dc.contributor.author | Khan, K | |
dc.contributor.author | Yan, X | |
dc.contributor.author | Yu, Q | |
dc.contributor.author | Bae, SH | |
dc.contributor.author | White, JJ | |
dc.contributor.author | Liu, J | |
dc.contributor.author | Liu, T | |
dc.contributor.author | Sun, C | |
dc.contributor.author | Kim, J | |
dc.contributor.author | Cheng, HM | |
dc.contributor.author | Wang, Y | |
dc.contributor.author | Liu, B | |
dc.contributor.author | Amine, K | |
dc.contributor.author | Pan, X | |
dc.contributor.author | Luo, Z | |
dc.date.accessioned | 2021-10-11T06:26:24Z | |
dc.date.available | 2021-10-11T06:26:24Z | |
dc.date.issued | 2021 | |
dc.identifier.issn | 2211-2855 | |
dc.identifier.doi | 10.1016/j.nanoen.2021.106488 | |
dc.identifier.uri | http://hdl.handle.net/10072/408818 | |
dc.description.abstract | This work aims to obtain a fundamental understanding of active sites near stone-wales (SW) defects rich nitrogen-doped graphene (DG) with specific coordination of carbon atom rings. It reveals that the SW rich defects (e.g., pentagon (5), pentagon—octagon—pentagon (i.e. 585), or pentagon-heptagon-heptagon-pentagon (5775) rings, appears correspondingly with carbon rings that brought active sites during catalytic reactions. Moreover, we anchored dual isolated metallic atoms (Ni/Fe) on DG support via linkers (O/N) called NiFe-DG. X-ray absorption spectroscopy indicates Ni/Fe metal single atoms are embedded via Fe-N4 and Ni-N4 coordination on DG surfaces. It exhibits high catalytic activity for oxygen reduction reaction (ORR) with an onset potential of 0.97 V, a half-wave potential of 0.86 V, and diffusion current density of 5.7 mA cm− 2, which is at par with commercial Pt/C. The catalyst shows superior stability, retained 82% of the initial current density even after 12 h under an applied potential of 0.86 V. Similarly, the oxygen evolution reaction (OER) overpotential of 358 mV was achieved at 10 mA cm− 2 with a lower Tafel slope value (76 mV/dec) than commercial Pt/C. It maintains 85% stability for 12 h at a constant potential of 1.588 V, shows better stability than commercial Pt/C. | |
dc.description.peerreviewed | Yes | |
dc.language | en | |
dc.publisher | Elsevier BV | |
dc.relation.ispartofpagefrom | 106488 | |
dc.relation.ispartofjournal | Nano Energy | |
dc.relation.ispartofvolume | 90 | |
dc.subject.fieldofresearch | Nanotechnology | |
dc.subject.fieldofresearch | Macromolecular and materials chemistry | |
dc.subject.fieldofresearch | Materials engineering | |
dc.subject.fieldofresearch | Environmental engineering | |
dc.subject.fieldofresearchcode | 4018 | |
dc.subject.fieldofresearchcode | 3403 | |
dc.subject.fieldofresearchcode | 4016 | |
dc.subject.fieldofresearchcode | 4011 | |
dc.title | Stone-Wales defect-rich carbon-supported dual-metal single atom sites for Zn-air batteries | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dcterms.bibliographicCitation | Khan, K; Yan, X; Yu, Q; Bae, SH; White, JJ; Liu, J; Liu, T; Sun, C; Kim, J; Cheng, HM; Wang, Y; Liu, B; Amine, K; Pan, X; Luo, Z, Stone-Wales defect-rich carbon-supported dual-metal single atom sites for Zn-air batteries, Nano Energy, 2021, 90, pp. 106488 | |
dc.date.updated | 2021-10-06T00:13:29Z | |
gro.hasfulltext | No Full Text | |
gro.griffith.author | Wang, Yun | |