RT Conference Proceedings
T1 Applications of N,N-bis(phosphonomethyl)glycine-derived Sn4+ or Co2+ phosphonates as proton conductors or energy-conversion electrocatalysts.
A1 Cañamero-Cebrián, Fernando
A1 Pérez-Colodrero, Rosario Mercedes
A1 Vílchez-Cózar, Álvaro
A1 Bazaga-García, Montse
A1 Ramírez-Losilla, Enrique
A1 Olivera-Pastor, Pascual
A1 Cabeza-Díaz, Aurelio
K1 Química inorgánica
K1 Fósforo - Compuestos
K1 Catalizadores metálicos
AB Metal phosphonates (MPs), a subclass of coordination polymers, may exhibit acidic groups such as POH,SO3H, COOH, N+-H, etc. Combining these features with electrocatalytically active transition metals,make them highly appealing in the field of fuel cells and electrolysers, as potential proton conductors and/orprecursors of electrocatalysts [1,2].Herein, we investigate the synthesis, characterization and applications of a series of Co2+ and Sn4+phosphonates derived from glycine-N,N-bis(methylenenphosphonic acid) (BPMGLY). In the case of the tinderivative, an amorphous compound, Sn(C4H11O8NP2)0.75Cl2.5(H2O)2.5 (Sn4+- BPMGLY), was obtainedby hydrothermal synthesis. Its pyrolytic treatment at 700 ºC in air led to an amorphous pyrophosphate, (Sn4+-BPMGLY@700). Regarding cobalt phosphonates, three crystalline phases with composition[Co(C4H9O8NP2(H2O)2]·nH2O (n=0, 2) were obtained and their crystal structure were solved. All familieswere extensively studied as proton conductors across a wide range of temperature and humidityconditions, displaying the Sn4+ derivatives the highest conductivity values of 7.99·10-4 and 6.63·10-3 S·cm-1 forSn4+-BPMGLY and Sn4+-BPMGLY@700, respectively, at 95 °C and 95% relative humidity (RH) (Figure 1a).Furthermore, the cobalt phosphonates were utilized as precursors for non-precious metal catalysts(NPMCs), by pyrolysis in 5%-H2/Ar at different temperatures and studied as electrocatalysts towardsthe oxygen evolution reaction (OER), hydrogen evolution reaction (HER) and oxygen reduction reaction(ORR)
YR 2023
FD 2023
LK https://hdl.handle.net/10630/27845
UL https://hdl.handle.net/10630/27845
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026