TY - JOUR
T1 - Enhanced electrocatalytic hydrogen evolution reaction
T2 - Supramolecular assemblies of metalloporphyrins on glassy carbon electrodes
AU - Canales, Camila
AU - Varas-Concha, Felipe
AU - Mallouk, Thomas E.
AU - Ramírez, Galo
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/7/5
Y1 - 2016/7/5
N2 - Chemically modified electrodes formed by π-stacking of metalloporphyrins provide a stable and efficient electrocatalytic system for the hydrogen evolution reaction at pH 7.0. Metalloporphyrins M-OEP (M = Co(II), Cu(II), Zn(II), Ru(II), Fe(III) and Ni(II), OEP = 2,3,7,8,12,13,17,18-Octaethyl-21H,23H-porphine) were deposited on glassy carbon electrodes that had been previously modified by using NaOH and 4-aminopyridine, which served as a bridging molecule between the metalloporphyrins and the electrode surface. Different supramolecular architectures, as revealed by AFM and SEM, were obtained with bare and oxidized glassy carbon electrode surfaces. The most active systems were those obtained with Co(II) and Cu(II) porphyrins. Raman spectra showed the presence of the linking molecules and metalloporphyrins in the electrocatalytic metalloporphyrin films.
AB - Chemically modified electrodes formed by π-stacking of metalloporphyrins provide a stable and efficient electrocatalytic system for the hydrogen evolution reaction at pH 7.0. Metalloporphyrins M-OEP (M = Co(II), Cu(II), Zn(II), Ru(II), Fe(III) and Ni(II), OEP = 2,3,7,8,12,13,17,18-Octaethyl-21H,23H-porphine) were deposited on glassy carbon electrodes that had been previously modified by using NaOH and 4-aminopyridine, which served as a bridging molecule between the metalloporphyrins and the electrode surface. Different supramolecular architectures, as revealed by AFM and SEM, were obtained with bare and oxidized glassy carbon electrode surfaces. The most active systems were those obtained with Co(II) and Cu(II) porphyrins. Raman spectra showed the presence of the linking molecules and metalloporphyrins in the electrocatalytic metalloporphyrin films.
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U2 - 10.1016/j.apcatb.2016.01.066
DO - 10.1016/j.apcatb.2016.01.066
M3 - Article
AN - SCOPUS:84957617769
SN - 0926-3373
VL - 188
SP - 169
EP - 176
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -