https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.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://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47622 Tue 24 Jan 2023 13:55:39 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55004 Thu 28 Mar 2024 13:31:01 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41019 Thu 21 Jul 2022 12:08:17 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46657 3), electrocatalytic nitrogen reduction reactions (NRRs) under ambient conditions using renewable energy sources (e.g. solar) have attracted significant attention; however, the design of an efficient electrocatalyst for the NRR is a challenging task and has been of central research interest. Herein, we report the synthesis of ruthenium(iii) polyethyleneimine (Ru(iii)-PEI) catalysts supported on carboxyl-modified carbon nanotubes (Ru(iii)-PEI@MWCNTs) by a self-assembly process driven by electrostatic forces at room temperature. Our newly designed Ru(iii)-PEI@MWCNTs were employed as bifunctional catalysts for the NRR and 5-hydroxymethylfurfural (HMF) oxidation. At -0.10 V vs. the reversible hydrogen electrode (RHE), our Ru(iii)-PEI@MWCNTs exhibited the high NH₃ yield rate of 188.90 μg_NH3 mg_cat.^-1 h^-1 and the faradaic efficiency (FE) of 30.93% at room temperature. Furthermore, owing to its favorable thermodynamics for HMF oxidation, the Ru(iii)-PEI@MWCNT electrode demonstrated an impressive electrocatalytic HMF oxidation at 1.24 V, 220 mV lower than that for oxygen evolution. The two-electrode electrolyzer employing Ru(iii)-PEI@MWCNTs as a bifunctional catalyst for both the cathode and the anode showed the current density of 0.50 mA cm^-2 with the cell voltage of only 1.34 V over 27 hours of stable electrolysis with a 94% FE for 2,5-furandicarboxylic acid (FDCA) production; this suggested an outstanding performance of this electrolyzer for the coupling of NRR with HMF oxidation. This study represents the first attempt at the ground demonstration of combining NH₃ production with biomass upgrading.]]> Thu 07 Dec 2023 11:10:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46344 −1 mgCAT⁻¹ and faradaic efficiency (FE) of 11.6% are achieved using our antimonene nanosheets. Theoretical calculations suggest that the oxidized species of antimonene act as the active catalytic sites for the NRR process. This work opens up a new avenue towards the development of 2D electrocatalysts for clean energy.]]> Mon 29 Jan 2024 17:48:27 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47479 Mon 23 Jan 2023 11:40:32 AEDT ]]> https://ogma.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://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40594 Fri 15 Jul 2022 11:14:14 AEST ]]>