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日本研究團(tuán)隊(duì)將銹與光結(jié)合 使氫氣產(chǎn)量提高25倍  但是，經(jīng)濟(jì)和可持續(xù)的制氫方法尚未真正確定。電解浪費(fèi)大量能量并消耗淡水。天然氣或煤炭生產(chǎn)會(huì)在生產(chǎn)現(xiàn)場(chǎng)釋放大量碳，從而消除了任何可感知的環(huán)境效益。20世紀(jì)70年代發(fā)明的太陽能驅(qū)動(dòng)的光催化過程產(chǎn)生的氫氣很少，因此不值得其二氧化鈦催化劑帶來麻煩或費(fèi)用。 現(xiàn)在，東京理科大學(xué)的一個(gè)研究小組認(rèn)為，它已經(jīng)找到了一種基于特殊類型銹蝕的廉價(jià)、高效光催化制氫的解決方案。  該團(tuán)隊(duì)使用氙氣燈發(fā)出的光，水-甲醇溶液和一種名為α-FeOOH的鐵銹形式的催化劑，發(fā)現(xiàn)產(chǎn)生的氫比以前的二氧化鈦技術(shù)高25倍。另外一個(gè)好處是，這種特殊形式的銹蝕似乎有助于阻止氫氣與容器中的氧氣重新結(jié)合，從而更易于分離并避免潛在的爆炸危險(xiǎn)。該構(gòu)造能持續(xù)穩(wěn)定地產(chǎn)生氫氣超過400小時(shí)。  該小組接下來計(jì)劃精確研究氧氣在激活光誘導(dǎo)的α-FeOOH反應(yīng)中的作用，因?yàn)楫?dāng)從反應(yīng)室中移除氧氣時(shí)，其完全停止工作。盡管這項(xiàng)技術(shù)仍然需要分解水才能產(chǎn)生氫，但這可能是使用日光的有效方法，而無需任何昂貴的催化劑。 該研究發(fā)表在《Chemistry: A European Journal》雜志上。 |
最新評(píng)論
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bairuizheng 2020-03-02 00:06日本很會(huì)把某些研究產(chǎn)品設(shè)法做到極致
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tassy 2020-03-02 00:43銹與光結(jié)合使氫氣產(chǎn)量提高25倍
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dushunli 2020-03-02 00:55銹與光結(jié)合！
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mang2004 2020-03-02 01:10Hydrogen Production System by Light‐Induced α‐FeOOH Coupled with Photoreduction
Abstract
Solar‐driven catalysts on semiconductors to produce hydrogen are considered as a means to solve environmental issues. In this study, H2 production coupling with oxygen consumption by noble metal‐free α‐FeOOH was demonstrated even though the conduction band edge was lower than the reduction potential of H+ to H2. For activation of α‐FeOOH, an electron donor, Hg‐Xe irradiation, and low pH (ca. 5) were indispensable factors. The H2 production from H2O was confirmed by GC‐MS using isotope‐labeled water (D2O) and deuterated methanol. The α‐FeOOH synthesized by coprecipitation method showed 25 times more active than TiO2. The photocatalytic activity was stable for over 400 h. Our study suggests that α‐FeOOH known as rust can produce H2 by light induction.