Rhodium oxide films behave as a fast two-color electrochromic system: Reversible yellow ↔ dark green or yellow ↔ brown-purple color changes are obtained in KOH solutions by applying voltage ~1 V.
ɹˈoʊdiəm ˈɑːksaɪd fˈɪlmz bᵻhˈeɪv æz ɐ fˈæst tˈuːkˈʌlɚɹ ɪlˌɛktɹoʊkɹˈoʊmɪk sˈɪstəm: ɹᵻvˈɜːsᵻbəl jˈɛloʊ lˈɛft ɹˈaɪt ˈæɹoʊ dˈɑːɹk ɡɹˈiːn ɔːɹ jˈɛloʊ lˈɛft ɹˈaɪt ˈæɹoʊ bɹˈaʊnpˈɜːpəl kˈʌlɚ tʃˈeɪndʒᵻz ɑːɹ əbtˈeɪnd ɪn kˌeɪˌoʊˈeɪtʃ səlˈuːʃənz baɪ ɐplˈaɪɪŋ vˈoʊltɪdʒ tˈɪldə wˈʌn vˈiː.