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oai:riuma.uma.es:10630/229022026-02-03T12:07:37Zcom_10630_2254col_10630_37959

00925njm 22002777a 4500 dc Bazaga-García, Montse author Pérez-Colodrero, Rosario Mercedes author Vílchez-Cózar, Álvaro author Armakola, Eirini author Gjika, M. author Visa, Aurelia author Choquesillo-Lazarte, Duane author Olivera-Pastor, Pascual author Cabeza-Díaz, Aurelio author Demadis, Konstantinos D. author 2021 Metal phosphonates-based coordination polymers (CPs) are known to exhibit versatile structural diversity and functionality. Thus, they have been used, among other applications, as electrocatalyst precursors for both, PEMFCs and electrolysers. In this work, we report the synthesis, crystal structure and electrochemical properties of imidazole-containing Co2+, Ni2+ and Zn2+ derivatives of the etidronic acid, (HO)2P(O)-C(CH3)(OH)-P(O)(OH)2 (ETID). Analyses of the crystal structures reveals that these solids are 1D, in which the imidazole molecules form part of the coordination sphere of the cations (Co2+, Ni2+) or act as charge-compensating imidazolium cations (Zn2+). Co2+ and Ni2+ solids were pyrolysed under 5% H2/Ar atmosphere at different temperatures. The resulting metal phosphides were tested as electrocatalysts for the Oxygen Evolution and Reduction Reactions (OER and ORR, respectively) and the Hydrogen Evolution Reaction (HER). Preliminary results indicate that Co2+ derivatives exhibit better performance. https://www.europhosphonates.iic.cas.cz/workshop/ti/ https://hdl.handle.net/10630/22902 Química organometálica Imidazole-containing Co2+ and Ni2+ etidronates: crystal structures and electrochemical behaviour