https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43464 Wed 21 Sep 2022 16:05:20 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52597 Wed 18 Oct 2023 08:50:15 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55658 Wed 12 Jun 2024 12:20:42 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43950 Wed 05 Oct 2022 13:05:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55527 Wed 05 Jun 2024 09:24:02 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39564 Tue 26 Jul 2022 15:25:02 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40922 2) are expected to offer superior basicity and unique electronic properties. However, the synthesis of these nanostructures is highly challenging since many parts of the C-N frameworks in the carbon nitride should be replaced with thermodynamically less stable N-N frameworks as the nitrogen content increases. Thermodynamically stable C₃N₇ and C₃N₆ with an ordered mesoporous structure are synthesized at 250 and 300 °C respectively via a pyrolysis process of 5-amino-1H-tetrazole (5-ATTZ). Polymerization of the precursor to the ordered mesoporous C₃N₇ and C₃N₆ is clearly proved by X-ray and electron diffraction analyses. A combined analysis including diverse spectroscopy and FDMNES and density functional theory (DFT) calculations demonstrates that the N-N bonds are stabilized in the form of tetrazine and/or triazole moieties in the C₃N₇ and C₃N₆. The ordered mesoporous C₃N₇ represents the better oxygen reduction reaction (ORR) performances (onset potential: 0.81 V vs reversible hydrogen electrode (RHE), electron transfer number: 3.9 at 0.5 V vs RHE) than graphitic carbon nitride (g-C₃N₄) and the ordered mesoporous C₃N₆. The study on the mechanism of ORR suggests that nitrogen atoms in the tetrazine moiety of the ordered mesoporous C₃N₇ act as active sites for its improved ORR activity.]]> Tue 16 Aug 2022 10:28:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49320 Tue 14 Nov 2023 14:26:53 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50377 Tue 08 Aug 2023 14:08:09 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54121 Tue 06 Feb 2024 11:30:03 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40103 2 is used to study its magnetic properties. In detail, single crystal WSe₂ is codoped with 4 at% Co and various concentrations of Nb by employing the physical ion implantation method. Raman, X-ray diffraction and X-ray photoelectron spectroscopy results reveal the effective substitutional doping of implanted elements (Co and Nb). Magnetic measurements illustrate that both un-doped and 4 at% Co doped WSe₂ show weak ferromagnetism whereas magnetization is strongly enhanced when Co and Nb are codoped into WSe₂. The magnetization is comparable with a ferromagnet, which may be attributed to Co, Nb doping and defects. In addition, a large coercivity of ≈1.2 kOe is observed in the 1 at% Nb–4 at% Co codoped WSe₂ sample, which may be ascribed to the combined effect of doping-induced stress, defect-dictated pinning and anisotropy of Nb-Se bond owing to the charge transfer between Nb and Se ions.]]> Tue 05 Jul 2022 11:09:36 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55858 Tue 02 Jul 2024 15:11:22 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:994 Sat 24 Mar 2018 08:29:51 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48177 Mon 29 Jan 2024 18:34:01 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46128 Fri 11 Nov 2022 15:22:03 AEDT ]]>