24小时热门版块排行榜

返回列表

【奖励】本帖被评价1次，作者happyboy2008增加金币 1 个

当前主题已经存档。

happyboy2008

至尊木虫 (知名作家)

应助: 0 (幼儿园)
金币: 10995.2
帖子: 5368
在线: 970.8小时
虫号: 290510

[资源] 2007年Nature materials 上关于PEMFC催化剂的文章

title:Trends in electrocatalysis on extended and nanoscale Pt-bimetallic alloy surfaces

abstract:One of the key objectives in fuel-cell technology is to improve and reduce Pt loading as the oxygen-reduction catalyst.Here, we show a fundamental relationship in electrocatalytic trends on Pt3M (M=Ni, Co, Fe, Ti, V) surfaces between the experimentally determined surface electronic structure (the d-band centre) and activity for the oxygen-reduction reaction. This relationship exhibits ‘volcanotype’ behaviour, where the maximum catalytic activity is governed by a balance between adsorption energies of reactive intermediates and surface coverage by spectator (blocking) species. The electrocatalytic trends established for extended surfaces are used to explain the activity pattern of Pt3Mnanocatalysts as well as to provide a fundamental basis for the catalytic enhancement of cathode catalysts.
By combining simulations with experiments in the quest for surfaces with desired activity, an advanced concept in nanoscale catalyst engineering has been developed
我上传到公共邮箱了，地址是
http://www.box.net/shared/d3z068pasm
第一次上传大文件，格式可能不对，麻烦版主帮忙改一改。谢谢大家的支持！

回复此楼

» 猜你喜欢

1楼 2007-12-06 10:10:39

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

happyboy2008

至尊木虫 (知名作家)

应助: 0 (幼儿园)
金币: 10995.2
帖子: 5368
在线: 970.8小时
虫号: 290510

本人也是刚刚接触燃料电池，评价的不当之处，还请各位指正。我觉得本文最大的可取之处是把现有的理论（d带中心理论）和实验的结果结合了起来，通过高真空实验所得到的数据，特别是催化剂的表面电子结构数据，把催化性能和催化剂的表面电子结构（d带中心）联系起来，用d带中心理论解释了为什么会有更好的催化性能。为催化剂的选择提供了理论依据。使催化剂的选择制备不在盲目，不过该理论还需要进一步的完善，更需要实际的实验数据来验证。