{"433041":{"#nid":"433041","#data":{"type":"event","title":"PhD Proposal by Adam Vitale","body":[{"value":"\u003Cp\u003EMSE PhD Proposal - Adam Vitale\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EDate\/Time: Wednesday August 19\u003Csup\u003Eth\u003C\/sup\u003E at 5 p.m.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003ELocation:\u0026nbsp; Room 3515, Hightower Conference Room, MRDC\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003ECommittee:\u003C\/p\u003E\u003Cp\u003E\u2022\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Faisal Alamgir (Advisor, Materials Science and Engineering)\u003C\/p\u003E\u003Cp\u003E\u2022\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Meilin Liu (Materials Science and Engineering)\u003C\/p\u003E\u003Cp\u003E\u2022\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Preet Singh (Materials Science and Engineering)\u003C\/p\u003E\u003Cp\u003E\u2022\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Eric Vogel (Materials Science and Engineering)\u003C\/p\u003E\u003Cp\u003E\u2022\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Krista Walton (Chemical \u0026amp; Biomolecular Engineering)\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EThesis Title: Near Surface Evaluation of Structural, Electronic and Chemical Properties of Templated Pt Monolayers\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EAbstract: Platinum group metals are the choice catalysts for a wide variety of catalytic reactions, including oxygen reduction. The focus of this study is to explore the dimensional aspect of both electronic and structure-driven surface properties of Pt monolayers grown via templating on Au. Surface limited redox replacement is used to provide precise layer-by-layer growth of Pt to synthesize well-controlled \u2018core-shell\u2019 catalyst architectures.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EThe interaction between core and shell manifests itself through both a structural contribution of epitaxial strain and d-electron orbital mixing. The cumulative effect of the secondary support on the surface Pt and its interaction with adsorbate species is referred to as a ligand effect. The main goal of the research is to investigate how these ligand effects contribute to the structural and electronic properties of Pt monolayer catalysts.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EOne focus of our study is to explore the incorporation of two dimensional materials into the core-shell catalyst architecture. Materials such as single-layer graphene and transition metal dichalcogenides have shown potential for increased activity and stability when used as supports. We have found that fully wetted 4-5 monolayer Pt films can be grown on graphene, maximizing the exposed catalyst surface with high Pt utilization. The research also looks to investigate the use of single-layer graphene as an intimate capping sheet to prevent surface dissolution of electrode metals into the electrolyte, without adversely affecting activity. \u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EX-ray photoelectron spectroscopy and extended x-ray absorption fine structure techniques are used to examine surface composition and local atom-atom correlations (bond distance, strain, coordination) as well as core-shell charge transfer effects. Cyclic voltammetry and the oxygen reduction reaction are used as probes to examine the electrochemically active area of Pt monolayers and catalyst activity, respectively. \u003C\/p\u003E\u003Cp\u003E \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Near Surface Evaluation of Structural, Electronic and Chemical Properties of Templated Pt Monolayers"}],"uid":"27707","created_gmt":"2015-08-11 08:39:25","changed_gmt":"2016-10-08 02:12:51","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-08-19T18:00:00-04:00","event_time_end":"2015-08-19T20:00:00-04:00","event_time_end_last":"2015-08-19T20:00:00-04:00","gmt_time_start":"2015-08-19 22:00:00","gmt_time_end":"2015-08-20 00:00:00","gmt_time_end_last":"2015-08-20 00:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"102851","name":"Phd proposal"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}