Polyoxometalate‐based Modified Electrodes for Electrocatalysis: From Molecule Sensing to Renewable Energy‐related Applications

Oxygen Evolution Reaction Electrocatalytic Improvement in POM@ZIF Nanocomposites: A Bidirectional Synergistic Effect

“…Nowadays, the vital search for alternative and eco-sustainable energy systems strongly stimulates the development of numerous advanced (nano)­materials with potential application as electrocatalysts (ECs) for fuel cell/electrolyzer electrodes. − In this context, polyoxometalates (POMs) and zeolitic imidazolate frameworks (ZIFs) are potentially complementary materials that, separately, have been gaining prominence in the strategic field of energy-related reactions electrocatalysis during the last years. ,− POMs are discrete transition metal oxide anions whose stable redox states can participate in fast reversible electron transfer reactions, while ZIFs are extended 3D regular cage-based frameworks revealing remarkable catalytic properties due to their ordered microporosity and to the transition metal ions in the framework nodes …”

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

“…More than 70 different elements can serve as heteroatoms, including many electrocatalytic active elements, which are conducive to regulating the electrocatalytic performance of POM-based electrocatalysts. 56 (ii) Adjustable molecular volume. The molecular volume of POMs ranges from a few nanometers to over ten nanometers, which is beneficial for combining POMs with other porous materials, such as MOFs, COFs, etc.…”

Permeability of Dawson–type polyoxometalates through vertically oriented nanoporous silica membranes on electrode: Effect of pore size and probe charge

“…Polyoxometalates (POMs) are molecular oxides made of transition metals at high oxidation state and oxygen, often containing heteroatoms, existing mainly in the form of bulky heteropolyanions with nanosized geometry and exhibiting multi-electron transfer properties without structure variation [1][2][3]. Thanks to their very rich electrochemistry [2,4], these heteropolyanions of general formula [XxMmOy] n− (with X the heteroatom and M the metal atom) have found many applications as electrocatalysts, notably for electrochemical sensing and energy storage and conversion applications [4][5][6][7]. For practical uses, POMs often need to be confined onto electrode surfaces, which can be notably achieved via chemisorption, electrodeposition, encapsulation in polymers or inorganic matrices, and deposition as monolayers (Langmuir-Blodgett process) or multilayers (layer-by-layer assembly) [6,[8][9][10][11][12].…”