Unsaturated edge-anchored Ni single atoms on porous microwave exfoliated graphene oxide for electrochemical CO2

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dc.contributor.authorCheng, Yen_AU
dc.contributor.authorZhao, Sen_AU
dc.contributor.authorLi, Hen_AU
dc.contributor.authorHe, Sen_AU
dc.contributor.authorVeder, JPen_AU
dc.contributor.authorJohannessen, Ben_AU
dc.contributor.authorXiao, Jen_AU
dc.contributor.authorLu, Sen_AU
dc.contributor.authorPan, Jen_AU
dc.contributor.authorChisholm, MFen_AU
dc.contributor.authorYang, SZen_AU
dc.contributor.authorLiu, Cen_AU
dc.contributor.authorChen, JGen_AU
dc.contributor.authorJiang, SPen_AU
dc.date.accessioned2025-04-03T05:38:57Zen_AU
dc.date.available2025-04-03T05:38:57Zen_AU
dc.date.issued2019-04en_AU
dc.date.statistics2025-02-05en_AU
dc.description.abstractSupported single atom catalysts (SACs), emerging as a new class of catalytic materials, have been attracting increasing interests. Here we developed a Ni SAC on microwave exfoliated graphene oxide (Ni-N-MEGO) to achieve single atom loading of ∼6.9 wt%, significantly higher than previously reported SACs. The atomically dispersed Ni atoms, stabilized by coordination with nitrogen, were found to be predominantly anchored along the edges of nanopores (< 6 nm) using a combination of X-ray absorption spectroscopy (XAS) and aberration-corrected scanning transmission electron microscopy (AC-STEM). The Ni-N-MEGO exhibits an onset overpotential of 0.18 V, and a current density of 53.6 mA mg−1 at overpotential of 0.59 V for CO2 reduction reaction (CO2RR), representing one of the best non-precious metal SACs reported so far in the literature. Density functional theory (DFT) calculations suggest that the electrochemical CO2-to-CO conversion occurs more readily on the edge-anchored unsaturated nitrogen coordinated Ni single atoms that lead to enhanced activity toward CO2RR. © 2018 Elsevier B.V. All rights reserved.en_AU
dc.identifier.citationCheng, Y., Zhao, S., Li, H., He, S., Veder, J.-P., Johannessen, B., Xiao, J., Lu, S., Pan, J., Chisholm, M. F., Yang, S.-Z., Liu, C., Chen, J. G., & Jiang, S. P. (2019). Unsaturated edge-anchored Ni single atoms on porous microwave exfoliated graphene oxide for electrochemical CO2. Applied Catalysis B: Environmental, 243, 294-303. doi:10.1016/j.apcatb.2018.10.046en_AU
dc.identifier.issn0926-3373en_AU
dc.identifier.journaltitleApplied Catalysis B Environment and Energyen_AU
dc.identifier.pagination294-303en_AU
dc.identifier.urihttps://doi.org/10.1016/j.apcatb.2018.10.046en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16121en_AU
dc.identifier.volume243en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectNickelen_AU
dc.subjectCarbon dioxideen_AU
dc.subjectGrapheneen_AU
dc.subjectOxidesen_AU
dc.subjectElectrochemistryen_AU
dc.subjectAtomsen_AU
dc.subjectNitrogenen_AU
dc.subjectSpectroscopyen_AU
dc.titleUnsaturated edge-anchored Ni single atoms on porous microwave exfoliated graphene oxide for electrochemical CO2en_AU
dc.typeJournal Articleen_AU
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