on the occupancy of the 3d electron with an e(g) symmetry of surface transition metal cations in an oxide. The peak OER activity was predicted to be at an e(g) occupancy close to unity, with high covalency of transition metal-oxygen bonds.
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              Design and synthesis of an exceptionally stable and highly porous metal-organic framework

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                Author and article information

                Journal
                Advanced Energy Materials
                Adv. Energy Mater.
                Wiley
                16146832
                September 2018
                September 2018
                July 10 2018
                : 8
                : 25
                : 1801257
                Affiliations
                [1 ]Institute for Superconducting and Electronic Materials (ISEM); Australian Institute for Innovation Materials (AIIM); University of Wollongong; Wollongong NSW 2525 Australia
                [2 ]Department of Physics; and BUAA-UOW Joint Research Centre; Beihang University; Haidian District Beijing 100091 China
                Article
                10.1002/aenm.201801257
                38740403-ee57-4433-b9eb-e34e080ae31d
                © 2018

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