Double-atom dealloying-derived Frank partial dislocations in cobalt nanocatalysts boost metal-air batteries and fuel cells
|Corresponding Author||Mao，Baoguang; Cao，Minhua|
|Joint first author||Meng，Tao; Sun，Pingping; Yang，Feng|
Oxygen reduction reaction (ORR), an essential reaction in metal-air batteries and fuel cells, still faces many challenges, such as exploiting cost-effective nonprecious metal electrocatalysts and identifying their surface catalytic sites. Here we introduce bulk defects, Frank partial dislocations (FPDs), into metallic cobalt to construct a highly active and stable catalyst and demonstrate an atomic-level insight into its surface terminal catalysis. Through thermally dealloying bimetallic carbide (Co3ZnC), FPDs were in situ generated in the final dealloyed metallic cobalt. Both theoretical calculations and atomic characterizations uncovered that FPD-driven surface terminations create a distinctive type of surface catalytic site that combines concave geometry and compressive strain, and this two-in-one site intensively weakens oxygen binding. When being evaluated for the ORR, the catalyst exhibits onset and half-wave potentials of 1.02 and 0.90 V (versus the reversible hydrogen electrode), respectively, and negligible activity decay after 30,000 cycles. Furthermore, zinc-air batteries and H2-O2/air fuel cells built with this catalyst also achieve remarkable performance, making it a promising alternative to state-of-the-art Pt-based catalysts. Our findings pave the way for the use of bulk defects to upgrade the catalytic properties of nonprecious electrocatalysts.
China Postdoctoral Science Foundation[No. 2021M690016]
Cited Times [WOS]:1
|Document Type||Journal Article|
|Department||Department of Chemistry|
1.Key Laboratory of Cluster Science,Ministry of Education of China,Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials,School of Chemistry and Chemical Engineering,Beijing Institute of Technology,100081,China
2.College of Sciences,Hebei Agricultural University,Baoding,071001,China
3.Department of Chemistry,School of Science,Hainan University,Haikou,570228,China
4.School of Mechanical and Aerospace Engineering,Nanyang Technological University,639798,Singapore
5.Department of Chemistry,Guangdong Provincial Key Laboratory of Catalytic Chemistry,Southern University of Science and Technology,Shenzhen,518055,China
6.Beijing Synchrotron Radiation Laboratory,Institute of High Energy Physics,Chinese Academy of Sciences,100049,China
Meng，Tao,Sun，Pingping,Yang，Feng,et al. Double-atom dealloying-derived Frank partial dislocations in cobalt nanocatalysts boost metal-air batteries and fuel cells[J]. Proceedings of the National Academy of Sciences of the United States of America,2022,119(45):e2214089119.
Meng，Tao.,Sun，Pingping.,Yang，Feng.,Zhu，Jie.,Mao，Baoguang.,...&Cao，Minhua.(2022).Double-atom dealloying-derived Frank partial dislocations in cobalt nanocatalysts boost metal-air batteries and fuel cells.Proceedings of the National Academy of Sciences of the United States of America,119(45),e2214089119.
Meng，Tao,et al."Double-atom dealloying-derived Frank partial dislocations in cobalt nanocatalysts boost metal-air batteries and fuel cells".Proceedings of the National Academy of Sciences of the United States of America 119.45(2022):e2214089119.
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