Method for preparing highly dispersed Pt catalysts on mesoporous carbon support

Zeng, Jianhuang; Su, Fabing; Lee, Jim Yang; Xin, Zhao; Chen, Jianjun; Jiang, Xiaohua

doi:10.1007/s10853-007-1571-4

Cited by 23 publications

(11 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…10 The small pore sizes of C15 sucr and C16 sucr thus are likely to have enhanced the dispersion of Pt particles on the carbon supports. 34 In addition, the ordered monodimensional aligned channels, which were typically for OMCs templated from SBA-15, were observed for Pt/C15 sucr and Pt/C15 sucr+B (Figure 5A and B), indicating that the insertion of Pt did not modify the pore structures of C15 sucr and C15 sucr+B . 29 XPS was employed to analyze the surface properties of the catalysts.…”

Section: Resultsmentioning

confidence: 89%

Electrochemical Performance of Pt-Based Catalysts Supported on Different Ordered Mesoporous Carbons (Pt/OMCs) for Oxygen Reduction Reaction

Zeng

Francia

Dumitrescu

et al. 2011

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The present work aims to compare and evaluate the behavior of platinum catalysts supported on different ordered mesoporous carbons (Pt/OMCs). OMCs were templated from two kinds of ordered mesoporous silicas (2-D SBA-15 and 3-D SBA-16), with sucrose as carbon precursor and boric acid as a pore expanding agent. Structural characterizations revealed that all OMCs inherited the structure from silica templates. OMC synthesized from a mixture of sucrose and boric acid exhibited a larger pore size. According to XRD, TEM, and XPS analysis, particle size and distribution of Pt were influenced by the porosity of OMC supports. In single PEMFC tests, catalysts supported on OMC with a 3-D pore structure (Pt/C16sucr: 0.57 W cm–2 at 0.45 V) or with 2-D larger pores (Pt/C15sucr+B: 0.44 W cm–2 at 0.45 V) significantly enhanced the FC performance compared to Pt/C15sucr (0.29 W cm–2 at 0.45 V), which may be attributed to a better mass transfer and a higher catalytic activity. In particular, it was found that Pt/C16sucr had a catalytic behavior superior to that of the Pt/Vulcan commercial catalyst in the high potential region, suggesting that C16sucr is a promising catalyst support for PEMFC application.

show abstract

Section: Resultsmentioning

confidence: 89%

Electrochemical Performance of Pt-Based Catalysts Supported on Different Ordered Mesoporous Carbons (Pt/OMCs) for Oxygen Reduction Reaction

Zeng

Francia

Dumitrescu

et al. 2011

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Pt nanoparticles are typically loaded onto porous carbon via precursor impregnation followed by reduction with either hydrogen (under heat) or borohydrides. [143,[148][149][150][151][152][153][154] The as-synthesized carbon/Pt materials have been studied extensively as oxygen reduction catalysts for directmethanol fuel cells (DMFC). The conventionally adopted support for Pt is activated carbon, which contains mostly micropores.…”

Section: Impregnationmentioning

confidence: 99%

Functionalization of Porous Carbon Materials with Designed Pore Architecture

2009

View full text Add to dashboard Cite

Recent progress in syntheses of porous carbons with designed pore architecture has rejuvenated the field of carbon chemistry and promises to provide new advanced materials. In order to reap the full benefit of designer carbons, it is necessary to develop chemistries for functionalizing the porous carbon surfaces. This Review examines methods of functionalizing porous carbon through direct incorporation of heteroatoms in the carbon synthesis, surface oxidation and activation, halogenation, sulfonation, grafting, attachment of nanoparticles and surface coating with polymers. Methods of characterizing the functionalized carbon materials and applications that benefit from functionalized nanoporous carbons with designed architecture are also highlighted.

show abstract

“…There are efforts for the development of Pt-free electrocatalysts; however, there is no remarkable power density that meets automotive targets [2]. Since the main goal is to lower Pt loading without losing the fuel cell performance [3], several techniques have been evolved such as vacuum deposition, sputtering, supercritical deposition, colloidal deposition, reactive spray deposition and electrodeposition methods to have efficient use of Pt [4][5][6][7][8][9]. In addition to these, electrospraying is a promising technique that leads to electrostatic deposition of the catalyst ink with uniform distribution and efficient utilization of electrocatalyst [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Electrosprayed catalyst layers based on graphene–carbon black hybrids for the next-generation fuel cell electrodes

et al. 2016

View full text Add to dashboard Cite

Here, we report a novel electrode structure with graphene and graphene-carbon black hybrids by electrospraying for polymer electrolyte membrane fuel cells. After syntheses of platinum (Pt)/partially reduced graphene oxide (rGO) and Pt/r-GO/carbon black (CB) hybrid electrocatalysts, suspensions of synthesized electrocatalyst inks were prepared with Nafion Ò ionomer and poly(vinylidene fluoride-cohexafluoropropylene) and electrosprayed over carbon paper to form electrodes. Electrosprayed catalyst layer exhibited uniform and small size Pt distribution. As the graphene content increases micrometer-sized droplet, pore formation and surface roughness of the electrode increase. Thus, an open porous electrode structure which is favorable for mass transport is achieved by electrospraying. The maximum power densities, 324 mW cm -2 for Pt/rGO and 441 mW cm -2 for Pt/rGO/CB electrosprayed electrodes, were achieved at a relatively low catalyst loading.

show abstract

Method for preparing highly dispersed Pt catalysts on mesoporous carbon support

Cited by 23 publications

References 19 publications

Electrochemical Performance of Pt-Based Catalysts Supported on Different Ordered Mesoporous Carbons (Pt/OMCs) for Oxygen Reduction Reaction

Electrochemical Performance of Pt-Based Catalysts Supported on Different Ordered Mesoporous Carbons (Pt/OMCs) for Oxygen Reduction Reaction

Functionalization of Porous Carbon Materials with Designed Pore Architecture

Electrosprayed catalyst layers based on graphene–carbon black hybrids for the next-generation fuel cell electrodes

Contact Info

Product

Resources

About