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無機(jī)材料鐵桿木蟲 (正式寫手)
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【分享】廉價(jià)高效水分解催化劑問世 已有15人參與
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美國麻省理工學(xué)院(MIT)日前研發(fā)出廉價(jià)、可普及利用的材料配方,可以利用電力有效分解水分子。 此前,MIT已研發(fā)出由鈷和磷制備的同類催化劑,可在常溫常壓下應(yīng)用。他們的最新發(fā)現(xiàn)使用了硼酸鎳配方,也可高效而可持續(xù)地作為產(chǎn)生氧氣的電極,用于水的分解。用作新催化劑的材料來源比此前更為豐富和廉價(jià) |
電池 | 刺客 |
鐵桿木蟲 (知名作家)
男怕優(yōu)柔寡斷,女怕矯揉做作
木蟲 (小有名氣)
至尊木蟲 (正式寫手)
銀蟲 (小有名氣)
銅蟲 (初入文壇)
捐助貴賓 (正式寫手)
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http://www.sciencemag.org/cgi/co ... /342#related-cotent 前幾天看這個(gè)來的 [ Last edited by scpzfeng on 2010-6-1 at 17:06 ] |
鐵桿木蟲 (著名寫手)
榮譽(yù)版主 (文壇精英)
Excellent
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Science 16 April 2010 DOI: 10.1126/science.1185372 A Fast Soluble Carbon-Free Molecular Water Oxidation Catalyst Based on Abundant Metals Qiushi Yin, Jeffrey Miles Tan, Claire Besson, Yurii V. Geletii, Djamaladdin G. Musaev, Aleksey E. Kuznetsov, Zhen Luo, Ken I. Hardcastle, Craig L. Hill Traditional homogeneous water oxidation catalysts are plagued by instability under the reaction conditions. We report that the complex [Co4(H2O)2(PW9O34)2]10–, comprising a Co4O4 core stabilized by oxidatively resistant polytungstate ligands, is a hydrolytically and oxidatively stable homogeneous water oxidation catalyst that self-assembles in water from salts of earth-abundant elements (Co, W, and P). With [Ru(bpy)3]3+ (bpy is 2,2'-bipyridine) as the oxidant, we observe catalytic turnover frequencies for O2 production 5 s–1 at pH = 8. The rate’s pH sensitivity reflects the pH dependence of the four-electron O2-H2O couple. Extensive spectroscopic, electrochemical, and inhibition studies firmly indicate that [Co4(H2O)2(PW9O34)2]10– is stable under catalytic turnover conditions: Neither hydrated cobalt ions nor cobalt hydroxide/oxide particles form in situ. |
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