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wangluhui

金虫 (正式写手)

[交流] 【分享】Maria Flytzani-Stephanopoulos的science新作(water gas shift)已有9人参与

又science了,这回稀土也不用了
DOI: 10.1126/science.1192449
Science 329, 1633 (2010);
Yanping Zhai, et al.
Alkali-Stabilized Pt-OHx Species Catalyze Low-Temperature Water-Gas Shift Reactions
We report that alkali ions (sodium or potassium) added in small amounts activate platinum adsorbed on alumina or silica for the low-temperature water-gas shift (WGS) reaction (H2O + CO → H2 + CO2) used for producing H2. The alkali ion–associated surface OH groups are activated by CO at low temperatures (~100°C) in the presence of atomically dispersed platinum. Both experimental evidence and density functional theory calculations suggest that a partially oxidized Pt-alkali-Ox(OH)y species is the active site for the low-temperature Pt-catalyzed WGS reaction. These findings are useful for the design of highly active and stable WGS catalysts that contain only trace amounts of a precious metal without the need for a reducible oxide support such as ceria.


http://good.gd/765694.htm



[ Last edited by wangluhui on 2010-10-16 at 10:27 ]
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Quan.

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小木虫(金币+0.5):给个红包,谢谢回帖交流
不错!谢谢分享!!!!!!!!!!!
6楼2010-10-16 06:34:20
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小木虫(金币+0.5):给个红包,谢谢回帖交流
谢谢分享
3楼2010-10-15 20:33:04
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jinkai838

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小木虫(金币+0.5):给个红包,谢谢回帖交流
,希望把期刊号写一下
斜杠青年
5楼2010-10-16 01:25:25
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graham1101

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小木虫(金币+0.5):给个红包,谢谢回帖交流
强悍!仔细拜读!
7楼2010-10-18 17:28:32
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