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Enhanced Oxygen Reduction Performance on {101} CoMn2O4 Spinel Facets AITranslate

Ming Zhou; Dasol Yoon; Yao Yang; Lihua Zhang; Can Li; Hongsen Wang; Anju Sharma; Shaojie Jiang; David A. Muller; Héctor D. Abruña; Jiye Fang;
State University of New York at Binghamton; Cornell University; Cornell University; Brookhaven National Laboratory; State University of New York at Binghamton; Cornell University; State University of New York at Binghamton; State University of New York at Binghamton; Cornell University; Cornell University; State University of New York at Binghamton
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Publisher: ACS
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Abstract AITranslate

We present a facile colloidal synthesis method to produce uniform-sized (9 nm) CoMn2O4 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 CoMn2O4 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.

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DOI：https://doi.org/10.1021/acsenergylett.3c01376

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Citation Information:

We present a facile colloidal synthesis method to produce uniform-sized (9 nm) CoMn2O4 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 CoMn2O4 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.

quote

GB/T 7714-2015 [1] Ming Zhou, Dasol Yoon, Yao Yang, et al. ACS Energy Letters, 2023(8). DOI:10.1021/acsenergylett.3c01376.
MLA [1] Ming Zhou, et al., ACS Energy Letters, no. 8, 2023, https://doi.org/10.1021/acsenergylett.3c01376.
APA [1] Ming Zhou, Dasol Yoon, Yao Yang, Lihua Zhang, Can Li, Hongsen Wang, Anju Sharma, Shaojie Jiang, David A. Muller, Héctor D. Abruña, & Jiye Fang. (2023). ACS Energy Letters(8). https://doi.org/10.1021/acsenergylett.3c01376
IEEE [1] Ming Zhou, Dasol Yoon, Yao Yang, Lihua Zhang, Can Li, Hongsen Wang, Anju Sharma, Shaojie Jiang, David A. Muller, Héctor D. Abruña, and Jiye Fang, ACS Energy Letters, no. 8, 2023, doi: 10.1021/acsenergylett.3c01376.