Re-evaluating the sulphidisation reaction on malachite surface through electrochemical and cryo XPS studies

Huai, Yangyang; Qian, Yupeng; Peng, Yongjun

doi:10.1016/j.apsusc.2020.147334

Cited by 20 publications

(4 citation statements)

References 33 publications

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“…Accordingly, the exclusive presence of Cu(II) ions in identical chemical environments near the surface could be verified without any doubt. Overall, the surface analysis confirmed all of the abovementioned structural properties related to the bismutite-analogous structures, allowing us to unequivocally state the success of Cu(II) incorporation . Finally, the most probable surface composition of the framework-modified copper-bismutite compositecalculated from XPS data (Figure D)was almost the same as was determined for the bulk with analytical measurements.…”

Section: Resultssupporting

confidence: 70%

Copper-Loaded Layered Bismuth Subcarbonate—Efficient Multifunctional Heterogeneous Catalyst for Concerted C–S/C–N Heterocyclization

Kocsis

Ötvös

Samu

et al. 2021

ACS Appl. Mater. Interfaces

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An efficient self-supported Cu(II)Bi(III) bimetallic catalyst with a layered structure was designed and developed. By careful characterization of the as-prepared material, the host structure was identified to exhibit a Sillen-type bismutite framework, with copper(II) ions being loaded as guests. The heterogeneous catalyst enabled C–N and C–S arylations under mild reaction conditions and with high chemoselectivities, thus furnishing valuable phenothiazines via heterocyclization with wide substrate tolerance. As corroborated by detailed catalytic studies, the cooperative, bifunctional catalyst, bearing Lewis acid sites along with copper(II) catalytic sites, facilitated an intriguing concerted C–N/C–S heterocyclization mechanism. The heterogeneous nature of the catalytic reactions was verified experimentally. Importantly, the catalyst was successfully recycled and reused multiple times, persevering its original structural order as well as its initial activity.

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Section: Resultssupporting

confidence: 70%

Copper-Loaded Layered Bismuth Subcarbonate—Efficient Multifunctional Heterogeneous Catalyst for Concerted C–S/C–N Heterocyclization

Kocsis

Ötvös

Samu

et al. 2021

ACS Appl. Mater. Interfaces

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“…The relationship shows that the catalytic activity of the hydrogen oxidation reaction (HOR) increases in the order of Pt(100) < Pt(110) < Pt(111) near the standard potential of hydrogen. Huai 21 employed electron transfer rate constants to simulate and re-evaluate the vulcanization reaction on malachite, combined with X-ray photoelectron spectroscopy (cryo-XPS) to characterize the corresponding surface morphology and confirmed the vulcanizing agent at two different concentrations, providing corresponding guidance for malachite flotation. Yao 22 disclosed detailed information on the kinetics and reaction mechanism of Cu( ii )/Cu( i ) redox reactions determined SECM in systems with excess chloride.…”

Section: Introductionmentioning

confidence: 99%

Micro-area investigation on electrochemical performance improvement with Co and Mn doping in PbO₂ electrode materials

Chen

et al. 2021

RSC Adv.

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“…As for CuOH-EPT, the S 2p spectrum shows a well-defined doublet at 162.0/163.3 eV, which can be assigned to the 2p 3/2 /2p 1/2 electrons of Cu-S, [53,54] consistent with the stabilization of CuOH by CuS interfacial bonds (Figure 2d). Notably, this species was totally absent in both CuOH-HC16 and CuOH-EPA, indicating that these samples were free of metal sulfide impurities.…”

Section: Resultsmentioning

confidence: 67%

Stable Cuprous Hydroxide Nanostructures by Organic Ligand Functionalization

et al. 2022

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chalcogenides, [5,6] halides, [7,8] and some complicated salts (e.g., Chevreul's salt), [9] which have found diverse applications, such as catalysis, [10,11] sensing, [12,13] energy conversion, [14,15] and optics. [16] Amongst these, cuprous oxide (CuOH) has long been attracting extensive interest. [17,18] Back in the early 1900s, Miller and Gillett observed that when a NaCl solution was electrolyzed with copper working electrodes at low temperatures (below 60 °C), yellow CuOH precipitates were produced. [19,20] Subsequently, several studies were conducted to investigate the characteristic structure and properties of CuOH synthesized via various methods. [21][22][23] Nevertheless, in these early studies, CuOH was mostly in the bulk solid form and structurally metastable, where the yellowish precipitates would rapidly change the color appearance to dark red, signifying the formation of Cu 2 O, upon exposure to the ambient or thermal treatment due to the lack of proper protection from oxidation and/or dehydration. Such structural instability makes it difficult to study the properties and applications of the obtained CuOH. In 2012, Korzhavyi et al. [24] carried out theoretical studies and demonstrated that CuOH could exist in a solid form; yet the metastability led to the formation of a random mixture of various configurations in the crystal structure, such as Cu 2 O and ice VII H 2 O. SorokaCopper compounds have been extensively investigated for diverse applications. However, studies of cuprous hydroxide (CuOH) have been scarce due to structural metastability. Herein, a facile, wet-chemistry procedure is reported for the preparation of stable CuOH nanostructures via deliberate functionalization with select organic ligands, such as acetylene and mercapto derivatives. The resulting nanostructures are found to exhibit a nanoribbon morphology consisting of small nanocrystals embedded within a largely amorphous nanosheet-like scaffold. The acetylene derivatives are found to anchor onto the CuOH forming CuC linkages, whereas CuS interfacial bonds are formed with the mercapto ligands. Effective electronic coupling occurs at the ligand-core interface in the former, in contrast to mostly nonconjugated interfacial bonds in the latter, as manifested in spectroscopic measurements and confirmed in theoretical studies based on first principles calculations. Notably, the acetylene-capped CuOH nanostructures exhibit markedly enhanced photodynamic activity in the inhibition of bacteria growth, as compared to the mercapto-capped counterparts due to a reduced material bandgap and effective photocatalytic generation of reactive oxygen species. Results from this study demonstrate that deliberate structural engineering with select organic ligands is an effective strategy in the stabilization and functionalization of CuOH nanostructures, a critical first step in exploring their diverse applications.

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Re-evaluating the sulphidisation reaction on malachite surface through electrochemical and cryo XPS studies

Cited by 20 publications

References 33 publications

Copper-Loaded Layered Bismuth Subcarbonate—Efficient Multifunctional Heterogeneous Catalyst for Concerted C–S/C–N Heterocyclization

Copper-Loaded Layered Bismuth Subcarbonate—Efficient Multifunctional Heterogeneous Catalyst for Concerted C–S/C–N Heterocyclization

Micro-area investigation on electrochemical performance improvement with Co and Mn doping in PbO₂ electrode materials

Stable Cuprous Hydroxide Nanostructures by Organic Ligand Functionalization

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Re-evaluating the sulphidisation reaction on malachite surface through electrochemical and cryo XPS studies

Cited by 20 publications

References 33 publications

Copper-Loaded Layered Bismuth Subcarbonate—Efficient Multifunctional Heterogeneous Catalyst for Concerted C–S/C–N Heterocyclization

Copper-Loaded Layered Bismuth Subcarbonate—Efficient Multifunctional Heterogeneous Catalyst for Concerted C–S/C–N Heterocyclization

Micro-area investigation on electrochemical performance improvement with Co and Mn doping in PbO2 electrode materials

Stable Cuprous Hydroxide Nanostructures by Organic Ligand Functionalization

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Micro-area investigation on electrochemical performance improvement with Co and Mn doping in PbO₂ electrode materials