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Author:

Li, Hongyi (Li, Hongyi.) (Scholars:李洪义) | Liu, Shaojing (Liu, Shaojing.) | Wang, Xinxin (Wang, Xinxin.) | Zu, Guannan (Zu, Guannan.) | Li, Dandan (Li, Dandan.) | Wang, Jinshu (Wang, Jinshu.) (Scholars:王金淑) | Zhao, Jianling (Zhao, Jianling.)

Indexed by:

Scopus SCIE

Abstract:

To better platinum's (Pt's) electro-catalytic activity for oxidizing methanol, nano-flowers structured Pt catalysts with controlled facet had been planted onto titanium dioxide nanotube array (TNA) bed via a pulse electrodeposting method in an add electrolyte containing chloroplatinic acid (H2PtCl6). The facet of Pt nano-flowers can be tuned as (111) or (100) by adding sulfuric add (H2SO4) or hydrochloric acid (HQ) respectively into the precursor. It has been discovered that the nano-flower structured Pt catalysts with (111) facet generates a current density peak of 243.16 rnA.mg(-1) (similar to 2 times that of Pt catalysts with (200) facets) for catalytic oxidizing methanol in electrolyte containing 1 M methanol and 0.5 M H2SO4. In addition, the concentration of sulfuric acid in electrolyte has an effect on electrode's morphology, its electro-catalytic capability and stability. The mechanism of sulfuric acid anion for bettering Pt's electro-catalytic activity had been comparatively investigated by replacing H2SO4 as HCl in precursor. (C) 2019 Elsevier B.V. All rights reserved.

Keyword:

Direct methanol fuel cells Titanium dioxide nanotube arrays Platinum nano-flowers Pulse electro-deposition

Author Community:

  • [ 1 ] [Li, Hongyi]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 2 ] [Liu, Shaojing]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 3 ] [Wang, Xinxin]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 4 ] [Zu, Guannan]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 5 ] [Li, Dandan]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 6 ] [Wang, Jinshu]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 7 ] [Zhao, Jianling]Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China

Reprint Author's Address:

  • 李洪义

    [Li, Hongyi]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China

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Source :

SUSTAINABLE MATERIALS AND TECHNOLOGIES

ISSN: 2214-9937

Year: 2019

Volume: 20

9 . 6 0 0

JCR@2022

JCR Journal Grade:2

Cited Count:

WoS CC Cited Count: 19

SCOPUS Cited Count: 19

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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