| 查看: 616 | 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
淮北师范大学 化学与化工科学学院 电催化课题组还有1名硕士研究生招生名额
已经有0人回复
-
英文期刊求助
已经有3人回复
-
专业论文润色/翻译怎么收费?
已经有267人回复
-
化学相关硕士研究生招收调剂-湖北师范大学 （快来捡漏，最新调剂信息，过国家线即可）
已经有1人回复
-
河南理工大学化学化工学院招收学硕调剂生
已经有0人回复
-
黑龙江科技大学化工 环境工程调剂
已经有22人回复
-
莆田学院环境与生物工程学院资源与环境专硕（环境工程方向） 开放调剂招生
已经有13人回复
-
浙江海洋大学石油化工与环境学院招收工科调剂生（学硕、专硕均可，线上面试）
已经有0人回复
-
浙江海洋大学石油化工学院接收工科调剂（学硕、专硕均可，近期线上面试）
已经有8人回复
-
浙江海洋大学石油与天然气工程专业接收工科调剂（13日早上截止，线上面试）
已经有0人回复
-
考研调剂～湖南工程学院材料与化工学院
已经有0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
