Synthesis of cobalt, palladium, and rhenium nanoparticles

Bahadori, Sh. Ranjbar; Hart, Ryan; Hao, Yaowu

doi:10.1007/s42864-020-00057-3

Cited by 16 publications

(5 citation statements)

References 182 publications

(188 reference statements)

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“…Despite such a variety of elements, only a few of them have been investigated for the preparation of 2D colloidal nanoparticles in their metallic form. Apart from the scarcity of the elements of the f-block, other reasons to explain this may include the difficulty of isolating the pure form of some of the metals (e.g., Hf or Zr), as well as the high oxophilicity of many members of the hcp family (e.g., Ti, Re, Gd). − …”

Section: Other Crystal Lattices and Compositionsmentioning

confidence: 99%

Plate-Like Colloidal Metal Nanoparticles

et al. 2023

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The pseudo-two-dimensional (2D) morphology of plate-like metal nanoparticles makes them one of the most anisotropic, mechanistically understood, and tunable structures available. Although well-known for their superior plasmonic properties, recent progress in the 2D growth of various other materials has led to an increasingly diverse family of plate-like metal nanoparticles, giving rise to numerous appealing properties and applications. In this review, we summarize recent progress on the solution-phase growth of colloidal plate-like metal nanoparticles, including plasmonic and other metals, with an emphasis on mechanistic insights for different synthetic strategies, the crystallographic habits of different metals, and the use of nanoplates as scaffolds for the synthesis of other derivative structures. We additionally highlight representative self-assembly techniques and provide a brief overview on the attractive properties and unique versatility benefiting from the 2D morphology. Finally, we share our opinions on the existing challenges and future perspectives for plate-like metal nanomaterials.

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Section: Other Crystal Lattices and Compositionsmentioning

confidence: 99%

Plate-Like Colloidal Metal Nanoparticles

et al. 2023

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“…Afterward, the etching process removed the Ni element to form highly defective Pt 3 Ni nanoframes. The method needs to synthesize nanoparticles first, and then use segregation and etching to realize the preparation of nanoframes (Bahadori et al, 2020). In addition, it can also be obtained by template method and replacement method (Nosheen et al, 2019).…”

Section: General Effectmentioning

confidence: 99%

Atomic Regulation of PGM Electrocatalysts for the Oxygen Reduction Reaction

Chen

Zhao

et al. 2021

Front. Chem.

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With the increasing enthusiasm for the hydrogen economy and zero-emission fuel cell technologies, intensive efforts have been dedicated to the development of high-performance electrocatalytic materials for the cathodic oxygen reduction reaction (ORR). Some major fundamental breakthroughs have been made in the past few years. Therefore, reviewing the most recent development of platinum-group-metal (PGM) ORR electrocatalysts is of great significance to pushing it forward. It is known that the ORR on the fuel cell electrode is a heterogeneous reaction occurring at the solid/liquid interface, wherein the electron reduces the oxygen along with species in the electrolyte. Therefore, the ORR kinetic is in close correlation with the electronic density of states and wave function, which are dominated by the localized atomic structure including the atomic distance and coordination number (CN). In this review, the recent development in the regulation over the localized state on the catalyst surface is narrowed down to the following structural factors whereby the corresponding strategies include: the crystallographic facet engineering, phase engineering, strain engineering, and defect engineering. Although these strategies show distinctive features, they are not entirely independent, because they all correlate with the atomic local structure. This review will be mainly divided into four parts with critical analyses and comparisons of breakthroughs. Meanwhile, each part is described with some more specific techniques as a methodological guideline. It is hoped that the review will enhance an insightful understanding on PGM catalysts of ORR with a visionary outlook.

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“…MNPs are also important catalysts due to their great surface area per volume and contain large numbers of active sites. Cobalt oxide show exceptional magnetic, electronic, and catalytic properties [9]. Cobalt has a beneficial effect on human health [10,11].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Reductive Degradation of 4-Nitrophenol and Methyl orange by Novel Cobalt Oxide Nanocomposites

Bukhamsin,

Hammud,

Awada

et al. 2024

Catalysts

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Cobalt oxide nanocomposites were synthesized and used for the catalytic degradation of 4-nitrophenol (4-NP) and methyl orange (MO). Cobalt oxide nanocomposites PyroHAB9 was prepared by heating cobalt acetylacetonate complex HAB9 at 300 °C, while PyroHAB19 was prepared by heating cobalt acetylacetonate–carboxymethyl cellulose complex at 300 °C. FTIR indicated the presence of Co3O4 species, while Raman spectrum indicated the presence of graphite in PyroHAB19. The SEM morphology of nanocomposites exhibited irregular spherical shape nanoparticles with sizes ranging between 20 to 60 nm. Additionally, nanowires were also seen in HAB19. Also, 2Ɵ peaks in PXRD revealed the formation of Co3O4 in HAB19. Cyclic voltammetry indicated enhanced electrochemical redox activity of HAB19. The structures of the nanocomposites were related to their catalytic activities. The turnover frequency (TOF) values of the catalytic reduction of p-nitrophenol (P-NP) and methyl orange (MO) were greater for HAB19 compared to HAB9 nano-catalysts. Also, the TOF values of the catalytic reduction of MO were greater than that of P-NP by both nano-catalysts. It is obvious that the rate constants of catalytic reductions for MO by metal oxide nanocomposites were greater than the corresponding rate constants for PNP. The highest rate constant was found for PyroHAB19 in MO reduction.

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Synthesis of cobalt, palladium, and rhenium nanoparticles

Cited by 16 publications

References 182 publications

Plate-Like Colloidal Metal Nanoparticles

Plate-Like Colloidal Metal Nanoparticles

Atomic Regulation of PGM Electrocatalysts for the Oxygen Reduction Reaction

Catalytic Reductive Degradation of 4-Nitrophenol and Methyl orange by Novel Cobalt Oxide Nanocomposites

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