Polyaromatic-terminated iron(ii) clathrochelates as electrocatalysts for efficient hydrogen production in water electrolysis cells with polymer electrolyte membrane

Remarkable stability of a molecular ruthenium complex in PEM water electrolysis

“…3.7 times lower than the one reported by Dedov and co-workers (1300 mA cm −2 ) at about the same catalyst load ( ca. 0.21 μmol cm −2 2 dil @C vs. 0.16 μmol cm −2 reported by Dedov 39 ). But Dedov's cathode shows a drop of the current density by 50–70 mA cm −2 during 24 hours of electrolysis at 2.2 V. In contrast, 2 dil @C is stable over 7 days of electrolysis at 80 °C using a similar working potential ( c.a.…”

“…13 Dedov and co-workers reported functionalized iron, ruthenium, and cobalt clathrochelate cage complexes physisorbed on carbon paper. 38,39 The complexes were used as electro(pre)catalysts for hydrogen production in a PEM membrane electrode assembly (MEA) for water electrolysis with an IrO 2 anode. At cell voltages of 2.2 V, impressive current densities of well over 1200 mA cm À2 were reached at catalyst loadings of ca.…”

“…0.16 μmol cm −2 . 39 While the activity is remarkable, the complex shows signs of decomposition after 24 hours at 2.2 V, which manifests in a drop of current density by 50–70 mA cm −2 .…”

Removal of anionic and cationic dyes using porous copolymer networks made from a Sonogashira cross‐coupling reaction of diethynyl iron (II) clathrochelate with various arylamines

“…[22][23][24][25][26][27] Among these complexes, iron(II) clathrochelates were found to be prominent derivatives for applications, as biosensors, catalysts for hydrogen generation, materials for electronic transport, organogels, as well as building blocks to make supramolecular cages and metalorganic frameworks (MOFs). 21,22,[27][28][29][30][31] Moreover, the high chemical stability of iron(II) clathrochelate units end-capped with arylboronate groups, allows their use in various cross-coupling reactions to make functional polymers. 24,25,32 In this study, we report the synthesis of four novel copolymers using the palladium-catalyzed Sonogashira cross-coupling reaction of an iron(II) clathrochelate unit end-capped with acetylene groups with various brominated arylamine synthons.…”

“…Metal clathrochelates were first reported 50 years ago as three‐dimensional octahedral organometallic complexes with an encapsulated central metal‐ion, 19–21 which subsequently prompted the synthesis of a myriad of clathrochelate derivatives because they offer several advantages, chiefly, a versatile synthesis from environmental‐friendly synthons, high chemical stability, and cost‐effectiveness 22–27 . Among these complexes, iron(II) clathrochelates were found to be prominent derivatives for applications, as biosensors, catalysts for hydrogen generation, materials for electronic transport, organogels, as well as building blocks to make supramolecular cages and metalorganic frameworks (MOFs) 21,22,27–31 . Moreover, the high chemical stability of iron(II) clathrochelate units end‐capped with arylboronate groups, allows their use in various cross‐coupling reactions to make functional polymers 24,25,32 .…”