 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 1/1 | 返回列表 |
| 查看: 1260 | 回復: 4 | |||
| 當前只顯示滿足指定條件的回帖，點擊這里查看本話題的所有回帖 | |||
junkpengli銅蟲 (小有名氣)
|
[交流]
Nature Materials和Nano Lett最新關于PEM fuel cell ORR的intermetallic催化劑的文章
|
||
|
Structurally ordered intermetallic platinum–cobalt core–shell nanoparticles with enhanced activity and stability as oxygen reduction electrocatalysts Deli Wang*, Huolin L. Xin*, Robert Hovden, Hongsen Wang, Yingchao Yu, David A. Muller, Francis J. DiSalvo & Héctor D. Abruña Published online: 28 October 2012 | doi:10.1038/nmat3458 Enhancing and optimizing the performance and durability of nanocatalysts for the oxygen reduction reaction is crucial for fuel-cell applications. A class of Pt–Co nanocatalysts consisting of ordered Pt3Co intermetallic cores with a 2–3 atomic-layer-thick platinum shell now exhibit a large increase in mass activity and specific activity when compared with disordered alloy nanoparticles. Tuning Oxygen Reduction Reaction Activity via Controllable Dealloying: A Model Study of Ordered Cu3Pt/C Intermetallic Nanocatalysts http://pubs.acs.org/doi/abs/10.1021/nl302404g A promising electrocatalyst prototype of low Pt mole fraction, intermetallic nanoparticles of Cu3Pt, has been prepared using a simple impregnation-reduction method, followed by a post heat-treatment. Two dealloying methods (electrochemical and chemical) were implemented to control the atomic-level morphology and improve performance for the oxygen reduction reaction (ORR). The morphology and elemental composition of the dealloyed nanoparticles were characterized at angstrom resolution using an aberration-corrected scanning transmission electron microscope equipped with an electron energy loss spectrometer. We found that the electrochemical dealloying method led to the formation of a thin Pt skin of ca. 1 nm in thickness with an ordered Cu3Pt core structure, while chemical leaching gave rise to a “spongy” structure with no ordered structure being preserved. A three-dimensional tomographic reconstruction indicated that numerous voids were formed in the chemically dealloyed nanoparticles. Both dealloying methods yielded enhanced specific and mass activities toward the ORR and higher stability relative to Pt/C. The spongy nanoparticles exhibited better mass activity with a slightly lower specific activity than the electrochemically dealloyed nanoparticles after 50 potential cycles. In both cases, the mass activity was still enhanced after 5000 potential cycles. 另附幾篇重要的JACS, Nano Letters相關的文章 |
回復此樓» 本帖附件資源列表
-
歡迎監(jiān)督和反饋：小木蟲僅提供交流平臺，不對該內容負責。
本內容由用戶自主發(fā)布，如果其內容涉及到知識產(chǎn)權問題，其責任在于用戶本人，如對版權有異議，請聯(lián)系郵箱：xiaomuchong@tal.com - 附件 1 : FuelcellORRbimetallicnanocatalysts.zip
2012-10-29 14:51:22, 5.35 M
» 猜你喜歡
溫州大學王娟課題組2026年招生
已經(jīng)有10人回復
-
溫州大學2026年招生（化學、材料）
已經(jīng)有10人回復
-
金屬材料論文潤色/翻譯怎么收費?
已經(jīng)有128人回復
-
招生負責_院士團隊_學生高自由度成長_擅長學生培養(yǎng)
已經(jīng)有5人回復
-
溫州大學招收2026年入學博士研究生（化學、材料、環(huán)境）
已經(jīng)有10人回復
-
非晶合金
已經(jīng)有2人回復
-
院士團隊-每屆學生都優(yōu)秀-高自由度-團隊氛圍好
已經(jīng)有0人回復
-
求調劑
已經(jīng)有2人回復
-
化工學院（學院正式調劑群+聯(lián)系方式）
已經(jīng)有0人回復
-
化工學院（學院官方群）-院士團隊招生-學生自由度高-培養(yǎng)模式成熟高效
已經(jīng)有0人回復
» 本主題相關價值貼推薦，對您同樣有幫助:
- nature Asia Mat 最近評論: 金屬玻璃
已經(jīng)有63人回復
- nature Asia Mat 評論: 鐵電材料
已經(jīng)有210人回復
- nature Asia Mat 最新評論:氧化物生物傳感器
已經(jīng)有40人回復
- nature Asia Mat 最新評論：液晶顯示器
已經(jīng)有50人回復
- 幫別人再求一篇Nature Mat 文章
已經(jīng)有1人回復
0.8
| 頂一下，感謝分享！ |
3樓2012-10-29 18:58:46
0.8
| 頂一下，感謝分享！ |
2樓2012-10-29 18:49:02
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 329求調劑 +9 | 想上學吖吖 2026-03-19 | 9/450 |
|
|---|---|---|---|---|
|
|
[考研] 0817 化學工程 299分求調劑 有科研經(jīng)歷 有二區(qū)文章 +22 | rare12345 2026-03-18 | 22/1100 |
|
|
[考研] 材料學求調劑 +4 | Stella_Yao 2026-03-20 | 4/200 |
|
|
|
[考研] 一志愿西安交通大學 學碩 354求調劑 +3 | 我想要讀研究生 2026-03-20 | 3/150 |
|
|
|
[考研] 319求調劑 +3 | 小力氣珂珂 2026-03-20 | 3/150 |
|
|
|
[考研] 299求調劑 +3 | shxchem 2026-03-20 | 4/200 |
|
|
|
[考研] 環(huán)境工程調劑 +9 | 大可digkids 2026-03-16 | 9/450 |
|
|
|
[考研] 08工學調劑 +5 | 用戶573181 2026-03-20 | 5/250 |
|
|
|
[考研] 能源材料化學課題組招收碩士研究生8-10名 +5 | 脫穎而出 2026-03-16 | 14/700 |
|
|
|
[考研] 0703化學調劑 +10 | 妮妮ninicgb 2026-03-15 | 14/700 |
|
|
|
[考研] 一志愿南京理工大學085701資源與環(huán)境302分求調劑 +3 | 葵梓衛(wèi)隊 2026-03-18 | 5/250 |
|
|
|
[考研] 085600材料與化工調劑 324分 +10 | llllkkkhh 2026-03-18 | 12/600 |
|
|
|
[考研] 0703化學調劑，求各位老師收留 +10 | 秋有木北 2026-03-14 | 10/500 |
|
|
|
[考研] 生物學071000 329分求調劑 +3 | 我愛生物生物愛?/a> 2026-03-17 | 3/150 |
|
|
|
[考研] 0703化學336分求調劑 +6 | zbzihdhd 2026-03-15 | 7/350 |
|
|
|
[考研] 277調劑 +5 | 自由煎餅果子 2026-03-16 | 6/300 |
|
|
|
[考研] 268求調劑 +8 | 一定有學上- 2026-03-14 | 9/450 |
|
|
|
[考研] 一志愿，福州大學材料專碩339分求調劑 +3 | 木子momo青爭 2026-03-15 | 3/150 |
|
|
|
[考研] 304求調劑 +5 | 素年祭語 2026-03-15 | 5/250 |
|
|
|
[考研] 本科南京大學一志愿川大藥學327 +3 | 麥田耕者 2026-03-14 | 3/150 |
|