Facile synthesis of Pt nanoparticles supported on anatase TiO<sub>2</sub> nanotubes with good photo-electrocatalysis performance for methanol

Zhang, Jianbo; Su, Nan; Hu, Xiulan; Zhu, Fuliang; Yu, Yan; Ye, Hui

doi:10.1039/c7ra11564d

Cited by 13 publications

(4 citation statements)

References 63 publications

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“…The calculated initial ECSA of Pt/MPTO samples is relatively low than Pt/C regardless of particle size. It is due to the low electrical conductivity of MPTO and is consistent with the results reported in previous literature [ 13 , 72 , 73 ]. The linear sweep voltammograms (LSVs) on Pt/MPTO and Pt/C, recorded in the anodic sweep mode in an O 2 -saturated 0.1 M HClO 4 solution at 1600 rpm.…”

Section: Resultssupporting

confidence: 92%

Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide

et al. 2021

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In this study, we address the catalytic performance of variously sized Pt nanoparticles (NPs) (from 1.7 to 2.9 nm) supported on magnéli phase titanium oxide (MPTO, Ti4O7) along with commercial solid type carbon (VXC-72R) for oxygen reduction reaction (ORR). Key idea is to utilize a robust and electrically conductive MPTO as a support material so that we employed it to improve the catalytic activity and durability through the strong metal-support interaction (SMSI). Furthermore, we increase the specific surface area of MPTO up to 61.6 m2 g−1 to enhance the SMSI effect between Pt NP and MPTO. After the deposition of a range of Pt NPs on the support materials, we investigate the ORR activity and durability using a rotating disk electrode (RDE) technique in acid media. As a result of accelerated stress test (AST) for 30k cycles, regardless of the Pt particle size, we confirmed that Pt/MPTO samples show a lower electrochemical surface area (ECSA) loss (<20%) than that of Pt/C (~40%). That is explained by the increased dissolution potential and binding energy of Pt on MPTO against to carbon, which is supported by the density functional theory (DFT) calculations. Based on these results, we found that conductive metal oxides could be an alternative as a support material for the long-term fuel cell operation.

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Section: Resultssupporting

confidence: 92%

Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide

et al. 2021

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“…Pt/TiO 2 exhibits high CO oxidation activity and durability in the presence of sulfur because of its low SO 2 adsorption and sulfate formation, ,− and the crystalline phase of TiO 2 (such as rutile, anatase) affects the CO oxidation activity significantly. − Lane and Wolf reported that Pt/rutile exhibits higher catalytic performance for CO oxidation at a lower temperature (T 50 = 101 °C) than Pt/anatase (T 50 = 142 °C) . Numerous studies have been conducted to understand the unique properties of the Pt/TiO 2 catalyst. ,− ,− However, the origin of the higher CO oxidation activity of Pt/rutile than Pt/anatase remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Origin of Higher CO Oxidation Activity of Pt/Rutile than That of Pt/Anatase

Kim

Kwak

2023

J. Phys. Chem. C

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Herein, we show that the weak interaction of CO with Pt/TiO 2 under the CO oxidation condition is the origin of higher CO oxidation activity of Pt/rutile than that of Pt/anatase. The results of CO temperature-programmed desorption (TPD) and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) indicate that the onset temperatures of CO desorption on freshly prepared Pt/rutile and Pt/anatase are the same. However, the CO-TPD curves of Pt/rutile after the reaction test show that the desorption temperature of CO shifts to a lower temperature, while that for Pt/anatase does not change. The in situ pulse reaction using DRIFTS reveals that CO on Pt/rutile reacted with oxygen faster than CO on Pt/anatase. IR spectra with peak deconvolution of adsorbed CO on Pt/rutile exhibit that CO adsorbed on the terrace sites of Pt clusters on rutile (2089 cm −1 ) reacts readily with O 2 . These results indicate that the higher lowtemperature activity of Pt/rutile is related to its weaker interaction with CO compared with Pt/anatase under the reaction conditions. Our findings deepen the fundamental understanding of metal−support interaction and CO oxidation on Pt/TiO 2 catalysts.

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“…To suppress the recombination of photogenerated charges and prolong the lifetime of charges, TiO 2 with various nanostructures such as nanorods, nanotubes, and ordered arrays was synthesized and adopted as the photoresponsive component, which meanwhile acted as the support for dispersing Pt nanoparticles. [11][12][13][14][15] It was reported that 1D TiO 2 nanorods arrays (1D-TiO 2 NRs) of high aspect ratios not only possessed excellent photogenerated charge carrier transport ability with low recombination rate, but also served to anchor the Pt nanoparticls. The Pt-1D TiO 2 NRs electrodes show improved activities toward methanol oxidation reaction (MOR) under light irradiation.…”

Section: Titanium Oxidesmentioning

confidence: 99%

Recent Progress on Photo‐Promoted Alcohol Electrooxidation for Fuel Cells

et al. 2020

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Alcohol electrooxidation reaction (AOR) is of sluggish kinetics, which as the anodic reaction of direct alcohol fuel cells determines largely the discharging performance of the device. Solar energy as an endless energy source is introduced to promote the AOR kinetics. Herein, the recent progress on photopromoted AOR and the application in fuel cells is reviewed, including 1) design of the AOR photoelectrocatalysts, 2) photoelectrocatalysis mechanism, and 3) fabrication of photo-promoted direct alcohol fuel cells (PDAFCs). Finally, a perspective on the challenges of PDAFCs and new directions in this exciting and still emerging research area are given.

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Facile synthesis of Pt nanoparticles supported on anatase TiO₂ nanotubes with good photo-electrocatalysis performance for methanol

Abstract: A Pt/TNTs/C catalyst showed enhanced MOR performance under the light illumination.

Cited by 13 publications

References 63 publications

Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide

Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide

Origin of Higher CO Oxidation Activity of Pt/Rutile than That of Pt/Anatase

Recent Progress on Photo‐Promoted Alcohol Electrooxidation for Fuel Cells

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Facile synthesis of Pt nanoparticles supported on anatase TiO2 nanotubes with good photo-electrocatalysis performance for methanol

Abstract: A Pt/TNTs/C catalyst showed enhanced MOR performance under the light illumination.

Cited by 13 publications

References 63 publications

Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide

Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide

Origin of Higher CO Oxidation Activity of Pt/Rutile than That of Pt/Anatase

Recent Progress on Photo‐Promoted Alcohol Electrooxidation for Fuel Cells

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Facile synthesis of Pt nanoparticles supported on anatase TiO₂ nanotubes with good photo-electrocatalysis performance for methanol