title: Carbon supported Ag nanoparticles as high performance cathode catalyst for H2/O2 anion exchange membrane fuel cell.
abstract: A solution phase-based nanocapsule method was successfully developed to synthesize non-platinum metal catalyst-carbon supported Ag nanoparticles (Ag/C). XRD patterns and TEM image show Ag nanoparticles with a small average size (5.4 nm) and narrow size distribution (2-9 nm) are uniformly dispersed on the carbon black Vulcan XC-72 support. The intrinsic activity and pathway of oxygen reduction reaction (ORR) on the Ag/C and commercial Pt/C were investigated using rotating ring disk electrode (RRDE) tests at room temperature. The results confirmed that the 4-electron pathway of ORR proceeds on small Ag nanoparticles, and showed comparable ORR activities on the self-prepared Ag/C and a commercial Pt/C. A single H2-O2 anion exchange membrane fuel cell (AEMFC) with the Ag/C cathode catalyst exhibited an open circuit potential of 0.98 V and a peak power density of 190 mW/cm(2) at 80°C.
authors.affiliation: Department of Chemical Engineering, Michigan Technological University Houghton, MI, USA.
authors.forename: Le
authors.initials: L
authors.lastname: Xin
authors.affiliation: Department of Chemical Engineering, Michigan Technological University Houghton, MI, USA.
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Chemical Engineering, Michigan Technological University Houghton, MI, USA.
authors.forename: Zhichao
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Chemical Engineering, Michigan Technological University Houghton, MI, USA.
authors.forename: Ji
authors.initials: J
authors.lastname: Qi
authors.affiliation: Department of Chemical Engineering, Michigan Technological University Houghton, MI, USA.
authors.forename: Wenzhen
authors.initials: W
authors.lastname: Li
keywords: anion exchange membrane; electrocatalyst; fuel cell; nanoparticles; non-platinum catalyst; oxygen reduction