Sacrificial ZnO nanorods drive N and O dual-doped carbon towards trifunctional electrocatalysts for Zn-air batteries and self-powered water splitting devices
| Parent link: | Catalysis Science & Technology Vol. 11, iss. 12.— 2022.— [P. 4149-4161] |
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| Andre forfattere: | , , , , , , , , |
| Summary: | Title screen Integrated energy systems (IES) have attracted increasing attention in recent years. Zn-air battery powered water splitting devices require the development of highly active and durable trifunctional electrocatalysts for the oxygen evolution, oxygen reduction, and hydrogen evolution reactions (OER/ORR/HER). However, engineering rational nano-scaled designs and achieving the required synergy are major challenges due to the lack/weak control of synthesis processes. Herein, ZIF-67 regular polyhedra were fabricated for the first time to incorporate single ZnO nanorods. Thereafter, pyrolysis sacrificed the nanorods and stimulated intriguing modifications on the ZnONR@ZIF-67-derived CoOx@N, O-doped hierarchical carbon (CoOx@NOC), not only from the outside-in, but also from the inside out. Consequently, an outstanding enhancement in OER/ORR/HER trifunctional activity was achieved. The CoOx@NOC based Zn-air battery showed a small initial charge-discharge voltage gap of 92 mV at 10 mA cm−2 and a high specific capacity and maximum power density of 757.39 mA h gZn−1 and 141.65 mW cm−2, respectively. A CoOx@NOC-based all-solid-state Zn-air battery (SS ZAB) was fabricated, which showed a high open circuit potential of 1.49 V. Two SS ZABs in series drove an overall water splitting system, which showed an intriguingly low potential of 1.51 V at 10 mA cm−2, surpassing most reported electrocatalysts. Thus, the excellent performance of CoOx@NOC implies its great potential to compete with noble metal electrocatalysts Режим доступа: по договору с организацией-держателем ресурса |
| Sprog: | engelsk |
| Udgivet: |
2022
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| Online adgang: | https://doi.org/10.1039/D1CY00119A |
| Format: | Electronisk Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=667875 |