Fe/N/C is a promising non-platinum catalyst for the oxygen reduction reaction （ORR）. Even so, mass transfer remains a challenge in the application of Fe/N/C to proton exchange membrane fuel cells, due to the high ca...Fe/N/C is a promising non-platinum catalyst for the oxygen reduction reaction （ORR）. Even so, mass transfer remains a challenge in the application of Fe/N/C to proton exchange membrane fuel cells, due to the high catalyst loadings required. In the present work, mesoporous Fe/N/C was syn- thesized through heat treatment of K]600 carbon black coated with poly-2-aminobenzimidazole and FeC13. The as-prepared Fe/N/C possesses a unique hollow-shell structure that contains a buffer zone allowing both water formation and vaporization, and also facilitates the mass transfer of gas- eous oxygen. This catalyst generated an oxygen reduction reaction activiW of 9.21 A/g in conjunc- tion with a peak power density of 0.71 W/cm2.展开更多
Novel methanol-tolerant oxygen-reduction catalysts, iridium-sulphur （Ir-S） chalcogenides with different Ir/S atomic ratios, were synthesized via a precipitation method using H2IrCI6 and Na2SO3 as the Ir and S precur...Novel methanol-tolerant oxygen-reduction catalysts, iridium-sulphur （Ir-S） chalcogenides with different Ir/S atomic ratios, were synthesized via a precipitation method using H2IrCI6 and Na2SO3 as the Ir and S precursors. Powder X-ray diffraction （XRD） and transmission electron microscopy （TEM） were used to characterize the lrxSl_x/C chalcogenide catalysts. Particle size ranging from 2.5 to 2.8 nm though obvi- ous agglomeration was found on carbon support. However, these chalcogenide catalysts showed strong catalytic activity towards the oxygen reduction reaction （ORR） and high methanol tolerance, strongly suggesting these novel catalysts as promising candidates for direct methanol fuel cell （DMFC） cathode applications.展开更多
基金supported by the National Basic Research Program of Chain(973 Program,2015CB932300)the National Natural Science Foundation of China(21373175,21321062,21361140374)Fundamental Research Funds for the Central Universities(20720150109)
文摘Fe/N/C is a promising non-platinum catalyst for the oxygen reduction reaction （ORR）. Even so, mass transfer remains a challenge in the application of Fe/N/C to proton exchange membrane fuel cells, due to the high catalyst loadings required. In the present work, mesoporous Fe/N/C was syn- thesized through heat treatment of K]600 carbon black coated with poly-2-aminobenzimidazole and FeC13. The as-prepared Fe/N/C possesses a unique hollow-shell structure that contains a buffer zone allowing both water formation and vaporization, and also facilitates the mass transfer of gas- eous oxygen. This catalyst generated an oxygen reduction reaction activiW of 9.21 A/g in conjunc- tion with a peak power density of 0.71 W/cm2.
基金the National High Technology R&D Program of China (2007AA05Z146,2007AA05Z150)Natural Science Foundation of China
文摘Novel methanol-tolerant oxygen-reduction catalysts, iridium-sulphur （Ir-S） chalcogenides with different Ir/S atomic ratios, were synthesized via a precipitation method using H2IrCI6 and Na2SO3 as the Ir and S precursors. Powder X-ray diffraction （XRD） and transmission electron microscopy （TEM） were used to characterize the lrxSl_x/C chalcogenide catalysts. Particle size ranging from 2.5 to 2.8 nm though obvi- ous agglomeration was found on carbon support. However, these chalcogenide catalysts showed strong catalytic activity towards the oxygen reduction reaction （ORR） and high methanol tolerance, strongly suggesting these novel catalysts as promising candidates for direct methanol fuel cell （DMFC） cathode applications.
