M
Michael R. Hoffmann
Researcher at California Institute of Technology
Publications - 522
Citations - 70877
Michael R. Hoffmann is an academic researcher from California Institute of Technology. The author has contributed to research in topics: Aqueous solution & IUCN Red List. The author has an hindex of 109, co-authored 500 publications receiving 63474 citations. Previous affiliations of Michael R. Hoffmann include Clarkson University & International Union for Conservation of Nature and Natural Resources.
Papers
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Oxidation of Gas-Phase SO2 on the Surfaces of Acidic Microdroplets: Implications for Sulfate and Sulfate Radical Anion Formation in the Atmospheric Liquid Phase.
TL;DR: Surface chemical reactions on aquated aerosol surfaces, as observed in this study, are overlooked in most atmospheric chemistry models and may contribute to the rapid production of sulfate aerosols that is often observed in regions impacted by acidic haze aerosol such as Beijing and other megacities around the world.
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Electron Traps and the Stark Effect on Hydroxylated Titania Photocatalysts
TL;DR: In this article, the authors showed that shallow electron traps are not associated with localized structures, but rather are delocalized across the TiO_2 surface, which may explain the photon-dependent wettability of TiO-2 surfaces.
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Sonochemical Degradation of Perfluorooctanesulfonate in Aqueous Film-Forming Foams
TL;DR: Results of the sonochemical degradation of aqueous dilutions of FC-600 are presented, indicating that bubble-water interfacial pyrolytic cleavage of the C-S bond in PFOS is the initial degradation step, in agreement with previous studies done in Milli-Q water.
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Novel Photocatalytic Mechanisms for CHCl3, CHBr3, and CCl3CO2- Degradation and the Fate of Photogenerated Trihalomethyl Radicals on TiO2
Wonyong Choi,Michael R. Hoffmann +1 more
TL;DR: In this article, the photocatalytic degradation of CHCl_3, CHBr_3 and CCl_4 was investigated in aqueous TiO_2 suspensions. And a new mechanism for CCl3CO_2^- degradation was proposed, which involves the formation of a dichlorocarbene intermediate.
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The difference conservation makes to extinction risk of the world's ungulates
Michael R. Hoffmann,Michael R. Hoffmann,J.W. Duckworth,Katharine Holmes,David Mallon,Ana S. L. Rodrigues,Simon N. Stuart +6 more
TL;DR: The difference conservation action makes to the conservation status of the world's ungulate species is likely to be higher than previously estimated and increased, and sustained, investment could help achieve further improvements.