Gold nanoparticles on metal oxide surfaces derived from n-alkanethiolate-stabilized gold nanoparticles; investigations of the adsorption mechanism and sulfate formation during subsequent thermolysis

Almukhlifi, Hanadi A.; Burns, Robert C.

doi:10.1016/j.apcata.2015.05.029

Cited by 16 publications

(17 citation statements)

References 58 publications

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“…The resulting n-C6SAu nanoparticles were dried in the atmosphere. Thermogravimetric/differential thermal analysis in flowing air showed that the n-C6SAu nanoparticles thermally decomposed at 220 o C and had a %Au content of 83.0% [34]. The n-C6SAu nanoparticles were loaded onto the ternary oxide catalysts using the approach described by Zheng and Stucky [31].…”

Section: Methodsmentioning

confidence: 99%

“…Examination of the five pyrovanadates by FT-IR (attenuated total reflectance) showed surface bands for sulfate in all cases, although they were weak. The typically strong triply degenerate 3 (S-O) stretching band at about 1130-1140 cm -1 [57] was generally split into several peaks indicating C3v (two peaks) or C2v (three peaks) environments [34,57]. These likely correspond to triply and doubly bridged S-O linkages, respectively [34].…”

Section: Oxidative Dehydrogenation Of Isobutane Over 5 Wt% Au/m2v2o7 mentioning

confidence: 97%

“…The parent n-hexanethiolate-stabilised gold nanoparticles used in the present studies were found by TEM to have an average particle size of 2.0 ± 0.2 nm. Assuming a monodisperse particle size of 2.0 nm, and that the n-C6SAu nanoparticles remain spherical on adsorption, it has been shown that an oxide requires a surface area of some 6 m 2 g -1 for complete adsorption [34], which is higher than the specific surface areas of all the five parent pyrovanadates (Table 4).…”

Section: Oxidative Dehydrogenation Of Isobutane Over 5 Wt% Au/m2v2o7 mentioning

confidence: 99%

“…The catalysis studies were carried out using a fixed-bed flow reactor that has been described previously [34]. analyses by GC were performed, the average of which was taken as representative of the unreacted isobutane and products at that temperature.…”

Section: Catalysis Studiesmentioning

confidence: 99%

“…Following isolation, the resulting solids were thermolysed at 340 o C for 1 hour in air to generate the gold nanoparticles and remove the organo-and/or organosulfur-thermolysis products, with minimum adsorption of sulfur-containing species on the catalyst surface [32][33][34]. and 65 hours, respectively [35,36].…”

Section: Introductionmentioning

confidence: 99%

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Oxidative dehydrogenation of isobutane to isobutene by pyrovanadates, M 2 V 2 O 7 , where M(II) = Mn, Co, Ni, Cu and Zn, and Co 2 VO 4 and ZnV 2 O 4 : The effect of gold nanoparticles

Almukhlifi

Burns

2015

Journal of Molecular Catalysis A: Chemical

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Section: Methodsmentioning

confidence: 99%

Section: Oxidative Dehydrogenation Of Isobutane Over 5 Wt% Au/m2v2o7 mentioning

confidence: 97%

Section: Oxidative Dehydrogenation Of Isobutane Over 5 Wt% Au/m2v2o7 mentioning

confidence: 99%

Section: Catalysis Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Oxidative dehydrogenation of isobutane to isobutene by pyrovanadates, M 2 V 2 O 7 , where M(II) = Mn, Co, Ni, Cu and Zn, and Co 2 VO 4 and ZnV 2 O 4 : The effect of gold nanoparticles

Almukhlifi

Burns

2015

Journal of Molecular Catalysis A: Chemical

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Creation of High‐Performance Heterogeneous Photocatalysts by Controlling Ligand Desorption and Particle Size of Gold Nanocluster

et al. 2021

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Recently,the creation of new heterogeneous catalysts using the unique electronic/geometric structures of small metal nanoclusters (NCs) has received considerable attention. However,t oa chieve this,i ti se xtremely important to establish methods to remove the ligands from ligand-protected metal NCs while preventing the aggregation of metal NCs.I nt his study,t he ligand-desorption process during calcination was followed for metal-oxide-supported 2-phenylethanethiolateprotected gold (Au) 25-atom metal NCs using five experimental techniques.The results clearly demonstrate that the liganddesorption process consists of ligand dissociation on the surface of the metal NCs,a dsorption of the generated compounds on the support and desorption of the compounds from the support, and the temperatures at which these processes occurred were elucidated. Based on the obtained knowledge,w ee stablished am ethod to form am etal-oxide layer on the surface of Au NCs while preventing their aggregation, therebys ucceeding in creating aw ater-splitting photocatalyst with high activity and stability.

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Creation of High‐Performance Heterogeneous Photocatalysts by Controlling Ligand Desorption and Particle Size of Gold Nanocluster

et al. 2021

View full text Add to dashboard Cite

Recently, the creation of new heterogeneous catalysts using the unique electronic/geometric structures of small metal nanoclusters (NCs) has received considerable attention. However, to achieve this, it is extremely important to establish methods to remove the ligands from ligand‐protected metal NCs while preventing the aggregation of metal NCs. In this study, the ligand‐desorption process during calcination was followed for metal‐oxide‐supported 2‐phenylethanethiolate‐protected gold (Au) 25‐atom metal NCs using five experimental techniques. The results clearly demonstrate that the ligand‐desorption process consists of ligand dissociation on the surface of the metal NCs, adsorption of the generated compounds on the support and desorption of the compounds from the support, and the temperatures at which these processes occurred were elucidated. Based on the obtained knowledge, we established a method to form a metal‐oxide layer on the surface of Au NCs while preventing their aggregation, thereby succeeding in creating a water‐splitting photocatalyst with high activity and stability.

show abstract

Gold nanoparticles on metal oxide surfaces derived from n-alkanethiolate-stabilized gold nanoparticles; investigations of the adsorption mechanism and sulfate formation during subsequent thermolysis

Cited by 16 publications

References 58 publications

Oxidative dehydrogenation of isobutane to isobutene by pyrovanadates, M 2 V 2 O 7 , where M(II) = Mn, Co, Ni, Cu and Zn, and Co 2 VO 4 and ZnV 2 O 4 : The effect of gold nanoparticles

Oxidative dehydrogenation of isobutane to isobutene by pyrovanadates, M 2 V 2 O 7 , where M(II) = Mn, Co, Ni, Cu and Zn, and Co 2 VO 4 and ZnV 2 O 4 : The effect of gold nanoparticles

Creation of High‐Performance Heterogeneous Photocatalysts by Controlling Ligand Desorption and Particle Size of Gold Nanocluster

Creation of High‐Performance Heterogeneous Photocatalysts by Controlling Ligand Desorption and Particle Size of Gold Nanocluster

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