Nitrogen-doped Carbon-CoO_x Nanohybrids: A Precious Metal Free Cathode that Exceeds 1.0 W cm^-2 Peak Power and 100 h Life in Anion-Exchange Membrane Fuel Cells.

ABSTRACT: Efficient and durable nonprecious metal electrocatalysts for the oxygen reduction (ORR) are highly desirable for several electrochemical devices, including anion exchange membrane fuel cells (AEMFCs). Here, a 2D planar electrocatalyst with CoO_x embedded in nitrogen-doped graphitic carbon (N-C-CoO_x ) was created through the direct pyrolysis of a metal-organic complex with a NaCl template. The N-C-CoO_x catalyst showed high ORR activity, indicated by excellent half-wave (0.84 V vs. RHE) and onset (1.01 V vs. RHE) potentials. This high intrinsic activity was also observed in operating AEMFCs where the kinetic current was 100 mA cm^-2 at 0.85 V. When paired with a radiation-grafted ETFE powder ionomer, the N-C-CoO_x AEMFC cathode was able to

SUBMITTER: Peng X 

PROVIDER: S-EPMC6468319 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature