Stabile Polyoxometallat‐Nickelschaum‐Elektroden für elektrochemische Sauerstoffentwicklung im alkalischen Milieu

Abstract

Die Entwicklung von technisch relevanten Elektroden fürdie elektrochemischeSauerstoffentwicklung (OER) ist eine der grçßten Herausforderungen der chemischen Energiewandlung.Nun gelang die hydrothermale Immobilisierung des Dexter-Silverton-Polyoxometallats,[ Co 6.8 Ni 1.2 W 12 O 42 -(OH) 4 (H 2 O) 8 ], auf einer kommerziellen Nickelschaumelektrode.

Four octamolybdate compounds with properties of organic dye adsorption and photocatalytic reduction of Cr(vi)

“…3–6 For example, because of their unique properties such as high surface charge distribution and reversible multiple electron transfer ability, POMs have been widely used in electrochemistry, 7,8 separation, capacitors, 9,10 sensors 11,12 and catalysis. 13,14 Octomolybdates have become an important member of the POMs and are widely studied owing to their structural diversity and interesting properties. Since Schwing-Weill and Arnaud-Neu first gave exact evidence of the isomers of octamolybdate by infrared technology in 1970, octamolybdates have never left the chemist's sight.…”

Recent advances in polyoxometalate-based materials and their derivatives for electrocatalysis and energy storage

“…3a, the interaction between the MWCNT carrier and POMs increased the specific surface area and accelerated the electron transfer rate to the electrode, which is beneficial for the improvement of OER performance. Song's group 87 . As illustrated in Fig.…”

“…3a, the interaction between the MWCNT carrier and POMs increased the specific surface area and accelerated the electron transfer rate to the electrode, which is beneficial for the improvement of OER performance. Song's group 87 deposited POM ([Co 6.8 Ni 1.2 W 12 O 42 (OH) 4 (H 2 O) 8 ]) molecular catalyst microcrystalline on the nickel foam electrode to prepare a NiCo-POM/Ni electrode (Fig. 3b), which has high OER performance and near 100% FE.…”

Polyoxometalates-Functionalized Electrodes for (Photo)Electrocatalytic Applications: Recent Advances and Prospects

“…255 Such an electrode also showed remarkable OER activity (360 mV overpotential at 10 mA cm −2 ) under the same pH conditions, with no chemical or mechanical degradation observed after prolonged operation time (>10 h) as evidenced by postelectrolysis SEM and XRD data. 256 The decoration of such Dexter−Silverton POM-based composites with transition metal based phosphides, such as Co 2 P, yielded bifunctional electrodes active for both HER and OER in alkaline medium, with overpotentials of 130 mV and 336 mV at 50 mA cm −2 for HER and OER, respectively. 257 Besides metal phosphides, Earth-abundant transition metal sulfides have also emerged as low-cost and bifunctional electrocatalysts for HER and OER.…”