Literaturnachweis - Detailanzeige
| Autor/inn/en | Ibanez, Jorge G.; Puente-Caballero, Rodrigo; Torres-Perez, Jonatan; Bustos, Daniel; Carmona-Orbezo, Aranzazu; Sevilla, Fortunato B., III |
|---|---|
| Titel | An Inexpensive Device for Studying Electrochromism |
| Quelle | In: Journal of Chemical Education, 89 (2012) 9, S.1205-1207 (3 Seiten)Infoseite zur Zeitschrift
PDF als Volltext |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
| ISSN | 0021-9584 |
| DOI | 10.1021/ed200592j |
| Schlagwörter | Science Activities; Inorganic Chemistry; Science Instruction; Energy; Scientific Principles; Science Experiments; Science Laboratories; College Science |
| Abstract | A novel procedure for the preparation of electrochromic WO[subscript 3] films from readily available materials is presented. It is based on the electrochemical preparation of potassium tungstate from tungsten filaments of incandescent light bulbs in a potassium hydroxide solution. Tungstic acid is then produced by proton exchange using a super-absorbing polymer from a baby diaper. Simple air drying of the tungstic acid produces a tungsten(VI) oxide layer. On the surface of a copper foil or coupon or of a conducting glass, an electrochromic bleached (colorless)-to-colored (blue) transition of this oxide layer is easily observed by applying an external potential with a common power source in an electrochemical cell where the Cu (or the conducting glass) electrode is the cathode and a Pb electrode is the anode. This experiment can be performed in 2-3 h and is suitable for an applied inorganic chemistry or electrochemistry lab course. (Contains 2 figures.) (As Provided). |
| Anmerkungen | Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2017/4/10 |
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