Enhanced Oxygen Reduction Performance on {101} CoMn2O4 Spinel Facets
Source abstract
Abstract
We present a facile colloidal synthesis method to produce uniform-sized (9 nm) CoMn 2 O 4 spinel nano-octahedra tailored with {101} facets. These nano-octahedra demonstrate enhanced electrocatalytic activity for the oxygen reduction reaction (ORR) in alkaline media compared to their spherical counterparts and previously reported spinel electrocatalysts. At 0.85 V, they achieve a high mass activity (MA) of 60.0 A/g, surpassing their spherical counterparts (38.6 A/g). Moreover, the CoMn 2 O 4 nano-octahedra exhibit favorable stability, maintaining an MA of 47.2 A/g after 10 000 durability cycles. This work highlights a promising approach for synthesizing advanced spinel nanooxides with controlled crystal facets, which hold the potential to serve as nonprecious metal ORR electrocatalysts. The enhanced ORR performance is attributed to the exposed active catalyst surfaces in the well-defined structures of the nano-octahedra, emphasizing the significance of catalyst shape control.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Electrochemical Analysis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
Analytical and Diagnostics Lab, State University of New York at Binghamton, Binghamton, New York 13902, United States
Funding
Basic Energy Sciences · Division of Materials Research
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