Polyoxometalate Chemistry for Smart Materials

A special issue of Inorganics (ISSN 2304-6740). This special issue belongs to the section "Coordination Chemistry".

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 1642

Special Issue Editors


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Guest Editor
Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentiev St. 3, Novosibirsk 630090, Russia
Interests: noble metals chalcogenide clusters; polyoxometalates; inorganic materials; crystallography
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Guest Editor
Institute of Natural Sciences and Mathematics, Ural Federal University, 620002 Yekaterinburg, Russia
Interests: polyoxometalates; nanocluster; supramolecular structure; photophysics; click-reactions; self-assembling; hybrid materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The chemistry of polyoxometalates has a rich and challenging history, starting from the chemistry of Keggin and Dawson-type structures to the chemistry of nanoscale-sized molecules. Polyoxometalates (POM) form a unique field of research at the edge of inorganic, coordination and supramolecular chemistry. The main feature of this class of compounds is structural versatility producing infinite possibilities for the synthesis and modification. This aspect provides huge opportunities to tune the structure in order to obtain challenging applications in catalysis, material science, biology or spintronics. Recent progress in polyoxometalate science focuses on the following directions:

(i) The preparation of fully inorganic or hybrid organic/inorganic polyoxometalate-based coordination polymers which are stable enough to access numerous catalytic applications;

(ii) Engineering of polyoxometalate-based smart materials for various applications covering solar cells, flow batteries, supercapacitors, etc.;

(iii) The state of the art in self-assembly reactions for nanoscaled inorganic or hybrid organic/inorganic molecules preparation;

(iv) Biochemical and biomedicine applications against SARS-CoV-2 and so on.

In this Special Issue, we wish to cover the most recent advances in polyoxometalate science by hosting a mix of original research articles and comprehensive review papers.

Dr. Pavel A. Abramov
Dr. Kirill Grzhegorzhevskii
Guest Editors

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Keywords

  • polyoxometalate-based materials
  • polyoxometalates in biochemistry and medicine
  • self-assembly strategies for POM synthesis
  • polyoxometalate-based catalysis

Published Papers (1 paper)

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Research

17 pages, 3703 KiB  
Article
Hybrids Composed of an Fe-Containing Wells–Dawson Polyoxometalate and Carbon Nanomaterials as Promising Electrocatalysts for the Oxygen Reduction Reaction
by Hugo C. Novais, Bruno Jarrais, Israël-Martyr Mbomekallé, Anne-Lucie Teillout, Pedro de Oliveira, Cristina Freire and Diana M. Fernandes
Inorganics 2023, 11(10), 388; https://doi.org/10.3390/inorganics11100388 - 29 Sep 2023
Cited by 1 | Viewed by 1275
Abstract
The oxygen reduction reaction (ORR) is a key cathodic reaction in energy-converting systems, such as fuel cells (FCs). Thus, it is of utmost importance to develop cost-effective and efficient electrocatalysts (ECs) without noble metals to substitute the Pt-based ones. This study focuses on [...] Read more.
The oxygen reduction reaction (ORR) is a key cathodic reaction in energy-converting systems, such as fuel cells (FCs). Thus, it is of utmost importance to develop cost-effective and efficient electrocatalysts (ECs) without noble metals to substitute the Pt-based ones. This study focuses on polyoxometalate (POM)-based ECs for ORR applications. A Wells–Dawson POM salt K7 [P2W17(FeOH2)O61].·20H2O was immobilised onto graphene flakes and multiwalled carbon nanotubes doped with nitrogen, denominated as P2W17Fe@GF_N8 and P2W17Fe@MWCNT_N8. The successful preparation of the composites was proved with various characterisation techniques, including FTIR, XPS and SEM. Both materials showed good ORR performance in an alkaline medium with similar potential onset values of ~0.84 V vs. RHE and diffusion-limiting current densities of −3.9 and −3.3 mA cm−2 for P2W17Fe@MWCNT_N8 and P2W17Fe@GF_N8, respectively. Furthermore, both composites presented low Tafel slopes (48–58 mV dec−1). Chronoamperometric tests revealed that the as-prepared nanocomposites rendered a significant improvement achieving between 90 and 94% of current retention in tolerance to methanol in comparison with Pt/C, and moderate to good long-term electrochemical stability with current retentions comprised between 68 and 88%. This work reinforces the use of POMs as important electroactive species for the preparation of alternative ORR electrocatalysts, exhibiting good activity, stability and selectivity towards the ORR in the presence of methanol. Full article
(This article belongs to the Special Issue Polyoxometalate Chemistry for Smart Materials)
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