Dissociation of Sulfuric Acid in Aqueous Solution: Determination of the Photoelectron Spectral Fingerprints of H2SO4, HSO4鈥?/sup>, and SO42鈥?/sup>

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• 作者：Alexandria M. Margarella ; Kathryn A. Perrine ; Tanza Lewis ; Manfred Faubel ; Bernd Winter ; John C. Hemminger
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：April 25, 2013
• 年：2013
• 卷：117
• 期：16
• 页码：8131-8137
• 全文大小：305K
• 年卷期：v.117,no.16(April 25, 2013)
• ISSN：1932-7455

文摘

In the work described here, the electronic structure of sulfuric acid in water is explored by liquid-jet photoelectron spectroscopy. From the S2p photoelectron spectra of H₂SO₄聽(aq), measured over a large concentration range and aided by previously reported HSO₄^{鈥?/sup>/SO₄2- and HSO₄鈥?/sup>/H₂SO₄ concentration ratios in the bulk solution, we obtain detailed electronic structure information of each species. Comparing our results with previous studies on the dissociation of nitric acid, we argue that the solvation structure of H₂SO₄聽(aq) changes around 5鈥? M concentration, at which point a dramatic change in both the HSO₄鈥?/sup> photoelectron peak width and binding energy occurs.}