| 1. |
- Chen, Lin, et al.
(författare)
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A super-efficient cobalt catalyst for electrochemical hydrogen production from neutral water with 80 mV overpotential
- 2014
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Ingår i: Energy & Environmental Science. - : Royal Society of Chemistry (RSC). - 1754-5692 .- 1754-5706. ; 7:1, s. 329-334
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Tidskriftsartikel (refereegranskat)abstract
- Self-assembled molecular iron and cobalt catalysts (MP4N2, M = Fe, Co) bearing a multihydroxy-functionalized tetraphosphine ligand electrocatalyze H-2 generation from neutral water on a mercury electrode at -1.03 and -0.50 V vs. NHE, respectively. Complex CoP4N2 displays extremely low overpotential (E-onset = 80 mV) while maintaining high activity and good stability. Bulk electrolysis of CoP4N2 in a neutral phosphate buffer solution at -1.0 V vs. NHE produced 9.24 x 10(4) mol H-2 per mol cat. over 20 h, with a Faradaic efficiency close to 100% and without apparent deactivation.
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| 2. |
- Du, Zaifa, et al.
(författare)
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Efficiency enhancement of micro-light-emitting diode with shrinking size by localized surface plasmons coupling
- 2024
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Ingår i: Applied Physics B: Lasers and Optics. - 0946-2171. ; 130:3
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Tidskriftsartikel (refereegranskat)abstract
- The external quantum efficiency (EQE) enhancement of different sized GaN micro-light-emitting diodes (μLEDs) by using localized surface plasmons (LSPs) have been studied. Silver nanoparticles (Ag NPs) are attached to the sidewalls of μLEDs by spin-coating so as to be effectively coupled with the multiple quantum well (MQW) of μLEDs and generate the LSPs. In the μLEDs with 20 × 20 μm2 large mesas, the LSPs can effectively inhibit the efficiency droop. Compared to the μLED samples without the LSPs coupling, the EQE has been enhanced by about 8% at a high current density of 20,000 A/cm2. This work confirms the effectiveness of the LSPs technology in improving the μLED performances, which is originally practiced only on the basal faces of conventional LEDs.
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| 3. |
- Han, Kai, et al.
(författare)
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Photochemical hydrogen production from water catalyzed by CdTe quantum dots/molecular cobalt catalyst hybrid systems
- 2015
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Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 51:32, s. 7008-7011
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Tidskriftsartikel (refereegranskat)abstract
- A hybrid system with a coordinative interaction between a cobalt complex of a N2S2-tetradentate ligand and CdTe quantum dots displayed a high activity (initial TOF 850 h(-1)) and improved stability (TON 1.44 x 10(4) based on catalyst over 30 h) for the photochemical H-2 generation from water, with a quantum efficiency of 5.32% at 400 nm.
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| 4. |
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| 5. |
- Wang, Mei, et al.
(författare)
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Integration of organometallic complexes with semiconductors and other nanomaterials for photocatalytic H-2 production
- 2015
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Ingår i: Coordination chemistry reviews. - : Elsevier BV. - 0010-8545 .- 1873-3840. ; 287, s. 1-14
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Forskningsöversikt (refereegranskat)abstract
- The development of energy-efficient, cost-effective and durable photocatalytic systems for water splitting is one of the scientific problems that must be solved before the successful transformation from a fossil fuel-based economy to a solar fuel-based economy can be realized. Conventional photocatalytic systems are generally divided into heterogeneous systems of semiconductors, usually modified by noble metals or inorganic cocatalysts, and homogeneous systems comprised of molecular catalysts and organic or organometallic chromophores. In recent years, some hybrid photocatalytic systems were reported to be highly active and robust for photoinduced H-2 production, indicating that the integration of semiconducting materials with proper molecular catalysts is an effective strategy for constructing efficient photocatalytic systems for water splitting. This review will focus on hybrid photocatalytic systems, developed in the past three years, in which proton reduction molecular catalysts incorporate either semiconducting materials or inorganic, metal-organic, and other polymeric nanomaterials for photochemical H-2 generation from water. In the last section of the review, problems existing in the current hybrid photocatalytic systems are discussed; future challenges and developments are envisaged.
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| 6. |
- Zhang, Peili, et al.
(författare)
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Highly efficient molecular nickel catalysts for electrochemical hydrogen production from neutral water
- 2014
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Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 50:91, s. 14153-14156
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Tidskriftsartikel (refereegranskat)abstract
- A series of nickel complexes containing N-5-pentadentate ligands with different amine-to-pyridine ratios were studied for electrochemical H-2 production in neutral water and the one with a diamine-tripyridine ligand displays a TON of up to 308000 over 60 h electrolysis at -1.25 V vs. SHE, with a Faradaic efficiency of similar to 91%.
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