Coupling PtZn intermetallic and atomically dispersed cobalt towards efficient and stable oxygen reduction reaction catalysts

文献情報

出版日 2023-11-03

DOI 10.1039/D3TA04591A

インパクトファクター 12.732

著者

Lei Zhao, Tingting Yang, Pei Xiong, Xiaobin Niu, Jinxia Jiang, Qian Xue, Le Yu, Rui Wu

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要旨

PtZn is a promising catalyst candidate for the oxygen reduction reaction (ORR) due to its low intermetallic formation energy and high potential stability under reaction conditions. However, the fully occupied electron configuration of Zn (3d104S2) reduces its affinity for surface oxygen species, thus limiting its ORR activity. Herein, we propose a straightforward strategy to prepare small-size PtZn intermetallic nanoparticles supported on a porous carbon that contains atomically dispersed Co anchored at N–C sites (PtZn–CoNC). The coupled PtZn–CoNC catalyst delivers superior ORR activity and remarkable durability with a half-wave potential variation of just 5 mV after 30 000 cycles. The high ORR performance of PtZn–CoNC is associated with the strong metal–support interaction between the PtZn nanoparticles and atomically dispersed Co sites (Co–Nx), as well as the confinement effect of the porous carbon substrate. Density functional theory calculations reveal that Co–Nx sites can adjust the electronic structure of Pt to further optimize the binding energies of oxygen-containing intermediates, thus enhancing ORR activity.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

Coupling PtZn intermetallic and atomically dispersed cobalt towards efficient and stable oxygen reduction reaction catalysts

文献情報

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Journal of Materials Chemistry A

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