In:
Electrochemical Science Advances, Wiley, Vol. 2, No. 3 ( 2022-06)
Abstract:
The manganese dioxide/graphene oxide (MnO 2 /GO) nanocomposites were prepared from hydrothermally synthesized MnO 2 nanorods and graphene oxide. Electrocatalytic performance for the oxygen reduction reactions (ORR) of the fabricated MnO 2 /GO nanocomposites was evaluated using the rotating disk electrode (RDE) method. It is found that MnO 2 /GO nanocomposites deliver significantly enhanced performance compared to standalone MnO 2 and GO with current density and onset potential values of 5.1 mA/cm 2 and 0.93 V versus RHE, respectively. The alkaline membrane fuel cell (AMFC) characteristics were also studied. In particular, the single‐cell alkaline fuel cell stack with MnO 2 /GO nanocomposite as cathode loading produced a peak power density value of 82 mW/cm 2 . Our findings revealed great potential for MnO 2 /GO nanocomposites for their electrocatalytic performance and utilization in AMFC as the cathode. Namely, MnO 2 /GO achieved fuel cell functionalities that were comparable to the widely used commercial Pt/C. The enhanced electrochemical performance of MnO 2 /GO is attributed to the synergistic interaction between highly conductive GO sheets and active sites of MnO 2 nanorods. The commendable performance of MnO 2 /GO suggests that it can be used as electrocatalysts in alkaline fuel cell applications.
Type of Medium:
Online Resource
ISSN:
2698-5977
,
2698-5977
DOI:
10.1002/elsa.202100085
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
2984616-X
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