Optical Switching of Y‐Hydride Thin Film Electrodes A Remarkable Electrochromic Phenomenon

摘要: The optical appearance of yttrium thin film electrodes can be electrochemically switched from mirrorlike to highly transparent by making use the hydride-forming properties Y. A strong alkaline solution is a suitable electrolytic environment for obtaining stable electrochromic electrodes. presence Pd layer covering Y electrode essential in providing sufficiently high electrocatalytic activity electrochemical charge-transfer reaction. Hydrogen irreversibly bound Y-dihydride and reversibly Y-trihydride. changes are reversible induced within narrow hydrogen concentration range, this typical material interesting application new type devices.