The thermal decomposition and analyses of metal tris-acetylacetonates

Lalancette, Roger A.; Syzdek, Dougles; Grȩbowicz, Janusz; Arslan, Evrim; Bernal, Ivan

doi:10.1007/s10973-018-7598-8

Cited by 19 publications

(15 citation statements)

References 7 publications

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“…Formation of carbon layers was caused by annealing of polymer, which probably derived from the recombination of organic ligands produced by the decomposition of metal acetylacetonates. [ 13b,14 ] The I D / I G ratio was determined to be 0.82, indicating the presence of abundant defect sites in the carbon layers. The defect‐rich carbon shell could effectively suppress aggregation of the ultrafine nanoparticles without compromising mass transportation, thus enabling superior durability of the catalyst as well as potential excellent catalytic activity induced by the so‐called “confinement effects.” [ 15 ] High‐angle annular dark‐field (HAADF) scanning TEM (STEM) was employed to determine the atomic structure of the RuCr@C catalyst.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Cascade Hydrogen Evolution Boosting via Integrating Surface Oxophilicity Modification with Carbon Layer Confinement

Bao

Yang

Yuan

et al. 2021

Adv Funct Materials

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The lack of highly efficient catalysts severely hinders large‐scale application of electrochemical hydrogen evolution reaction (HER) for hydrogen production from water. Herein, synergistic cascade hydrogen evolution boosting by combining the strategies of carbon layer confinement and surface oxophilicity modification is realized. The carbon layers confined ultrafine RuCr nanoparticles (RuCr@C) exhibit outstanding HER activity (j10 = 19 mV, turnover frequency = 4.25 H2 s‐1), surpassing the benchmark Pt/C and most of the reported HER catalysts. Combined experimental verifications and theoretical simulations reveal that surface adsorption modification and electronic structure regulation synergistically boosts the HER kinetics over the RuCr@C catalyst. The Volmer step is accelerated by stabilizing the final state of water dissociation (*H and *OH) through Cr doping, and the Heyrovsky step is promoted via carbon layers confinement. As such, this work highlights a synergistic cascade strategy to boost HER kinetics which is of fundamental importance to accelerate future advances in electrocatalysis.

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Section: Resultsmentioning

confidence: 99%

Synergistic Cascade Hydrogen Evolution Boosting via Integrating Surface Oxophilicity Modification with Carbon Layer Confinement

Bao

Yang

Yuan

et al. 2021

Adv Funct Materials

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“…The g factor value between 1.999 and 2.01 has been reported as the carbonyl radicals caused by the decomposition of metal–organic precursors in metal-hydroxide/oxide materials where the form of (–M–O–C˙) bond exists in the lattice or surface led to luminescence between 440 and 470 nm. 6,13,16,20,21,31–33 By increasing the number of washing Sample-B nanoparticles, we confirmed that carbonyl radicals were almost on the surface of nanoparticles. After washing 20 times with methanol, it was confirmed in Fig.…”

Section: Resultsmentioning

confidence: 73%

“…one electron trapped at an oxygen vacancy) and carbonyl radical causing UV and blue light are located within the wide band gap of aluminum hydroxide. 4,12,14,16–18,29–33 Additional PLE spectra of Sample-A and B monitored at 390 nm wavelength are in Fig. S1(a) and (b) †.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis of UV/blue light-emitting aluminum hydroxide with oxygen vacancy and their application to electrically driven light-emitting diodes

et al. 2022

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“…Thermal analysis also allows to determine thermal stability of organic and inorganic materials [22,23]. Thermogravimetry was also applied to investigate thermal behaviour of different metal salts, including copper nitrates and acetates [24][25][26]. However, most of works are focused on the decomposition processes in air (up to 400-500 °C).…”

Section: Introductionmentioning

confidence: 99%

Metal salts as dopants for ZnO ceramics-thermogravimetry coupled with mass spectrometry studies

Wieciński

Więcław-Midor

2021

J Therm Anal Calorim

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The paper presents results concerning thermal decomposition of copper II salts (acetylacetonate, acetate monohydrate and nitrate trihydrate) in synthetic air and argon flow. Thermogravimetry tests coupled with mass spectrometry were performed in temperature range of 25–1300 °C. The influence of salt addition on the rheological properties and sintering behaviour of ceramic samples was then investigated. The microstructure evolution based on light and scanning electron microscopies coupled with stereological methods was described. The performed investigations revealed not only the differences in thermal decomposition of examined salts but also differences in the phenomena related to the oxidation and reduction processes of copper products. The atmosphere has also influenced the mechanisms of salts decomposition as well as further changes in decomposition products. Moreover, the presence of ZnO powder has changed the thermal decomposition process of copper II acetylacetonate. The investigations showed that acetates and nitrates can be efficient in homogeneous distribution of small amounts of metal additives in the ZnO-based suspensions. Higher concentrations of these type of salts lead to the increase of viscosity due to the fact that acetates and nitrates increase the ionic strength in the slurry. On the other hand, acetylacetonates do not disturb the stability of the slurries. However, they are characterized by low water solubility and thus homogenous distribution of small amount of these dopants is more difficult. The addition of copper increased the grain size of the sintered ZnO samples. The copper was not segregated at grain boundaries in the form of oxide, it diffused into ZnO matrix.

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The thermal decomposition and analyses of metal tris-acetylacetonates

Cited by 19 publications

References 7 publications

Synergistic Cascade Hydrogen Evolution Boosting via Integrating Surface Oxophilicity Modification with Carbon Layer Confinement

Synergistic Cascade Hydrogen Evolution Boosting via Integrating Surface Oxophilicity Modification with Carbon Layer Confinement

Synthesis of UV/blue light-emitting aluminum hydroxide with oxygen vacancy and their application to electrically driven light-emitting diodes

Metal salts as dopants for ZnO ceramics-thermogravimetry coupled with mass spectrometry studies

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