02213nas a2200289 4500008004100000022001400041245009500055210006900150260000800219300000800227490000600235520133700241653001001578653001101588653001201599653002001611653001201631653001101643100001601654700002401670700001701694700002401711700001801735700002101753700002501774856012401799 2019 eng d a2073-434400aHigh-performing PGM-free AEMFC cathodes from carbon-supported cobalt ferrite nanoparticles0 aHighperforming PGMfree AEMFC cathodes from carbonsupported cobal cMAR a2640 v93 a
Efficient and durable non-precious metal electrocatalysts for the oxygen reduction reaction (ORR) are highly desirable for several electrochemical devices, including anion exchange membrane fuel cells (AEMFCs). Here, cobalt ferrite (CF) nanoparticles supported on Vulcan XC-72 carbon (CF-VC) were created through a facile, scalable solvothermal method. The nano-sized CF particles were spherical with a narrow particle size distribution. The CF-VC catalyst showed good ORR activity, possessing a half-wave potential of 0.71 V. Although the intrinsic activity of the CF-VC catalyst was not as high as some other platinum group metal (PGM)-free catalysts in the literature, where this catalyst really shined was in operating AEMFCs. When used as the cathode in a single cell 5 cm(-2) AEMFC, the CF-VC containing electrode was able to achieve a peak power density of 1350 mW cm(-2) (iR-corrected: 1660 mW cm(-2)) and a mass transport limited current density of more than 4 A cm(-2) operating on H-2/O-2. Operating on H-2/Air (CO2-free), the same cathode was able to achieve a peak power density of 670 mW cm(-2) (iR-corrected: 730 mW cm(-2)) and a mass transport limited current density of more than 2 A cm(-2). These peak power and achievable current densities are among the highest reported values in the literature to date.
10aAEMFC10acobalt10aFerrite10ahigh-performing10anon-PGM10avulcan1 aPeng, Xiong1 aKashyap, Varchaswal1 aNg, Benjamin1 aKurungot, Sreekumar1 aWang, Lianqin1 aVarcoe, John, R.1 aMustain, William, E. uhttp://library.ncl.res.in/content/high-performing-pgm-free-aemfc-cathodes-carbon-supported-cobalt-ferrite-nanoparticles