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hq214567849金蟲 (初入文壇)
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[求助]
求大神翻譯一下這段摘要，謝謝
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| ABSTRACT: The polyanion of formula {Co9(H2O)6(OH)3(HPO4)2(PW9O34)3}16− (Co9) contains a central nonacobalt core held together by hydroxo and hydrogen phosphate bridges and supported by three lacunary Keggin-type polyphosphotungstate ligands. Our data demonstrate that Co9 is a homogeneous catalyst for water oxidation.Catalytic water electrolysis on fluorine-doped tin oxide coated glass electrodes occurs at reasonable low overpotentials and rates when Co9 is present in a sodium phosphate buffer solution at neutral pH. We carried out our experiments with an excess of 2,2′-bipyridyl as the chelating agent for free aqueous CoII ions, in order to avoid the formation of a cobalt oxide film on the electrode, as observed for other polyoxometalate catalysts. In these conditions, no heterogeneous catalyst forms on the anode, and it does not show any deposited material or significant catalytic activity after a catalytic cycle. Co9 is also an extremely robust catalyst for chemical water oxidation. It is able to continuously catalyze oxygen evolution during days from a buffered sodium hypochlorite solution, maintaining constant rates and efficiencies without any significant apparition of fatigue. |
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jnxybsf
金蟲 (正式寫手)
- 翻譯EPI: 15
- 應(yīng)助: 0 (幼兒園)
- 金幣: 1305.4
- 散金: 73
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- 在線: 81.8小時(shí)
- 蟲號(hào): 2042949
- 注冊(cè): 2012-10-04
- 專業(yè): 元素化學(xué)
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
hq214567849: 金幣+30, 翻譯EPI+1, ★★★很有幫助, 謝謝，已經(jīng)很好了 2015-12-08 17:03:15
hq214567849: 金幣+30, 翻譯EPI+1, ★★★很有幫助, 謝謝，已經(jīng)很好了 2015-12-08 17:03:15
| {Co9(H2O)6(OH)3(HPO4)2(PW9O34)3}16− (Co9)含有一個(gè)中心納米鈷核，該核由羥基和磷酸氫共同橋聯(lián)，并被三個(gè)有孔Keggin型磷鎢雜多酸配體承載。我們的數(shù)據(jù)表明Co9是一種水氧化的均相催化劑。當(dāng)Co9處于中性PH值的磷酸鈉緩沖溶液中時(shí)，水的催化電解會(huì)在渡有添加氟的氧化錫涂層的的玻璃電極上以適當(dāng)?shù)偷倪^電位和速率發(fā)生。為了避免像其他的多金屬氧酸鹽催化劑那樣電極上形成氧化鈷膜，我們實(shí)驗(yàn)中用過量的2,2聯(lián)吡啶做為螯合劑以保證水相中自由的二價(jià)鈷離子。在該條件下，陽極上沒有 形成非均相催化劑，并且在經(jīng)過一個(gè)催化循環(huán)后，沒有出現(xiàn)任何沉積物和明顯的催化活性。Co9也是一種非�；钴S的水氧化催化劑，它能夠以恒定的速率和效率持續(xù)地從次磷酸銨鈉緩沖溶液中催化析氧，且不會(huì)出現(xiàn)明顯的衰減跡象。 外行，有些專業(yè)術(shù)語不準(zhǔn) |
2樓2015-12-08 01:13:13
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