Recent development in the preparation of nanoparticles as fuel cell catalysts

Zhu, Fengfeng; Kim, Jaemin; Tsao, Kai Chieh; Zhang, Junliang; Yang, Hong

doi:10.1016/j.coche.2015.03.005

Cited by 24 publications

(15 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the main applications of the 'toolbox' approach is therefore the preparation of surfactantfree Pt nanoparticles supported on carbon support (Pt/C) catalysts. 46 Potential / V vs RHE peak around 0.8 V. A higher NaOH/Pt molar ratio, and thus smaller Pt particle size, leads to a shift of the oxide reduction peak to lower potentials and can be explained by the higher oxophilicity of smaller Pt nanoparticles. 47 This is in agreement with ORR tests summarized in Table 1 (see also Figure S5-S8).…”

Section: Electrochemical Characterization Of Carbon Supported Pt Nanomentioning

confidence: 99%

Investigating Particle Size Effects in Catalysis by Applying a Size-Controlled and Surfactant-Free Synthesis of Colloidal Nanoparticles in Alkaline Ethylene Glycol: Case Study of the Oxygen Reduction Reaction on Pt

et al. 2018

View full text Add to dashboard Cite

Colloidal platinum nanoparticles are obtained via a surfactant-free polyol process in alkaline ethylene glycol. In this popular synthesis, ethylene glycol functions as solvent and reducing agent. The preparation procedure is known for its reproducibility to obtain 1-2 nm nanoparticles, but at the same time the controlled preparation of larger nanoparticles is challenging. A reliable size control without the use of surfactants is a fundamental yet missing achievement for systematic investigations. In this work it is demonstrated how the molar ratio between NaOH and the platinum precursor determines the final particle size and how this knowledge can be used to prepare and study in a systematic way supported catalysts with defined size and Pt to carbon ratio. Using small-angle X-ray scattering, transmission electron microscopy, infrared spectroscopy, X-ray absorption spectroscopy, pair distribution function and electrochemical analysis it is shown that changing the NaOH/Pt molar ratio from 25 to 3, the Pt nanoparticle size is tuned from 1 to 5 nm. This size range is of interest for various catalytic applications, such as the oxygen reduction reaction (ORR). Supporting the nanoparticles onto a high surface area carbon, we demonstrate how the particle size effect can be studied keeping the Pt to carbon ratio constant, an important aspect that in previous studies could not be accomplished.

show abstract

Section: Electrochemical Characterization Of Carbon Supported Pt Nanomentioning

confidence: 99%

Investigating Particle Size Effects in Catalysis by Applying a Size-Controlled and Surfactant-Free Synthesis of Colloidal Nanoparticles in Alkaline Ethylene Glycol: Case Study of the Oxygen Reduction Reaction on Pt

et al. 2018

View full text Add to dashboard Cite

show abstract

“…[8] (3)Simple processing of the nanomaterials must be achieved to facilitatet heir applications, for example, by achieving (re)dispersion in suitable [9] and ideally green [10] solvents. To meet these criteria,w et-chemistry methods [11] such as colloidal syntheses [12] are suitable options because they are compatible with large-scale production. [9c] They are also challenging because high-boiling-point solvents are typically used, which implies energy-and resource-intensive solventr emoval and/or washing steps to process the NPs.…”

Section: Introductionmentioning

confidence: 99%

“…It is demonstrated how the synthesis can be accelerated,h ow size control is achieved, and how the colloidal dispersions can be stabilized withoutt he use of surfactants. Despite being surfactant-free, the Pt NPs exhibit surprisingly long-term (up to 16 months) stability in water over a wide pH range (4)(5)(6)(7)(8)(9)(10)(11)(12) and in aqueous buffer solutions. The Co4Catp rocess is thus relevant to produce NPs forh eterogeneous catalysis, electro-catalysis, or bio/medical applications.…”

Section: Introductionmentioning

confidence: 99%

Controlled Synthesis of Surfactant‐Free Water‐Dispersible Colloidal Platinum Nanoparticles by the Co4Cat Process

et al. 2019

View full text Add to dashboard Cite

The recently reported Co4Cat process is a synthesis method bearing ecological and economic benefits to prepare precious‐metal nanoparticles (NPs) with optimized catalytic properties. In the Co4Cat process, a metal precursor (e.g., H2PtCl6) is dissolved in an alkaline solution of a low‐boiling‐point solvent (methanol) and reduced to NPs at low temperature (<80 °C) without the use of surfactants. Here, the Co4Cat process to prepare Pt NPs is described in detail. The advantages of this new synthesis method for research and development but also industrial production are highlighted in a comparison with the popular “polyol” synthesis. The reduction of H2PtCl6 from PtIV to PtII and further to Pt0 is followed by UV/Vis and XANES/EXAFS measurements. It is demonstrated how the synthesis can be accelerated, how size control is achieved, and how the colloidal dispersions can be stabilized without the use of surfactants. Despite being surfactant‐free, the Pt NPs exhibit surprisingly long‐term (up to 16 months) stability in water over a wide pH range (4–12) and in aqueous buffer solutions. The Co4Cat process is thus relevant to produce NPs for heterogeneous catalysis, electro‐catalysis, or bio/medical applications.

show abstract

“…Meng et al, 2015;G omez et al, 2016), particularly in the cathodic reduction of O 2 (He et al, 2005) which is rate-limiting. Reducing Pt costs/loadings could also be achieved by optimizing Pt nanoparticles (via size control and increased uniformity), or by developing alloys (Zhu et al, 2015). Developments towards microbially derived fuel cell catalysts are shown in Table 1.…”

Section: Fuel Cell Electrocatalystsmentioning

confidence: 99%

Metallic bionanocatalysts: potential applications as green catalysts and energy materials

Macaskie

Mikheenko

Omajai

et al. 2017

Microbial Biotechnology

View full text Add to dashboard Cite

SummaryMicrobially generated or supported nanocatalysts have potential applications in green chemistry and environmental application. However, precious (and base) metals biorefined from wastes may be useful for making cheap, low‐grade catalysts for clean energy production. The concept of bionanomaterials for energy applications is reviewed with respect to potential fuel cell applications, bio‐catalytic upgrading of oils and manufacturing ‘drop‐in fuel’ precursors. Cheap, effective biomaterials would facilitate progress towards dual development goals of sustainable consumption and production patterns and help to ensure access to affordable, reliable, sustainable and modern energy.

show abstract

Recent development in the preparation of nanoparticles as fuel cell catalysts

Cited by 24 publications

References 67 publications

Investigating Particle Size Effects in Catalysis by Applying a Size-Controlled and Surfactant-Free Synthesis of Colloidal Nanoparticles in Alkaline Ethylene Glycol: Case Study of the Oxygen Reduction Reaction on Pt

Investigating Particle Size Effects in Catalysis by Applying a Size-Controlled and Surfactant-Free Synthesis of Colloidal Nanoparticles in Alkaline Ethylene Glycol: Case Study of the Oxygen Reduction Reaction on Pt

Controlled Synthesis of Surfactant‐Free Water‐Dispersible Colloidal Platinum Nanoparticles by the Co4Cat Process

Metallic bionanocatalysts: potential applications as green catalysts and energy materials

Contact Info

Product

Resources

About