In situ Reduced WO3-x Nanopowders from Bulk Tungsten: One-step Electrosynthesis and Electrochromic Energy Storage Application Научная публикация
| Журнал |
Tungsten
ISSN: 2661-8028 |
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| Вых. Данные | Год: 2025, Том: 7, Страницы: 860–875 Страниц : 16 DOI: 10.1007/s42864-025-00344-x | ||||||
| Ключевые слова | Tungsten recycling · Electrosynthesis · Alternating current · Reduced WO3 · Electrochromism · Energy storage | ||||||
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Информация о финансировании (1)
| 1 | Российский научный фонд | 23-79-10219 |
Реферат:
Tungsten (W) is considered a critical and strategic material, the recycling of which has proved extremely important due to the substantial amount of W-rich waste and rising demand for W products. This study provides a sound technological approach for efficient utilization of bulk W, achieving a high W destruction rate (rw) of 0.3 g·cm−2·h−1 via electrochemical oxidation/ in situ reduction of W electrodes in oxalic acid under alternating current (AC) with varying symmetries to synthesize WO3-x nanopowders (NPs). Amorphous-crystalline dual-phase reduced WO3-x NPs featuring dense and porous nanoarchitectures were synthesized using asymmetrical and symmetrical AC, respectively. The nanoscale interconnecting flaky WO3-x structure arises from the synergy of high anodic voltage etching and the release of H2 microbubbles, boosting the exfoliation of WO3 flakes. The optimized WO3-x NP exhibits superior electrochemical and electrochromic properties, attributed to the increased surface capacitance alongside an extra contribution from intercalation pseudocapacitance. The number of WO3-x layers deposited by the spin coating technique and the annealing temperature have a significant impact on the electrochemical and electrochromic characteristics of the WO3 film. An increase in the transferred charge density (Q), coloring/bleaching time (tc/tb) values, and areal capacitance was observed, alongside a decrease in optical modulation (∆T) and coloration efficiency (CE) with an increasing number of WO3 layers. WO3 produced at a lower temperature outperforms WO3 treated at 400–500 °C, particularly in fast switching, enhanced efficiency, and reversibility. The ∆T of 68.7%, CE of 47.9 cm2·C−1, areal capacitance of 53.5 mF·cm−2, and reversibility close to 100% were achieved in H2SO4 for the optimized WO3-x film. The research aligns with the ongoing development strategy of the circular economy and validates the promising features of the efficient recycling of W-containing spent resources through an environmentally sustainable electrochemical approach.
Библиографическая ссылка:
Ulyankina A.
, Belichenko T.
, Gorshenkov M.
, Yatsenko A.
, Kaichev V.
, Smirnova N.
In situ Reduced WO3-x Nanopowders from Bulk Tungsten: One-step Electrosynthesis and Electrochromic Energy Storage Application
Tungsten. 2025. V.7. P.860–875. DOI: 10.1007/s42864-025-00344-x WOS Scopus OpenAlex
In situ Reduced WO3-x Nanopowders from Bulk Tungsten: One-step Electrosynthesis and Electrochromic Energy Storage Application
Tungsten. 2025. V.7. P.860–875. DOI: 10.1007/s42864-025-00344-x WOS Scopus OpenAlex
Даты:
| Поступила в редакцию: | 22 февр. 2025 г. |
| Принята к публикации: | 16 мая 2025 г. |
| Опубликована online: | 28 авг. 2025 г. |
| Опубликована в печати: | 1 дек. 2025 г. |
Идентификаторы БД:
| Web of science: | WOS:001560755000001 |
| Scopus: | 2-s2.0-105014411854 |
| OpenAlex: | W4413783103 |