24小时热门版块排行榜    

查看: 1995  |  回复: 8
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

polyoxometalate

银虫 (著名写手)


[交流] 请问已报道的光催化产氢最多是多少?10 mmol per hour per gram of photocatalysts

请问已报道的光催化产氢最多是多少?有比10 mmol per hour per gram of photocatalysts更多的报道吗?

[ Last edited by pzypdl on 2013-2-19 at 22:24 ]
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   关注TA 给TA发消息 送TA红花 TA的回帖

polyoxometalate

银虫 (著名写手)


We also measured photocatalytic H2 production using black TiO2 as the photocatalyst with only visible and infrared light by filtering out incident light with wavelengths shorter than about 400 nm. The rate of H2 production dropped to 0.1 mmol +/- 0.02 per hour per gram of photocatalysts, reflecting the activity of the extended tail or mid-gap states of the thin disordered layer that have a narrower band gap created by disordering.
8楼2013-02-05 14:25:58
已阅   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 9 个回答

yanhj0

铁杆木虫 (知名作家)


★ ★
小木虫: 金币+0.5, 给个红包,谢谢回帖
pzypdl: 金币+1, 谢谢回帖交流! 2013-02-01 19:56:37
绝对产氢量是不可比的. 因为不同的实验所用的光源, 催化剂用量等不一定相同,所以没有可比性. 一般比较的是在某一波长下的量子效率.
2楼2013-02-01 19:46:07
已阅   关注TA 给TA发消息 送TA红花 TA的回帖

doctorzyjunior

铜虫 (小有名气)


★ ★
小木虫: 金币+0.5, 给个红包,谢谢回帖
cxqtitan: 金币+1, 谢谢分享 2013-02-03 13:12:31
Ref: Chem. Mater. 2008, 20, 35-54
Current record holders in therms of quantum efficiencies (QEs) are NiO-modified La/KTaO3 (QE = 56%, pure water, UV light), ZnS (QE = 90%, aqueous Na2S/Na2SO3, light with λ> 300 nm), and Cr/Rh-modified GaN/ZnO (QE = 2.5%, pure water, visible light).
用QE做参考,比较起来才(目前公认 Angew. Chem. Int. Ed. 2010, 49, 1536-1539)有意义。所以,你所谓的“产氢”数量是一个不具有实际意义的数值。归一化很重要。就好比你单单讨论“TON”的多少,远不如“TOF”来得有可比较性。
3楼2013-02-03 04:49:08
已阅   关注TA 给TA发消息 送TA红花 TA的回帖

liuyinallen

银虫 (小有名气)


★ ★
小木虫: 金币+0.5, 给个红包,谢谢回帖
cxqtitan: 金币+1, 谢谢分享 2013-02-05 08:05:48
Agreed with "doctorzyjunior" said.
FYI, please check some references from Dr. Kudo's group, Dr. Domen's group and Dr. H. Teng's group (from National Cheng Kung University, Taiwan). I did some water splitting exp. using optimized Kudo's catalyst (NiO-NaTaO3:La). The max H2 evolution rate I observed is  ~10mmol/hr.gcat (pure water, low pressure UV lamp  90% ouput at 254 nm).
4楼2013-02-05 04:42:05
已阅   关注TA 给TA发消息 送TA红花 TA的回帖
信息提示
请填处理意见