Investigating the Mechanism of Alkyne Hydrogenation through an Open-Ended, Inquiry-Based Undergraduate Research Project Exploring Heterogeneous Catalysis

Autor/inn/en	Mirich, Anne; Enmeier, Mackenzie; Cunningham, Katie; Grossman, Kara; Recker, Grace; Jarman, Samantha; Weinmaster, Tazah; Mehaffey, Reba; Huldin, Grayson; Bacchin, Giorgio; Kallepalli, Samaya; Cogua, Laura; Johnson, Lydia; Mattson, Bruce
Titel	Investigating the Mechanism of Alkyne Hydrogenation through an Open-Ended, Inquiry-Based Undergraduate Research Project Exploring Heterogeneous Catalysis
Quelle	In: Journal of Chemical Education, 97 (2020) 6, S.1579-1587 (9 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Mattson, Bruce)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
Schlagwörter	Science Instruction; College Science; Undergraduate Study; Inorganic Chemistry; Inquiry; Scientific Concepts; Science Laboratories; Science Experiments; Measurement + Suchen Sie Ihr Suchwort? Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Grundstudium; Anorganische Chemie; Messverfahren
Abstract	The catalytic hydrogenation of alkenes and alkynes is an important part of the undergraduate chemistry curriculum and is a fundamental process in chemical industry. Inquiry-based laboratory activities are presented that investigate the hydrogenation of alkynes on a nanoparticle palladium surface to form alkenes, which go on to form alkanes. Alkyne hydrogenation using H[subscript 2] and/or D[subscript 2] proceeds via a vinyl-palladium intermediate to form a [pi]-bonded alkene-Pd species that can desorb or remain on the palladium surface and undergo further hydrogenation via the Horiuti-Polanyi mechanism, associated with extensive deuterium-hydrogen exchange. Central to the experiments is an inexpensive, easy-to-build glass tube containing palladium nanoparticles on alumina beads that can be used indefinitely. A total of seven inquiry-based questions are discussed regarding hydrogenation of alkynes. A similar number of open questions are discussed for further investigations by interested persons. These activities are suitable as guided research projects for science majors. Each experiment is performed by groups of two or three students in about an hour including analysis by mass spectrometry. An additional hour is allowed for student analysis and discussion of the mass spectral results, writeup, and future planning followed by about 30 min with the mentor for group presentation and discussion of the results. Results often lead to additional questions, either for clarification or for new exploration and form the basis for inquiry-based learning and problem-solving. (As Provided).
Anmerkungen	Division of Chemical Education, Inc. and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01