| 查看: 682 | 回复: 1 | |||
| 当前主题已经存档。 | |||
可可西里木虫之王 (文学泰斗)
甾体者说
|
[交流]
在来一篇 均相光催化剂
|
||
|
J. Phys. Chem. B, 110 (47), 24047 -24053, 2006. 10.1021/jp065215v S1520-6106(06)05215-1 Web Release Date: November 9, 2006 Copyright © 2006 American Chemical Society Viologen-Modified Platinum Clusters Acting as an Efficient Catalyst in Photocatalytic Hydrogen Evolution Hiroaki Kotani, Kei Ohkubo, Yoshizo Takai, and Shunichi Fukuzumi* Department of Material and Life Science, Graduate School of Engineering, Osaka University, SORST, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan Received: August 12, 2006 In Final Form: September 20, 2006 Abstract: A highly efficient photocatalytic system for hydrogen evolution with dihydronicotinamide coenzyme (NADH) as a sacrificial agent in an aqueous solution has been constructed by using water-soluble platinum clusters functionalized with methyl viologen-alkanethiol (MVA2+) and a simple electron-donor dyad, 9-mesityl-10-methylacridinium ion (Acr+-Mes), which is capable of fast photoinduced electron transfer but extremely slow back electron transfer. The mean diameter of the platinum core was determined as RCORE = 1.9 nm with a standard deviation = 0.5 nm by transmission electron microscopy (TEM). As a result, the hydrogen-evolution rate of the photocatalytic system with MVA2+-modified platinum clusters (MVA2+-PtC) is 10 times faster than the photocatalytic system with the mixture of the same amount of MVA2+ and platinum clusters as that of MVA2+-PtC under otherwise the same experimental conditions. The radical cation of NADH has been successfully detected by laser flash photolysis experiments. The decay of the absorbance due to NAD, produced by the deprotonation from NADH+, coincides with the appearance of the absorption band due to Acr-Mes. This indicates electron transfer from NAD to Acr+-Mes to give Acr-Mes, which undergoes the electron-transfer reduction of MVA2+-PtC, leading to the efficient hydrogen evolution. [ Last edited by daiqiguang on 2007-5-8 at 12:20 ] |
回复此楼» 猜你喜欢
关于合成MIL-125的求助
已经有0人回复
-
双非本硕光催化方向想读博，请各位老师看看我！
已经有2人回复
-
化学工程及工业化学论文润色/翻译怎么收费?
已经有250人回复
-
瑞典林雪平大学范立洲课题组现招聘博士后、岗位制博士生
已经有0人回复
-
中国科大仿生界面材料科学全国重点实验室戴懿涛研究员/江雷院士团队招聘科研助理
已经有0人回复
-
中国科大仿生界面材料科学全国重点实验室戴懿涛研究员/江雷院士团队招聘科研助理
已经有0人回复
-
寻求物理化学学报最新的投稿模板！
已经有4人回复
-
东南大学杰青/海优团队招聘催化方向博士后
已经有866人回复
-
投稿咨询
已经有7人回复
-
自科面上 散金币 祈福
已经有61人回复
-
铁钼催化剂成型
已经有2人回复
sedulity2005
银虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 448.8
- 帖子: 133
- 在线: 10.2小时
- 虫号: 131789
- 注册: 2005-12-12
- 专业: 其他无机非金属材料
2楼2007-05-01 03:00:28
20