4.7 Article

Synthesis of Pt nanoparticles supported on a novel 2D bismuth tungstate/lanthanum titanate heterojunction for photoelectrocatalytic oxidation of methanol

期刊

JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 561, 期 -, 页码 338-347

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.10.114

关键词

Bismuth tungstate; La2Ti2O7; Photoelectrocatalyst; Methanol oxidation; Fuel cell reaction

资金

  1. National Natural Science Foundation of China [51702173]
  2. K.C. Wong Magna Fund in Ningbo University, China
  3. Open Project Program of the State Key Laboratory of Photocatalysis on Energy and Environment [SKLPEE-KF201808]
  4. Fuzhou University, China

向作者/读者索取更多资源

The combination of different semiconductors to form a heterojunction plays an important role for exploring new visible-light-driven electrocatalysts. Herein, a two-dimensional (2D) Bi2WO6/La-2 Ti2O7 (LTO) heterojunction has been synthesized and to be as carrier of Pt nanoparticles. Subsequently, electrocatalytic activity and stability of the as-obtained Pt-Bi2WO6/LTO has been evaluated in methanol oxidation reaction (MOR) under the action of visible light and electricity. Results indicate that Pt-Bi2WO6/LTO sample displays excellent catalytic performance and stability with assistance from visible light. Under identical conditions, the current intensity of MOR on the Pt-Bi2WO6/LTO modified electrode is found to reach 1409 mA mgF(pt)(-1) , which is 3.92 times higher than the measured Pt-Bi2WO6 modified electrode (359.8 mA mgFpt(-1) ). In addition, the current density of MOR on Pt-Bi2WO6/LTO electrode decreases by 2.85% after scanning for 300 cycles. Furthermore, Pt-Bi2WO6/LTO is 6.99 times more resistant to poisoning than the Pt-Bi2WO6 electrode determines by chronopotentiometry under visible light illumination. The presented results indicate that a Pt-Bi2WO6/LTO nanocomposite is a viable alternative photo-electric catalyst, providing a potential new basis for the future development of catalysts in fuel cell reactions. (C) 2019 Elsevier Inc. All rights reserved.

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