The ternary catalyst Pt75Ru5Ni20 was conducted on various types of carbon supports including functionalized Vulcan XC-72R(f-CB),functionalized multi-walled carbon nanotubes(f-MWCNT),and mesoporous carbon(PC-Zn-succini...The ternary catalyst Pt75Ru5Ni20 was conducted on various types of carbon supports including functionalized Vulcan XC-72R(f-CB),functionalized multi-walled carbon nanotubes(f-MWCNT),and mesoporous carbon(PC-Zn-succinic)by sodium borohydride chemical reduction method to improve the ethanol electrooxidation reaction(EOR)for direct ethanol fuel cell(DEFC).It was found that the particle size of the metals on f-MWCNT was 5.20 nm with good particle dispersion.The alloy formation of ternary catalyst was confirmed by XRD and more clearly described by SEM element mapping,which was relevant to the efficiency of the catalysts.Moreover,the mechanism of ethanol electrooxidation reaction based on the surface reaction was more understanding.The activity and stability for ethanol electrooxidation reaction(EOR)were investigated using cyclic voltammetry and chronoamperometry,respectively.The highest activity and stability for EOR were observed from Pt75Ru5Ni20/f-MWCNT due to a good metal-carbon interaction.Ru and Ni presented in Pt-Ru-Ni alloy improved the activity and stability of ternary catalysts for EOR.Moreover,the reduction of Pt content in ternary catalyst led to the catalyst cost deduction in DEFC.展开更多
A sensitive electrochemical sensor for the determination of cysteamine （CA） was developed using a modified multiwall carbon nanotube paste electrode （MWCNTPE） with isoproterenol （ISPT） as a mediator. This modifi...A sensitive electrochemical sensor for the determination of cysteamine （CA） was developed using a modified multiwall carbon nanotube paste electrode （MWCNTPE） with isoproterenol （ISPT） as a mediator. This modified electrode showed very high electrocatalytic activity for the anodic oxidation of CA. Under the optimized conditions, the electrocatalytic peak current showed a linear relationship with CA concentration in the range of 0.3-450.0 μmol/L with a detection limit of 0.09 μmol/L CA. The modified electrode was used for the determination of CA in real samples such as urine and drug samples.展开更多
基金supported by the Institutional Research Grant(Thailand Research Fund:IRG598004)
文摘The ternary catalyst Pt75Ru5Ni20 was conducted on various types of carbon supports including functionalized Vulcan XC-72R(f-CB),functionalized multi-walled carbon nanotubes(f-MWCNT),and mesoporous carbon(PC-Zn-succinic)by sodium borohydride chemical reduction method to improve the ethanol electrooxidation reaction(EOR)for direct ethanol fuel cell(DEFC).It was found that the particle size of the metals on f-MWCNT was 5.20 nm with good particle dispersion.The alloy formation of ternary catalyst was confirmed by XRD and more clearly described by SEM element mapping,which was relevant to the efficiency of the catalysts.Moreover,the mechanism of ethanol electrooxidation reaction based on the surface reaction was more understanding.The activity and stability for ethanol electrooxidation reaction(EOR)were investigated using cyclic voltammetry and chronoamperometry,respectively.The highest activity and stability for EOR were observed from Pt75Ru5Ni20/f-MWCNT due to a good metal-carbon interaction.Ru and Ni presented in Pt-Ru-Ni alloy improved the activity and stability of ternary catalysts for EOR.Moreover,the reduction of Pt content in ternary catalyst led to the catalyst cost deduction in DEFC.
基金Majlesi Branch,Islamic Azad University,Isfahan,Iran for their support
文摘A sensitive electrochemical sensor for the determination of cysteamine （CA） was developed using a modified multiwall carbon nanotube paste electrode （MWCNTPE） with isoproterenol （ISPT） as a mediator. This modified electrode showed very high electrocatalytic activity for the anodic oxidation of CA. Under the optimized conditions, the electrocatalytic peak current showed a linear relationship with CA concentration in the range of 0.3-450.0 μmol/L with a detection limit of 0.09 μmol/L CA. The modified electrode was used for the determination of CA in real samples such as urine and drug samples.
