An Unprecedented CeO₂/C Non-Noble Metal Electrocatalyst for Direct Ascorbic Acid Fuel Cells.

ABSTRACT: Direct ascorbic acid fuel cells (DAAFCs) employ biocompatible ascorbic acid (AA) as fuel, allowing convenient storage, transportation, and fueling as well as avoiding fuel crossover. The AA oxidation reaction (AAOR) largely governs the performance of DAAFCs. However, AAOR electrocatalysts currently have low activity, and state-of-the-art ones are limited to carbon black. Herein, we report the synthesis of an unprecedented AAOR electrocatalyst comprising 3.9 ± 1.1 nm CeO₂ nanoparticles evenly distributed on carbon black simply by the wet chemical precipitation of Ce(OH)₃ and a subsequent heat treatment. The resultant CeO₂/C shows a remarkable AAOR activity with a peak current density of 13.1 mA cm^-2, which is 1.7 times of that of carbon black (7.6

SUBMITTER: Qiu C 

PROVIDER: S-EPMC10574731 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature