TY - JOUR
T1 - Nitrogen-modified carbon-based catalysts for oxygen reduction reaction in polymer electrolyte membrane fuel cells
AU - Subramanian, Nalini P.
AU - Li, Xuguang
AU - Nallathambi, Vijayadurda
AU - Kumaraguru, Swaminatha P.
AU - Colon-Mercado, Hector
AU - Wu, Gang
AU - Lee, Jong Won
AU - Popov, Branko N.
PY - 2009/3/1
Y1 - 2009/3/1
N2 - Nitrogen-modified carbon-based catalysts for oxygen reduction were synthesized by modifying carbon black with nitrogen-containing organic precursors. The electrocatalytic properties of catalysts were studied as a function of surface pre-treatments, nitrogen and oxygen concentrations, and heat-treatment temperatures. On the optimum catalyst, the onset potential for oxygen reduction is approximately 0.76 V (NHE) and the amount of hydrogen peroxide produced at 0.5 V (NHE) is approximately 3% under our experimental conditions. The characterization studies indicated that pyridinic and graphitic (quaternary) nitrogens may act as active sites of catalysts for oxygen reduction reaction. In particular, pyridinic nitrogen, which possesses one lone pair of electrons in addition to the one electron donated to the conjugated π bond, facilitates the reductive oxygen adsorption.
AB - Nitrogen-modified carbon-based catalysts for oxygen reduction were synthesized by modifying carbon black with nitrogen-containing organic precursors. The electrocatalytic properties of catalysts were studied as a function of surface pre-treatments, nitrogen and oxygen concentrations, and heat-treatment temperatures. On the optimum catalyst, the onset potential for oxygen reduction is approximately 0.76 V (NHE) and the amount of hydrogen peroxide produced at 0.5 V (NHE) is approximately 3% under our experimental conditions. The characterization studies indicated that pyridinic and graphitic (quaternary) nitrogens may act as active sites of catalysts for oxygen reduction reaction. In particular, pyridinic nitrogen, which possesses one lone pair of electrons in addition to the one electron donated to the conjugated π bond, facilitates the reductive oxygen adsorption.
KW - Carbon-based catalyst
KW - Nitrogen modification
KW - Oxygen reduction
KW - PEM fuel cell
UR - https://www.scopus.com/pages/publications/59649121270
U2 - 10.1016/j.jpowsour.2008.11.087
DO - 10.1016/j.jpowsour.2008.11.087
M3 - Article
AN - SCOPUS:59649121270
SN - 0378-7753
VL - 188
SP - 38
EP - 44
JO - Journal of Power Sources
JF - Journal of Power Sources
IS - 1
ER -