Bifunctional electro-catalysts based on the Keggin/Dawson-type polyoxotungstates and Cu-tris(imidazolyl) complexes. (20th October 2015)

• Record Type: Journal Article
• Authors: Zhou, Wanli; Peng, Jun; Zhang, Zheyu; Ding, Yanhong; Khan, Shifa Ullah
• Is Part Of: Electrochimica acta. Volume 180(2015)
• Page Start: 887
• Page End: 893
• Publication Date: 2015-10-20
• Subjects: Bifunctional electrocatalyst -- Electrochemistry -- Carbon paste electrode; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.09.040
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Three new inorganic-organic hybrid compounds based on the Keggin/Dawson POMs, [Cu2 (Htib)2 (α-SiW12 O40 )] (1 ), [Cu2 (Htib)2 (H2 tib)2 (H2 O)4 (α-HBW12 O40 )2 ]·8H2 O (2 ), and [Cu2 (H2 tib)4 (H2 O)2 (α-HP2 W18 O62 )2 ]·14H2 O (3 ) (tib = 1, 3, 5-tris(1-imidazoly) benzene), have been obtained through hydrothermal methods. X-ray structural analyses show that compounds1 –3 are constructed from Cu-tib modified Keggin/Dawson POMs. Compounds1 –3 have been employed to fabricate bulk-modified carbon paste electrode (CPE) (noted as n -CPEs, n = 1 –3 ) to study their electrochemical properties. Cyclic voltammetries of n -CPEs ( n = 1–3 ) display bifunctional electrocatalytic activities toward reduction of nitrite and oxidation of ascorbic acid.