Ultra-fine Pt nanoparticles supported on ionic liquid polymer-functionalized ordered mesoporous carbons for nonenzymatic hydrogen peroxide detection

In this work, graphitized ordered mesoporous carbons (gCMK-3) were employed as support for Pt and Pt–Ru nanoparticles synthesized by different reduction methods. The catalysts displayed metal contents and Pt:Ru atomic ratios close to 20 wt % and 1:1, respectively. A comparison of the physical parameters of Pt and Pt–Ru catalysts demonstrated that Ru enters into the Pt crystal structure, with well-dispersed nanoparticles on the carbon support. The Pt catalysts exhibited similar surface oxide composition, whereas a variable content of surface Pt and Ru oxides was found for the Pt–Ru catalysts. As expected, the Pt–Ru catalysts showed low CO oxidation onset and peak potentials, which were attributed to the high relative abundances of both metallic Pt and Ru oxides. All the studied catalysts exhibited higher maximum current densities than those observed for the commercial Pt and Pt–Ru catalysts, although the current–time curves at 0.6 V vs. reversible hydrogen electrode (RHE) demonstrated a slightly higher stationary current density in the case of the Pt/C commercial catalyst compared with Pt nanoparticles supported on gCMK-3s. However, the stationary currents obtained from the Pt–Ru/gCMK-3 catalysts surpassed those of the commercial Pt–Ru material, suggesting the suitability of the prepared catalysts as anodes for these devices.

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Pt nanoparticles entrapped in ordered mesoporous carbons: An efficient catalyst for the liquid-phase hydrogenation of nitrobenzene and its derivatives

Chinese Journal of Catalysis ◽

10.1016/s1872-2067(15)60937-8 ◽

2015 ◽

Vol 36 (11) ◽

pp. 1995-2003 ◽

Cited By ~ 7

Author(s):

Junrui Li ◽

Xiaohong Li ◽

Yue Ding ◽

Peng Wu

Keyword(s):

Liquid Phase ◽

Pt Nanoparticles ◽

Mesoporous Carbons ◽

Efficient Catalyst ◽

Ordered Mesoporous Carbons ◽

Liquid Phase Hydrogenation ◽

Ordered Mesoporous

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Capacitive Performance of Ordered Mesoporous Carbons in Ionic Liquids

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.284-286.2086 ◽

2011 ◽

Vol 284-286 ◽

pp. 2086-2089 ◽

Cited By ~ 1

Author(s):

Jin Zhou ◽

Shu Ping Zhuo

Keyword(s):

Ionic Liquid ◽

Liquid Electrolyte ◽

Mesoporous Carbons ◽

Ion Diffusion ◽

Ordered Mesoporous Carbons ◽

Templating Method ◽

Capacitive Performance ◽

Ionic Liquid Electrolyte ◽

Ordered Mesoporous ◽

Surface Chemical Property

Ordered mesoporous carbons (BOMC) were prepared by doping boric acid using a hard-templating method, while a CMK-3 carbon (OMC) was also prepared for comparison. The capacitive performance of these two carbons was investigated in ionic liquid of EMImBF4 and EMImTSFI. As demonstrated by the structure analysis, BOMC possesses almost same surface area and pore size as OMC, while the former carbon possesses higher content of oxygen-containing groups. In ionic liquid electrolyte, the carbons mainly show typical electric double layer capacitance, and the capacitance retention ratio and ion diffusion of electrolyte is determined to the surface chemical property. BOMC present visible pseudo-capacitance due to the oxygenated groups in hydrophilic EMImBF4, while no visible pseudo-capacitive behavior was observed in hydrophobic EMImTSFI.

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