https://novaprd-lb.newcastle.edu.au/vital/access/manager/Index en-au 5 https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:38917 2O₂ due to the isolation of the Au nanoparticles (AuNPs) from the PtNPs layer. Then the weak acidity of H₂O₂ can trigger the disassembly and reassembly of the AuNPs, resulting in the Janus distribution of large AuNPs aggregates. Such reconstruction of JMPA leads to the contact between PtNPs and AuNPs aggregates, thus changing the propulsion mechanism to self-electrophoresis. The asymmetric and aggregated AuNPs also enable the generation of a thermal gradient under laser irradiation, which propels the JMPA nanomotors by self-thermophoresis. Such multi-phoretic propulsion offers considerable promise for developing advanced nanomachines with a stimuli-responsive switch of propulsion modes in biomedical applications.]]> Wed 02 Mar 2022 15:43:14 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:53281 Tue 21 Nov 2023 10:18:02 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:37282 cat⁻¹ h⁻¹ and a Faradaic efficiency as high as 8.3% at a low overpotential (0.05 V vs the reversible hydrogen electrode), which is far better than that of the bulk Ru counterpart. Moreover, the Ru SAs/g-C₃N₄ displays a high stability during five recycling tests and a 12 h potentiostatic test. Density functional theory calculations reveal that compared to bulk Ru surfaces, Ru SAs/g-C₃N₄ has more facile reaction thermodynamics, and the enhanced NRR performance of Ru SAs/g-C₃N₄ originates from a tuning of the d-electron energies from that of the bulk to a single-atom, causing an up-shift of the d-band center toward the Fermi level.]]> Tue 05 Sep 2023 11:57:42 AEST ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:37255 cat.⁻¹, Faradaic efficiency: 30.1%) at the low overpotential, and to display a high chemical stability and sustained catalytic performance. In conjunction, further mechanism studies indicate B and Al as main-group metals show a highly selective affinity to N₂ due to the strong interaction between the B 2p/Al 3p band and the N 2p orbitals, while Mo exhibits specific catalytic activity toward the subsequent reduction reaction. Overall, the MAB-phase catalyst under the synergy of the elements within ternary compound can suppress the hydrogen evolution reaction and achieve enhanced NRR performance. The significance of this work is to provide a promising candidate in the future synthesis of ammonia.]]> Mon 14 Nov 2022 20:44:46 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:41229 3 yield: 10.6 μg h^–1 cm^–2 mg_cat.^–1 and Faradaic efficiency: 22.6%) at a low overpotential (177 mV). Investigation indicates that the catalyst shows excellent N₂-selective captures due to the unsaturated metal sites binding with N₂. More specifically, as the Al 3p band can strongly interact with N 2p orbitals, Al as a main group metal presents a high and selective affinity to N₂. The utilization of multifunctional MOF catalysts delivers both high N₂ selectivity and abundant catalytic sites, resulting in remarkable efficiency for NH₃ production.]]> Fri 29 Jul 2022 11:49:26 AEST ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:38932 -2, a small Tafel slope of 87 mV dec^-1 and prominent durability. Percolation theory was for the first time introduced to interpret the catalytic mechanism of the CD/CF catalysts. The special morphology assembled by the 0D carbons constituted the percolating clusters and promoted electron transport throughout the 1D carbons. The strategy and theory can be adapted to general electrocatalytic applications for achieving and interpreting precise tuning on highly efficient electron transfer in electrocatalysts.]]> Fri 15 Sep 2023 15:54:21 AEST ]]>