https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:37201 0.5Zn_0.5S@halloysite nanotubes tertiary structure is designed via facile in situ assembly, which settles all the above‐mentioned issues and achieves exceptional and stable photocatalytic H₂ evolution and storage. Significantly, EDTA grafted on halloysites as the hole (h⁺) traps steers the photogenerated h⁺ and electrons (e−) from Cd_0.5Zn_0.5S separately to halloysites and outer surface Pt sites, achieving efficient directional separation between h+ and e− and inhibiting the h⁺‐dominated photocorrosion occurring on Cd_0.5Zn_0.5S. Benefiting from these advantages, the hierarchy shows an unprecedented photocatalytic H₂ evolution rate of 25.67 mmol g⁻¹ h⁻¹ with a recording apparent quantum efficiency of 32.29% at λ = 420 nm, which is seven‐fold that of Cd_0.5Zn_0.5S. Meanwhile, an H₂ adsorption capacity of 0.042% is achieved with the room temperature of 25°C and pressure of 2.65 MPa. This work provides a new perspective into designing hierarchical structure for H₂ evolution, and proposes an integration concept for H₂ evolution and storage.]]> Wed 24 Jan 2024 15:11:12 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35548 -1 h^-1), and durability for H₂O₂ electrogeneration by the two-electron pathway of ORR.]]> Wed 04 Dec 2019 11:57:34 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46425 2 hierarchical nanotubes with high pre-intercalated K cation content (a-K_0.19MnO₂) are proposed as a superior cathode for ZIBs. Specifically, the a-K_0.19MnO₂ nanotubes are prepared via a self-sacrificial template method, including a neutral solvent hydrothermal intercalation and a subsequent annealing phase transformation process. When tested as cathodes for ZIBs, a subsequent H⁺ and Zn²⁺intercalation mechanism at different voltage platforms is clarified. The water-solvated H⁺ first inserts into tunnel cavities and the subsequent insertion of Zn²⁺ into MnO₂ partially changes the MnO₂ phase from a tunnel-type structure to a layered-type structure (Zn-buserite). The high content pre-intercalated K cations in the layered-type matrix as pillars stabilize the layered structures and expand Zn²⁺ migration channels, which can facilitate the diffusion of Zn2⁺ in the MnO₂ cathodes. It is noteworthy that, a K-salt additive is employed to maintain the concentration of K⁺ in the electrolyte with the aim of inhibiting the extraction of K⁺ from the a-K_0.19MnO₂ host material during cycling, thereby further boosting the cycling ability.]]> Thu 12 Oct 2023 15:30:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:36355 Thu 02 Apr 2020 10:39:32 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52716 Mon 29 Jan 2024 18:23:04 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46663 3−x) electrode with an ultrahigh mass loading of 15.4 mg cm⁻² on a functionalized partially exfoliated graphite substrate using a facile electrochemical method. In addition to the highly open graphene nanosheets atop, the unique layered structures of intercalated graphite sheets ensure efficient ionic transport in the entire MoO_3−x electrode. The oxygen-containing functional groups on the exfoliated graphene can bind strongly with the MoO_3−x via formation of C–O–Mo bonding, which provides a fast electron transport path from graphene to MoO_3−x and thus allows high reversible capacity and excellent rate performance. The optimized MoO_3−x electrode delivers an outstanding areal capacitance of 4.03 F cm⁻² at 3 mA cm⁻² with an excellent rate capability which is significantly higher than the values of other molybdenum oxide based electrodes reported to date. More importantly, the areal capacitance increases proportionally with the MoO_3−x mass loading, indicating that the capacitive performance is not limited by ion diffusion even at such a high mass loading. An asymmetric supercapacitor (ASC) assembled with an MoO_3−x anode delivers a maximum volumetric energy density of 2.20 mW h cm⁻³ at a volumetric power density of 3.60 mW cm⁻³, which is superior to those of the majority of the state-of-the-art supercapacitors.]]> Mon 28 Nov 2022 18:32:21 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46882 2O₂ is an important chemical widely used in paper, textile, water treatment and other fields, while the current industrial anthraquinone pathway is not sustainable. Herein, a highly efficient electrocatalyst, reduced graphene oxide (rGO_-KOH), applied for electrochemical H₂O₂ production was obtained by treating graphene oxide (GO) with KOH aqueous solution. Compared to KBH₄-treated reduced graphene oxide (rGO_-KBH4) made by KBH₄ reduction method, rGO_-KOH has more ether bonds (C–O–C) on the surface and a larger electrochemically active surface area. Benefiting from these advantages, rGO_-KOH exhibits enhanced selectivity (∼100%) and mass activity for the oxygen reduction reaction through a two-electron pathway (ORR-2e) than rGO-KBH₄. Meanwhile, rGO_-KOH also shows the excellent durablity for (ORR-2e) in alkaline media. Thus, rGO_-KOH may be an ideal electrocatalyst for H₂O₂ electroproduction.]]> Mon 05 Dec 2022 15:01:56 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52063 2 hierarchical nanotubes with high pre-intercalated K cation content (a-K_0.19MnO₂) are proposed as a superior cathode for ZIBs. Specifically, the a-K_0.19MnO₂ nanotubes are prepared via a self-sacrificial template method, including a neutral solvent hydrothermal intercalation and a subsequent annealing phase transformation process. When tested as cathodes for ZIBs, a subsequent H⁺ and Zn²⁺intercalation mechanism at different voltage platforms is clarified. The water-solvated H⁺ first inserts into tunnel cavities and the subsequent insertion of Zn²⁺ into MnO₂ partially changes the MnO₂ phase from a tunnel-type structure to a layered-type structure (Zn-buserite). The high content pre-intercalated K cations in the layered-type matrix as pillars stabilize the layered structures and expand Zn²⁺ migration channels, which can facilitate the diffusion of Zn2⁺ in the MnO₂ cathodes. It is noteworthy that, a K-salt additive is employed to maintain the concentration of K⁺ in the electrolyte with the aim of inhibiting the extraction of K⁺ from the a-K_0.19MnO₂ host material during cycling, thereby further boosting the cycling ability.]]> Fri 13 Oct 2023 08:36:57 AEDT ]]>