| 查看: 1749 | 回复: 8 | ||||||
feiba00木虫 (小有名气)
|
[交流]
最新nature materials 燃料电池非铂氧还原催化剂 已有7人参与
|
|
Identification of catalytic sites for oxygen reduction in iron- and nitrogen-doped graphene materials Andrea Zitolo, Vincent Goellner, Vanessa Armel, Moulay-Tahar Sougrati, Tzonka Mineva, Lorenzo Stievano, Emiliano Fonda & Frédéric Jaouen AffiliationsContributionsCorresponding authors Abstract Abstract• References• Author information• Supplementary information While platinum has hitherto been the element of choice for catalysing oxygen electroreduction in acidic polymer fuel cells, tremendous progress has been reported for pyrolysed Fe–N–C materials. However, the structure of their active sites has remained elusive, delaying further advance. Here, we synthesized Fe–N–C materials quasi-free of crystallographic iron structures after argon or ammonia pyrolysis. These materials exhibit nearly identical Mössbauer spectra and identical X-ray absorption near-edge spectroscopy (XANES) spectra, revealing the same Fe-centred moieties. However, the much higher activity and basicity of NH3-pyrolysed Fe–N–C materials demonstrates that the turnover frequency of Fe-centred moieties depends on the physico-chemical properties of the support. Following a thorough XANES analysis, the detailed structures of two FeN4 porphyrinic architectures with different O2 adsorption modes were then identified. These porphyrinic moieties are not easily integrated in graphene sheets, in contrast with Fe-centred moieties assumed hitherto for pyrolysed Fe–N–C materials. These new insights open the path to bottom-up synthesis approaches and studies on site–support interactions. |
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 : Identification_of_catalytic_sites_for_oxygen_reduction_in_iron-_and_nitrogen-doped_graphene_materials.pdf
- 附件 2 : Identification_of_catalytic_sites_for_oxygen_reduction_in_iron-_and_nitrogen-doped_graphene_materials_SI.pdf
2015-08-14 08:41:00, 891.66 K
2015-08-14 08:42:09, 13.9 M
» 收录本帖的淘帖专辑推荐
 新能源 | 材料合成001淘帖 | 工作相关 |
» 本帖已获得的红花（最新10朵）
jinhuitong» 猜你喜欢
求调剂，本科吉大，一志愿华工339
已经有2人回复
-
意大利博洛尼亚大学招聘研究助理2名（2D材料/锂离子与钠离子电池方向）
已经有1人回复
-
分析化学论文润色/翻译怎么收费?
已经有255人回复
-
关于碳量子点抗菌的研究
已经有15人回复
-
南大化学调剂
已经有11人回复
-
硫酸钠溶液浓度与密度曲线
已经有0人回复
-
0703调剂
已经有2人回复
-
1
已经有14人回复
-
0703 调剂
已经有4人回复
-
招收
已经有0人回复
0.8
| 顶一下，感谢分享！ |
2楼2015-08-14 08:52:24
2006090100
木虫 (正式写手)
Pt@Li@V
- 应助: 2 (幼儿园)
- 金币: 5398.9
- 帖子: 705
- 在线: 354.5小时
- 虫号: 670532
- 注册: 2008-12-08
- 性别: GG
- 专业: 电化学
3楼2015-08-14 11:23:09
jinhuitong
铜虫 (正式写手)
- 应助: 0 (幼儿园)
- 金币: 116
- 红花: 1
- 帖子: 698
- 在线: 102.2小时
- 虫号: 439160
- 注册: 2007-10-08
- 性别: GG
- 专业: 催化化学
4楼2015-08-14 16:02:50
 |
5楼2015-08-14 16:50:46
 |
6楼2015-08-14 19:50:01
7楼2015-08-16 14:11:14
zcz406118whp
木虫 (正式写手)
- 应助: 14 (小学生)
- 金币: 2361.5
- 散金: 298
- 红花: 20
- 帖子: 646
- 在线: 149小时
- 虫号: 2770050
- 注册: 2013-11-01
- 性别: GG
- 专业: 电化学分析
8楼2015-08-26 09:19:08
9楼2015-08-26 15:21:09
