Academic Journal
Heterointerfacial engineering of N,P-doped carbon nanosheets supported Co/Co2P nanoparticles for boosting oxygen reduction and oxygen evolution reactions towards rechargeable Zn-air battery.
| العنوان: | Heterointerfacial engineering of N,P-doped carbon nanosheets supported Co/Co2P nanoparticles for boosting oxygen reduction and oxygen evolution reactions towards rechargeable Zn-air battery. |
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| المؤلفون: | Xi, Wenhao1 (AUTHOR), Wu, Tongchen1 (AUTHOR), Wang, Pan1 (AUTHOR), Huang, Wenlong1 (AUTHOR), Gao, Bifen2 (AUTHOR), He, Liwen1 (AUTHOR), Chen, Yilin1 (AUTHOR), Lin, Bizhou1,2 (AUTHOR) bzlin@hqu.edu.cn |
| المصدر: | Journal of Colloid & Interface Science. Feb2025:Part A, Vol. 680, p355-363. 9p. |
| مصطلحات موضوعية: | *CARBON-based materials, *OXYGEN evolution reactions, *CARBON dioxide, *PERMUTATION groups, *METAL catalysts, *OXYGEN reduction, *HYDROGEN evolution reactions |
| مستخلص: | [Display omitted] • The catalyst was in-situ constructed via a facile molten salt-assisted pyrolysis route. • The Co/Co 2 P heterojunction plays predominant catalysis for OER. • Co/Co 2 P@NPCNS shows excellent bifunctional activity with a Δ E = 0.66 V. • The battery performs high peak power density of 187 mW cm−2. Transition metal phosphides (TMPs) with high electrocatalytic activity for the oxygen evolution reaction (OER) are reckoned as a substitution of precious group metals catalysts in rechargeable Zn-air battery. In this work, Co/Co 2 P heterojunction nanoparticles supported N,P-doped carbon nanosheets (Co/Co 2 P@NPCNS) were designed and prepared via a facile one-step molten salt-assisted pyrolysis process. Density function theory calculations reveal that the heterogeneous interactions of Co/Co 2 P effectively enhance the bifunctional electrocatalytic activity for oxygen reduction reaction (ORR) and OER. The synergistic interaction between the Co/Co 2 P heterojunction nanoparticles with highly exposed active sites and excellent catalytic activity and the two-dimensional doped carbon nanosheets with high conductivity contributes to Co/Co 2 P@NPCNS exhibiting preeminent bifunctional ORR/OER activity and stability with a high half-wave potential for ORR (0.87 V), a low overpotential for OER (302 mV at 10 mA cm−2) and a low potential gap (0.66 V). The homemade rechargeable Zn-air battery performs high peak power density (187 mW cm−2) and exceptional endurance. This heterogeneous interface tactic of integrating TMPs with heteroatom-doped carbon materials may shed light on the research and development of non-precious metal electrocatalysts. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: | Academic Search Index |
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