Carbon nanotube supported Pt electrodes for methanol oxidation: A comparison between multi- and single-walled carbon nanotubes

Wu, Gang; Xu, Bin

doi:10.1016/j.jpowsour.2007.08.024

Cited by 164 publications

(104 citation statements)

References 48 publications

Supporting

Mentioning

101

Contrasting

Unclassified

Order By: Relevance

“…B-MWCNTs had the smallest pore size of 6.57 nm ( Table 2). The values are consistent with literature (Wu et al 2007). The CNTs used in this study were all mesoporous materials because they all have average pore sizes between 2 and 50 nm (Chen et al 2006).…”

Section: Characterization and Co 2 Adsorption Testsupporting

confidence: 93%

Synthesis and evaluation of carbon nanotubes composite adsorbent for CO2 capture: a comparative study of CO2 adsorption capacity of single-walled and multi-walled carbon nanotubes

Osler

Dheda

Ngoy

et al. 2017

Int J Coal Sci Technol

View full text Add to dashboard Cite

As a preliminary investigation towards obtaining carbon nanotube composite adsorbent for CO 2 capture, in this study CO 2 adsorption performance of three commercial carbon nanotubes (CNTs) one single-walled carbon nanotubes (SWCNTs), and two (2) different multi-walled carbon nanotubes (referred to as A-MWCNTs and B-MWCNTs) were evaluated and compared. The purpose of this study was to compare the different types of CNTs and select the best to serve as the solid anchor in the development of a hydrophobic composite adsorbent material for CO 2 capture. The N 2 physisorption of the CNTs was conducted to determine their surface area, pore volume and pore size. In addition, morphology and purity of the CNTs were checked with Transmission Electron Microscopy and Raman Spectroscopy, respectively. The CO 2 adsorption capacity of the CNTs was evaluated using Thermo-gravimetric analysis (TGA) at 1.1 bar, at operating temperature ranged from 25 to 55°C and at different CO 2 feed flow rates, in order to evaluate the effects of these variables on the CO 2 adsorption capacity. The results of CO 2 adsorption with the TGA show that CO 2 adsorption capacity for both SWCNTs and MWCNTs was the highest at 25°C. Changing the CO 2 flowrates had no significant effect on the adsorption capacity of MWCNTs, but decreasing the CO 2 flow rate resulted in the enhancement of the CO 2 adsorption capacity of SWCNTs. Overall, it was found that the SWCNTs displayed the highest CO 2 adsorption capacity (29.97 gCO 2 /kg adsorbent) when compared to the MWCNTs (12.09 gCO 2 /kg adsorbent), indicating a 150% increase in adsorption capacity over MWCNTs.

show abstract

Section: Characterization and Co 2 Adsorption Testsupporting

confidence: 93%

Synthesis and evaluation of carbon nanotubes composite adsorbent for CO2 capture: a comparative study of CO2 adsorption capacity of single-walled and multi-walled carbon nanotubes

Osler

Dheda

Ngoy

et al. 2017

Int J Coal Sci Technol

View full text Add to dashboard Cite

show abstract

“…The result of both wash-out or aggregation of the catalyst is manifested in a decrease in the catalyst ECSA (Electro-Chemical Surface Area) in the case of precious group metal catalysts (PGMCs), or leaching and dissolution in the case of non-precious group metal catalysts (NPGMCs). One way to improve the stability of electrodes from corrosion in FCs is by the use of graphitic, nano-structured carbon materials, such as graphene nano-sheets, carbon nanotubes, and carbon nanofibers as catalyst supports [9][10][11][12]. The high degree of graphitized structures of these compounds provides a higher resistance to chemical and electrochemical oxidation.…”

Section: Introductionmentioning

confidence: 99%

Advances in Ceramic Supports for Polymer Electrolyte Fuel Cells

Lori

Elbaz

2015

Catalysts

View full text Add to dashboard Cite

Durability of catalyst supports is a technical barrier for both stationary and transportation applications of polymer-electrolyte-membrane fuel cells. New classes of non-carbon-based materials were developed in order to overcome the current limitations of the state-of-the-art carbon supports. Some of these materials are designed and tested to exceed the US DOE lifetime goals of 5000 or 40,000 hrs for transportation and stationary applications, respectively. In addition to their increased durability, the interactions between some new support materials and metal catalysts such as Pt result in increased catalyst activity. In this review, we will cover the latest studies conducted with ceramic supports based on carbides, oxides, nitrides, borides, and some composite materials.

show abstract

“…Replacing the classical carbon-black supports such as Vulcan XC-72, may influence the catalytic activity significantly [19,20,21,22,23]. For example, we recently showed that there is a significant gain in terms of the activity for the methanol oxidation reaction if XC-72 is replaced by carbon nanofibers [24].…”

Section: Introductionmentioning

confidence: 99%

Stability of carbon nanofibre-supported platinum catalysts in the presence of chloride under controlled mass-transfer conditions

Briskeby

Tsypkin

Tunold

et al. 2014

Journal of Power Sources

View full text Add to dashboard Cite

The effect of chloride on the stability of platinum electrocatalysts was studied by rotating disk measurements in sulfuric acid electrolyte with a continuously increasing concentration of chloride anions. The activity towards oxygen reduction was found to be reduced by a factor of seven when 140 ppm chloride was present. Platinum corrosion was severe at high potentials, presumably accelerated by potential cycling, and greatly enhanced by mass transport. A five-fold increase in corrosion rate was found when the electrode was rotated at 1600 rpm with respect to stagnant conditions. At potentials where oxygen reduction occurs, dissolved Pt can be redeposited on the electrode. The Pt dissolution rate increased with increasing Cl -concentration up to 20 ppm. Above this threshold the corrosion rate was unaffected by increases in Cl -content.

show abstract

Carbon nanotube supported Pt electrodes for methanol oxidation: A comparison between multi- and single-walled carbon nanotubes

Cited by 164 publications

References 48 publications

Synthesis and evaluation of carbon nanotubes composite adsorbent for CO2 capture: a comparative study of CO2 adsorption capacity of single-walled and multi-walled carbon nanotubes

Synthesis and evaluation of carbon nanotubes composite adsorbent for CO2 capture: a comparative study of CO2 adsorption capacity of single-walled and multi-walled carbon nanotubes

Advances in Ceramic Supports for Polymer Electrolyte Fuel Cells

Stability of carbon nanofibre-supported platinum catalysts in the presence of chloride under controlled mass-transfer conditions

Contact Info

Product

Resources

About