Multi-scale dispersion in fuel cell anode catalysts: Role of TiO2 towards achieving nanostructured materials

Chen, Jiun-Ming; Sarma, Loka Subramanyam; Chen, Ching‐Hsiang; Cheng, Ming‐Yao; Shih, Shou-Chu; Wang, Guo‐Rung; Liu, Din‐Goa; Lee, Jyh‐Fu; Tang, Mau‐Tsu; Hwang, Bing‐Joe

doi:10.1016/j.jpowsour.2006.04.135

Cited by 56 publications

(22 citation statements)

References 16 publications

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“…(2) Adsorption of OH species (OH ad ) on TiO 2 can facilitate the conversion of the catalytically poisonous CO intermediates into CO 2 , thereby improving the durability of Pt catalysts [22,23]. Additionally, TiO 2 can facilitate the dispersion of noble metal nanoparticles and anchor the nanoparticles [24].…”

Section: Introductionmentioning

confidence: 99%

The influence of the crystal structure of TiO2 support material on Pd catalysts for formic acid electrooxidation

Wang

Xia

2010

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

The influence of the crystal structure of TiO2 support material on Pd catalysts for formic acid electrooxidation

Wang

Xia

2010

Electrochimica Acta

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“…Pt/TiO 2 electrodes reported in the papers were prepared by gas phase decomposition, electro-deposition, thermal decomposition [31] and magnetron sputtering [34][35][36][37][38][39][40][41], etc. Different preparation techniques result in different properties of the electrode materials [42].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Pt/TiO 2 nanofibers catalysts for methanol electro-oxidation

Zheng

Chen

Dai

et al. 2015

Electrochimica Acta

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“…However, this system is intrinsically limited because carbon corrosion is a wellrecognized problem during long-term operation or cell reversal in the case of reactant storage [12][13][14][15]. TiO 2 is potentially useful as a support for the deposition of Pt in the direct oxidation of methanol [16,17]. The TiO 2 support can decrease the adsorption energy of CO intermediates and convert the poisonous CO intermediates into CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Properties of TiO2-Embedded Pt Nanoparticles in Oxidation of Methanol: Particle Size Effect and Proton Spillover Effect

et al. 2011

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Size-controlled Pt nanoparticles embedded in TiO 2 were prepared by simultaneous dual-gun sputtering from pure targets of Pt and TiO 2 . The mean diameter of the Pt nanoparticles, as confirmed by their transmission electron microscopic images, was varied from ∼2 to ∼4 nm by changing the RF power ratio of Pt and TiO 2 . The transmission electron diffraction and X-ray diffraction patterns of the Pt nanoparticles embedded in TiO 2 confirmed that the Pt particles are polycrystalline, whereas the TiO 2 matrix is amorphous. The electrocatalytic properties of Pt/TiO 2 were strongly influenced by the particle size and the TiO 2 support. The presence of the TiO 2 support led to higher electronic density on Pt, changing its chemisorption properties, weakening the Pt-CO bonds, and increasing its CO oxidation activity. The high CO oxidation activity of the Pt nanoparticles embedded in TiO 2 can be also attributed to the ability of TiO 2 to provide highly reactive oxygen atoms. CO desorbed at higher onset potential with a decrease in the particle size, which is related to quantumsize effects in the Pt nanoparticles. The high activity of methanol oxidation on the Pt/TiO 2 electrode resulted from the homogeneous dispersion and the miniaturization of Pt. In addition, we found that the enhanced catalytic activity in the Pt/TiO 2 electrodes correlated to proton spillover phenomena in TiO 2 and was measured by performing an in situ electrochromic test.

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Multi-scale dispersion in fuel cell anode catalysts: Role of TiO2 towards achieving nanostructured materials

Cited by 56 publications

References 16 publications

The influence of the crystal structure of TiO2 support material on Pd catalysts for formic acid electrooxidation

The influence of the crystal structure of TiO2 support material on Pd catalysts for formic acid electrooxidation

Preparation and characterization of Pt/TiO 2 nanofibers catalysts for methanol electro-oxidation

Electrocatalytic Properties of TiO2-Embedded Pt Nanoparticles in Oxidation of Methanol: Particle Size Effect and Proton Spillover Effect

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