| 查看: 7838 | 回复: 213 | |||||||||||||||||||||||||||
| 【奖励】 本帖被评价188次，作者xiejf增加金币 148.4 个 | |||||||||||||||||||||||||||
| 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 | |||||||||||||||||||||||||||
xiejf专家顾问 (文学泰斗)
|
[资源]
Science最新研究进展：光化学法制备非晶金属氧化物用作高效水氧化分解催化剂
|
||||||||||||||||||||||||||
|
最新一期的Science刊发了加拿大卡尔加里大学科学家的研究成果，通过简便的光化学制备途径得到了具有高效水分解催化活性的非晶金属氧化物。 Large-scale electrolysis of water for hydrogen generation requires better catalysts to lower the kinetic barriers associated with the oxygen evolution reaction (OER). Although most OER catalysts are based on crystalline mixed-metal oxides, high activities can also be achieved with amorphous phases. Methods for producing amorphous materials, however, are not typically amenable to mixed-metal compositions. We demonstrate that a low-temperature process, photochemical metal-organic deposition, can produce amorphous (mixed) metal oxide films for OER catalysis. The films contain a homogeneous distribution of metals with compositions that can be accurately controlled. The catalytic properties of amorphous iron oxide prepared with this technique are superior to those of hematite, whereas the catalytic properties of a-Fe100-y-zCoyNizOx are comparable to those of noble metal oxide catalysts currently used in commercial electrolyzers. Amorphous and More Active The electrochemical generation of hydrogen from water could help in the storage of energy generated by renewable resources at off-peak times. However, catalysts for the slow step of this reaction, the oxygen evolution reaction (OER), are based on oxides of noble metals (iridium and ruthenium) that have limited abundance. A strategy for improving the performance of earth-abundant elements is to explore mixed-metal oxides and to prepare these as amorphous phases. Smith et al. (p. 60, published online 28 March) developed a general method for preparing amorphous oxides, based on photodecomposition of organometallic precursors. Amorphous mixed-metal oxides of iron, nickel, and cobalt were more active than comparable crystalline materials and provided OER performance comparable to noble metal oxides. /  F3_large.jpg [ 来自科研家族 材料家族 ] |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : PhotochemicalRouteforAccessingAmorphousMetalOxideMaterialsforWaterOxidationCatalysis-S.pdf
- 附件 2 : PhotochemicalRouteforAccessingAmorphousMetalOxideMaterialsforWaterOxidationCatalysis.pdf
2013-04-05 10:50:50, 1.06 M
2013-04-05 10:50:52, 1.44 M
» 收录本帖的淘帖专辑推荐
 先进材料 | 资源收集 | 万卷阁之搜神记 | 科研资料 |
| NATURE 和 SCIENCE | 纳米化学/电化学综述 | 材料综述 | 光催化专辑 |
| 环境能源科学 | 光催化&好帖 | 纳米材料 | 小木虫环境治理 |
| Nature系列 | 文献 | 小木虫上有用知识专辑 | uicorn3 |
| 生活休闲 | Photochemistry | Book & Review | 文章 |
| 专业 | nanomaterials | 精彩贴，精华帖~~~ |
» 猜你喜欢
金属材料论文润色/翻译怎么收费?
已经有188人回复
» 本主题相关商家推荐: (我也要在这里推广)
» 本主题相关价值贴推荐，对您同样有帮助:
9楼2013-04-05 12:54:59
简单回复
ngwang3楼
2013-04-05 11:43
回复
五星好评 顶一下，感谢分享！
ngwang4楼
2013-04-05 11:43
回复
顶一下，感谢分享！
2013-04-05 11:59
回复
五星好评 顶一下，感谢分享！
2013-04-05 12:00
回复
顶一下，感谢分享！
2013-04-05 12:27
回复
五星好评 顶一下，感谢分享！
林紫8楼
2013-04-05 12:35
回复
五星好评 顶一下，感谢分享！
L2TO10楼
2013-04-05 13:22
回复
五星好评 顶一下，感谢分享！
瞬～11楼
2013-04-05 13:43
回复
五星好评 顶一下，感谢分享！
yifeixian12楼
2013-04-05 13:58
回复
五星好评 顶一下，感谢分享！
hanyu1310513楼
2013-04-05 14:30
回复
五星好评 顶一下，感谢分享！
hanyu1310514楼
2013-04-05 14:31
回复
顶一下，感谢分享！
20