Probing Nucleation Pathways for Morphological Manipulation of Platinum Nanocrystals

Yao, Takeshi; Liu, Shoujie; Sun, Zhihu; Li, Yuanyuan; Sun, He; Cheng, Hao; Xie, Yi; Liu, Qinghua; Jiang, Yong; Wu, Ziyu; Pan, Zhiyun; Yan, Wensheng; Wei, Shiqiang

doi:10.1021/ja302642x

Cited by 77 publications

(88 citation statements)

References 46 publications

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“…Instead, they limit the nucleation, hinder the combination of growing clusters, and as a result promote regular growth (isotropic) forms. By this hypothesis, it can be assumed that the increase of 15 We believe that these complexes are the genesis to produce nanodendrites.…”

Section: Effect Of Metal Precursor On Catalytic Activitymentioning

confidence: 99%

Particle shape optimization by changing from an isotropic to an anisotropic nanostructure: preparation of highly active and stable supported Pt catalysts in microemulsions

et al. 2013

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We recently introduced a new method to synthesize an active and stable Pt catalyst, namely thermo- Schomäcker, J. Mater. Chem., 2012, 22 (23), 11605-11614). We are able to produce Pt nanocrystals with a small size (2.5 nm) of an isotropic structure i.e. truncated octahedral and deposit them well on support materials. Although we have obtained good results, the performance of the catalyst still needed to be improved and optimized. We followed the strategy to retain the small size but change the shape to an anisotropic structure of Pt nanocrystals which produces more active sites by means of a weaker reducing agent. We found that our catalysts are more active than those we reported before and even show the potential to be applied in a challenging reaction such as hydrogenation of levulinic acid.

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Section: Effect Of Metal Precursor On Catalytic Activitymentioning

confidence: 99%

Particle shape optimization by changing from an isotropic to an anisotropic nanostructure: preparation of highly active and stable supported Pt catalysts in microemulsions

et al. 2013

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“…Wei and coworkers [92] developed an in-situ measurement combining QXAFS and UV-vis absorption spectroscopies to monitor the nucleation pathways in the solution synthesis of Pt nanocrystals. Figs 20a and b indicate that the morphologies of the resultant Pt nanocrystals are strongly dependent on the strength of reductants: a wire-like shape for weak reductant of ethylene glycol (EG) and a spherical shape for strong reductant of citric acid (CA).…”

Section: Reviewsmentioning

confidence: 99%

X-ray absorption fine structure spectroscopy in nanomaterials

et al. 2015

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X-ray absorption fine structure (XAFS) spectroscopy has been widely used for decades in a wide range of scientific fields, including physics, chemistry, biology, materials sciences, environmental sciences, etc. This review article is devoted to the applications of XAFS in nanomaterials. The basic principles of XAFS are briefly described from the view point of practical application, including its theory, data analysis and experiments. Using selected examples from recent literatures, the power of XAFS in determination of local atomic/electronic structures is illustrated for various nanomaterials, covering metal and semiconductor nanoparticles, catalysts, core/shell structures, ultrathin nanosheets, and so on. The utilization of time-resolved XAFS technique is also briefly introduced, for in-situ probing the nucleation/growth processes of nanomaterials and identifying reaction intermediates of nanostructured catalysts under operando conditions.

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“…China) and 1W1B station in BSRF (Beijing Synchrotron Radiation Facility, P.R. China) (Yao et al 2012). For this synthesis, K 2 PtCl 4 was used as a precursor, while either citric acid or ethylene glycol was used as a strong or weak reducing agent, respectively.…”

Section: Uv/vis Absorption Spectroscopymentioning

confidence: 99%

In situ monitoring metal-ligand exchange processes by optical spectroscopy and X-ray diffraction analysis: a review

Terraschke

Rothe

Lindenberg

2017

Reviews in Analytical Chemistry

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AbstractKnowledge about the mechanisms involved in the structural development of solid materials at the atomic level is essential for designing rational synthesis protocols for these compounds, which may be used to improve desired technical properties, such as light emission, conductivity, magnetism, porosity or particle size, and may allow the tailored design of solid materials to generate the aforementioned properties. Recent technological advancements have allowed the combination of synchrotron-based

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Probing Nucleation Pathways for Morphological Manipulation of Platinum Nanocrystals

Cited by 77 publications

References 46 publications

Particle shape optimization by changing from an isotropic to an anisotropic nanostructure: preparation of highly active and stable supported Pt catalysts in microemulsions

Particle shape optimization by changing from an isotropic to an anisotropic nanostructure: preparation of highly active and stable supported Pt catalysts in microemulsions

X-ray absorption fine structure spectroscopy in nanomaterials

In situ monitoring metal-ligand exchange processes by optical spectroscopy and X-ray diffraction analysis: a review

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