Water Chemisorption and Reconstruction of the MgO Surface

The observed reactivity of MgO with water is in apparent conflict with theoretical calculations which show that molecular dissociation does not occur on a perfect (001) surface. We have performed ab-initio total energy calculations which show that a chemisorption reaction involving a reconstruction to form a (111) hydroxyl surface is strongly preferred with Delta E = -90.2kJ/mol. We conclude that protonation stabilizes the otherwise unstable (111) surface and that this, not the bare (001), is the most stable surface of MgO under ambient conditions.Comment: RevTeX, 4 pages, 1 Encapsulated Postscript Figur

Projects of devotion : energy exploration and moral ambition in the cosmoeconomy of oil and gas in the Western United States

This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant agreement No 715146. The authors also acknowledge the funding received to carry out this research from the Leverhulme Trust (ECF‐2013‐177) and the British Academy (EN150010).This article considers how people working in the oil and gas industry in Colorado perceive their involvement in energy exploration in relation to broader understandings of devotion, compassion, and outreach. I argue that although their energy projects may appear to merely echo companies’ formal promotional pitches, the oil field and corporate actors’ own moral ambitions reveal more-than-human cosmoeconomic visions of oil’s potentiality. This article thus demonstrates how multiple and diverging ethical registers intersect and inform the valuation of oil.Publisher PDFPeer reviewe

Identifying the roles of amino acids, alcohols and 1,2-diamines as mediators in coupling of haloarenes to arenes

Coupling of haloarenes to arenes has been facilitated by a diverse range of organic additives in the presence of KO(t)Bu or NaO(t)Bu since the first report in 2008. Very recently, we showed that the reactivity of some of these additives (e.g., compounds 6 and 7) could be explained by the formation of organic electron donors in situ, but the role of other additives was not addressed. The simplest of these, alcohols, including 1,2-diols, 1,2-diamines, and amino acids are the most intriguing, and we now report experiments that support their roles as precursors of organic electron donors, underlining the importance of this mode of initiation in these coupling reactions