最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級檢索
預(yù)置活性物前驅(qū)體脈沖電沉積制備DMFC電極
DOI:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項(xiàng)目:

國家自然科學(xué)基金資助項(xiàng)目（20676088）


Preparation of Electrodes for Direct Methanol Fuel Cell by Pulse Electro-Deposition of Pregnant Active Precursors in Porous Carbon Layer
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    預(yù)先將活性物前驅(qū)體置于碳黑層的Nafion微粒體內(nèi)，利用脈沖電沉積法，使Pt或Pt合金優(yōu)先沉積于Nafion與碳黑的接合部，以提高催化劑層貴金屬的有效率。實(shí)驗(yàn)采用循環(huán)伏安法（CV）測定電極電催化活性，用XRD、EDS、TEM技術(shù)表征催化劑微觀結(jié)構(gòu)及金屬微粒的元素組成。結(jié)果表明，toff/ton =3:1，wPtRu/wC=40%，Pt、Ru原子比為1:1，金屬微粒的比表面積為92 m2·g-1、粒徑為3.2 nm，甲醇峰電流密度達(dá)到82 mA·cm-2，活性物的有效率達(dá)到79.1%。

    Abstract:

    A new method of directly charging active metal nano-particles was developed so as to be used to improve the efficiency of depositing precious metals in catalytic layer. The precursors of active material were impregnated in porous carbon black layer in advance, and Pt or Pt alloy were firstly deposited on the surfaces of carbon black nearby Nafion particles by the pulse electro-deposition method. The performances of the electrodes were characterized by CV, and the structure and composition of deposited nano-particles by XRD, TEM and EDS. The optimum condition of the preparing process is toff /ton=300:100, wPtRu/wC=40% (mass fraction), nPt:nRu=1:1 (atom ratio). The specific surface is 92 m2/g, particle size 3.2 nm. Methanol peak value of current density reaches 82 mA·cm-2. The efficiency of Pt-M in porous catalytic layers is much higher than that of thin film electrode method, reaching about 79.1%.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

劉世斌,孫彥平,牛忠義,張忠林,郝曉剛,王秀光.預(yù)置活性物前驅(qū)體脈沖電沉積制備DMFC電極[J].稀有金屬材料與工程,2009,38(6):1066~1070.[Liu Shibin, Sun Yanping, Niu Zhongyi, Zhang Zhonglin, Hao Xiaogang, Wang Xiuguang. Preparation of Electrodes for Direct Methanol Fuel Cell by Pulse Electro-Deposition of Pregnant Active Precursors in Porous Carbon Layer[J]. Rare Metal Materials and Engineering,2009,38(6):1066~1070.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2009-03-05
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: