TY - JOUR
T1 - Carbon supported PdM (M = Fe, Co) electrocatalysts for formic acid oxidation. Influence of the Fe and Co precursors
AU - Juárez-Marmolejo, L.
AU - Pérez-Rodríguez, S.
AU - Montes de Oca-Yemha, M. G.
AU - Palomar-Pardavé, M.
AU - Romero-Romo, M.
AU - Ezeta-Mejía, A.
AU - Morales-Gil, P.
AU - Martínez-Huerta, M. V.
AU - Lázaro, M. J.
N1 - Publisher Copyright:
© 2018 Hydrogen Energy Publications LLC
PY - 2019/1/15
Y1 - 2019/1/15
N2 - Pd and PdM (M = Fe or Co) nanostructured electrocatalysts were synthesized by the impregnation method and supported on carbon black Vulcan XC-72R for the formic acid oxidation reaction, FAOR, in acid medium. Nitrates or chlorides were used as Fe and Co precursors to study the counter ion role on the physicochemical features and electrochemical performance of the electrocatalysts. TEM analysis showed that PdM was deposited on the carbon material with a particle size around 2–3 nm. From XRD, peaks associated with the fcc palladium planes were observed along with evidence of PdM alloy formation, particularly when the nitrate salts were used as metal precursors. Furthermore, XPS analyses indicated that nitrates promote the metal oxide formation to a greater extent than chlorides, mainly for Pd. PdCo electrocatalyst obtained from nitrates exhibited the highest performance for FAOR with a steady state current density of 451 and 313 μA cm −2 at 200 and 400 mV respectively, which is in both cases, 3 times larger than that developed for a commercial Pd/C catalyst.
AB - Pd and PdM (M = Fe or Co) nanostructured electrocatalysts were synthesized by the impregnation method and supported on carbon black Vulcan XC-72R for the formic acid oxidation reaction, FAOR, in acid medium. Nitrates or chlorides were used as Fe and Co precursors to study the counter ion role on the physicochemical features and electrochemical performance of the electrocatalysts. TEM analysis showed that PdM was deposited on the carbon material with a particle size around 2–3 nm. From XRD, peaks associated with the fcc palladium planes were observed along with evidence of PdM alloy formation, particularly when the nitrate salts were used as metal precursors. Furthermore, XPS analyses indicated that nitrates promote the metal oxide formation to a greater extent than chlorides, mainly for Pd. PdCo electrocatalyst obtained from nitrates exhibited the highest performance for FAOR with a steady state current density of 451 and 313 μA cm −2 at 200 and 400 mV respectively, which is in both cases, 3 times larger than that developed for a commercial Pd/C catalyst.
KW - CO oxidation
KW - Formic acid oxidation
KW - Palladium
KW - Palladium-cobalt
KW - Palladium-iron
UR - http://www.scopus.com/inward/record.url?scp=85058057515&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2018.11.112
DO - 10.1016/j.ijhydene.2018.11.112
M3 - Artículo
SN - 0360-3199
VL - 44
SP - 1640
EP - 1649
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 3
ER -