Decomposition of formic acid on FeTi |
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| Institution: | 1. Department of Chemistry, Faculty of Science, University of Chittagong, Chattogram 4331, Bangladesh;2. Department of Chemistry, Faculty of Engineering & Technology, Chittagong University of Engineering & Technology, Chattogram 4349, Bangladesh;3. BGC Trust University Bangladesh, BGC Biddyanagar, Chandanaish, Chattogram 4380, Bangladesh;4. Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima City, Fukushima 960-1296, Japan;5. Department of Civil Engineering, Southern University Bangladesh, Arefin Nagar, Bayezid Bostami, Chattogram 4210, Bangladesh;1. Dept. of Chemistry, Rani Channamma University, Belagavi 591156, Karnataka, India;2. Dept. of Materials Science and Engineering, Iwate University, Morioka 020-8551, Japan |
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| Abstract: | The adsorption and decomposition of formic acid on clean and hydrogen pretreated FeTi was studied using XPS and ISS. Ion scattering spectroscopy was used to establish that the clean and hydrogen pretreated surfaces contained both Ti and Fe. The initial interaction of HCOOH with clean FeTi at 170 K results in dissociation to COads, Cads and Oads. At higher exposures an adsorbed formate state is populated. The latter species is identified as a monodentate formate, and it is stable to 400 K. The decomposition product COads dissociates at temperatures above 460 K. All of the deposited carbon is incorporated into the bulk at temperatures above 600 K. Hydrogen pretreatment inhibits the dissociation of HCOOads on FeTi at 170 K. We attribute the effect to a decreased Brönsted basicity of the surface. No such effect is observed at room temperature or above. |
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