In situ thermolysis of Pt-carbonyl complex to form supported clean Pt nanoclusters with enhanced catalytic performance

Wei, Guijuan; Zhao, Xixia; An, Changhua; Liu, Junxue; Wang, Zhaojie; Du, Kun; Zhang, Jun

doi:10.1007/s40843-016-5144-5

Cited by 4 publications

(5 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Metal nanoclusters consisting of a few to tens of metal atoms possess unique molecular-like structure and discrete electronic energy levels, rendering them diverse applications in catalysis, sensing, imaging, labeling, electrochemistry, and so forth − Among them, ultrasmall nanoclusters with metal atom nuclearity less than 10 − have higher surface-to-volume ratio than the larger ones and exhibit fantastic properties because of the extreme size sensitivity of the physiochemical in this size region. For both fundamental science and technical applications, it is desired to obtain atomically monodisperse nanoclusters with good control over the atom nuclearity and composition, which depends critically on the design and implementation of solution-based synthetic chemistry. − Among a diversity of metal nanoclusters, gold nanoclusters have been a representative class and studied most extensively.…”

Section: Introductionmentioning

confidence: 99%

Ammonia-Induced Size Convergence of Atomically Monodisperse Au₆Nanoclusters

Huang

et al. 2018

J. Phys. Chem. C

View full text Add to dashboard Cite

Developing effective synthetic protocols for atomically monodisperse Au nanoclusters is pivotal to their fundamental science and applications. Here, we present a novel synthetic protocol toward atomically monodisperse [Au 6 (PPh 3 ) 6 ] 2+ nanoclusters (abbreviated as Au 6 ) via ammonia-induced size convergence from polydisperse Au x (x = 6−11) nanocluster mixture. The analogous ammonia-induced size conversion reactions starting from individually prepared Au 7 and Au 9 nanoclusters to Au 6 were traced by time-dependent ultraviolet−visible absorption and electrospray ionization mass spectra. It is observed that in both cases the size conversion is achieved through gradual release of the ion−molecule complex [NH 4 AuPPh 3 Cl] + from the larger Au nanoclusters until the formation of thermodynamically stable Au 6 nanoclusters with the stability against the etching reaction. The role of ammonia ions in this size convergence synthesis is to accelerate the depletion of [Au(PPh 3 )] + fragments from the PPh 3 -protected Au nanoclusters, by the formation of the stable complex [NH 4 AuPPh 3 Cl] + .

show abstract

Section: Introductionmentioning

confidence: 99%

Ammonia-Induced Size Convergence of Atomically Monodisperse Au₆Nanoclusters

Huang

et al. 2018

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

“…Tuning the electronic property of transition metal plays an important role in the selective catalysis, and the electrons transfer usually occurs by means of coordinated or covalent bonds . Metal phosphides (M‐P) including metal‐P covalent bonds have been extensively studied in heterogeneous catalysis .…”

Section: Figurementioning

confidence: 99%

Electronic Modulation of Palladium in Metal Phosphide Nanoparticles for Chemoselective Reduction of Halogenated Nitrobenzenes

Zhao

Feng

Qiao

et al. 2019

Chemistry An Asian Journal

View full text Add to dashboard Cite

Tuning the electronic propertyo fat ransition metal plays an importantr ole in the selectivec atalysis. Herein, the control synthesis of (Pd x Ni y )-P nanoparticles is reported. The binding energy of Pd3d 5/2 as af unctiono f x/y ratio is wellt unable from 335.3 to 335.9 eV.T he composition-induced electronic modulation was correlated with the selectivecatalysis of (Pd x Ni y )-P in the reduction of halogenated nitrobenzenes.T he electro-deficiency of Pd helped to improvet he selectivity.T he amorphous (Pd 38 Ni 26 )P 36 /C performed an exceptional selectivityi n comparison with other related( Pd-Ni)-P/C, Pd 38 Ni 26 /C, and Pd/C. Various halogenated nitrobenzenes( chlorides, bromides, and iodide) were tolerant and the corresponding halogenated anilinesw ere obtained in high yields. This work provides some clues for the rational designofbimetallic phosphides with covalent interactions to boost the catalysis.Tuning the electronic property of transition metal plays an important role in the selectivecatalysis, and the electrons transfer usually occurs by meanso fc oordinated or covalentb onds. [1][2][3][4][5][6][7] Metal phosphides (M-P) including metal-P covalent bonds have been extensively studied in heterogeneousc atalysis. [8][9][10][11][12] They are synthesized by the co-reduction of metal precursor and phosphine in one pot. [12,13] The interaction between noble metal andm etalloid elementm ade the metal electronic deficient and also formed ah igh energy barrier for subsurface chemistry,segregation, and metal-hydride formation. [14][15][16] Thus, M-P have been employed as ac lass of efficient hydrogenation catalysts. [8,[10][11][12]16] Reduction of nitrobenzenes to access to substituted anilines is one of the critical issues in chemical transformationsa st he products are key intermediates for the fine chemical, agrochemical, and pharmaceutical industries. The selective reduction of the nitro group over other reducible groups in the same molecule is challenging. It is well known that Pd is a highly active catalystf or the reduction of nitrobenzenes,a nd many efforts have been made mainly based on the support or ligand effects to control the selectivity of Pd-based catalysts. However, they have still serious limitations in the reactionc onditions or substrate generality. [17][18][19][20][21][22][23][24] For the production of halogenated aniline from the corresponding halogenated nitrobenzene, the preservation of carbon-halide (CÀX) bond is necessary. [25] Palladium and Ni-based materials are well knownand versatile catalysts for cross-couplingr eactions, due to their high ability to cleave C-X bonds. [26][27][28] These bonds become morei nstable when coupled with nitro group. Therefore, it is still a challenge using Pd-or Ni-based materials to catalyze the selective reduction of halogenated nitrobenzenes to the corresponding halogenateda nilines, compared with Pt catalysts. [29] It was reported that the electron-rich Pd couldl ower energy barrierf or the cleavage of the CÀXb ond. [3] On the contrary, electronic...

show abstract

“…Direct methanol fuel cells (DMFCs) have been regarded as a promising energy-converting device, owing to their outstanding advantages, such as excellent energy-converting efficiency, low operating temperature, and environmentally friendly. − The oxidation of methanol on the anode of DMFCs is a critical factor that determines the overall performances of the DMFCs. At present, Pt has been applied as a benchmark electrocatalyst for the methanol oxidation reaction. − However, pure Pt as the electrocatalyst has some shortcomings, such as the high price, scarcity, and weak resistance to CO poison. , Therefore, it is necessary to develop advanced electrocatalysts with merits of low cost, low Pt usage, high catalytic activity, and long-term durability. To this end, Pt alloys composed of Pt and cheap transition metals were developed as electrocatalysts for DMFCs. − The alloying of Pt with cheap transition metals can reduce the consumption of Pt and, thus, reduce the cost.…”

Section: Introductionmentioning

confidence: 99%

PtFeCu Concave Octahedron Nanocrystals as Electrocatalysts for the Methanol Oxidation Reaction

et al. 2019

View full text Add to dashboard Cite

In this work, PtFeCu concave octahedron nanocrystals were synthesized by a one-pot solvothermal method. The PtFeCu concave octahedron nanocrystals were applied as an electrocatalyst for the electrooxidation of methanol and have shown high electrocatalytic activity and long-term durability. The electrocatalysis performances of the PtFeCu concave octahedron nanocrystals are better than those of the PtFe and PtCu nanocrystals and commercial Pt/C. The synergistic effect of the Pt, Fe, and Cu metals and the unique concave octahedron morphology may be the main cause of the superior electrocatalytic performances of the PtFeCu nanocrystals. The PtFeCu concave octahedron nanocrystals have a potential application as an anode catalyst for direct methanol fuel cells.

show abstract

In situ thermolysis of Pt-carbonyl complex to form supported clean Pt nanoclusters with enhanced catalytic performance

Cited by 4 publications

References 45 publications

Ammonia-Induced Size Convergence of Atomically Monodisperse Au₆Nanoclusters

Ammonia-Induced Size Convergence of Atomically Monodisperse Au₆Nanoclusters

Electronic Modulation of Palladium in Metal Phosphide Nanoparticles for Chemoselective Reduction of Halogenated Nitrobenzenes

PtFeCu Concave Octahedron Nanocrystals as Electrocatalysts for the Methanol Oxidation Reaction

Contact Info

Product

Resources

About

In situ thermolysis of Pt-carbonyl complex to form supported clean Pt nanoclusters with enhanced catalytic performance

Cited by 4 publications

References 45 publications

Ammonia-Induced Size Convergence of Atomically Monodisperse Au6Nanoclusters

Ammonia-Induced Size Convergence of Atomically Monodisperse Au6Nanoclusters

Electronic Modulation of Palladium in Metal Phosphide Nanoparticles for Chemoselective Reduction of Halogenated Nitrobenzenes

PtFeCu Concave Octahedron Nanocrystals as Electrocatalysts for the Methanol Oxidation Reaction

Contact Info

Product

Resources

About

Ammonia-Induced Size Convergence of Atomically Monodisperse Au₆Nanoclusters

Ammonia-Induced Size Convergence of Atomically Monodisperse Au₆Nanoclusters