Electrochemical Polymerization of Functionalized ... - ACS Publications

Jul 26, 2017 - Perkin-Elmer Corporation: MN, Eden Prairie, MN. (41) Martin, D. C.; Wu, J.; Shaw, C. M.; King, Z.; Spanninga, S. A.;. Richardson-Burns,...
0 downloads 0 Views 1MB Size
Subscriber access provided by UNIV OF NEWCASTLE

Communication

Electrochemical Polymerization of Functionalized Graphene Quantum Dots Mark B. Miltenburg, Tyler B Schon, Emily L Kynaston, Joseph G. Manion, and Dwight S. Seferos Chem. Mater., Just Accepted Manuscript • DOI: 10.1021/acs.chemmater.7b01700 • Publication Date (Web): 26 Jul 2017 Downloaded from http://pubs.acs.org on July 27, 2017

Just Accepted “Just Accepted” manuscripts have been peer-reviewed and accepted for publication. They are posted online prior to technical editing, formatting for publication and author proofing. The American Chemical Society provides “Just Accepted” as a free service to the research community to expedite the dissemination of scientific material as soon as possible after acceptance. “Just Accepted” manuscripts appear in full in PDF format accompanied by an HTML abstract. “Just Accepted” manuscripts have been fully peer reviewed, but should not be considered the official version of record. They are accessible to all readers and citable by the Digital Object Identifier (DOI®). “Just Accepted” is an optional service offered to authors. Therefore, the “Just Accepted” Web site may not include all articles that will be published in the journal. After a manuscript is technically edited and formatted, it will be removed from the “Just Accepted” Web site and published as an ASAP article. Note that technical editing may introduce minor changes to the manuscript text and/or graphics which could affect content, and all legal disclaimers and ethical guidelines that apply to the journal pertain. ACS cannot be held responsible for errors or consequences arising from the use of information contained in these “Just Accepted” manuscripts.

Chemistry of Materials is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Published by American Chemical Society. Copyright © American Chemical Society. However, no copyright claim is made to original U.S. Government works, or works produced by employees of any Commonwealth realm Crown government in the course of their duties.

Page 1 of 6

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Chemistry of Materials

Electrochemical Polymerization of Functionalized Graphene Quantum Dots Mark B. Miltenburg, Tyler B. Schon, Emily L. Kynaston, Joseph G. Manion, and Dwight S. Seferos* Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada Keywords: graphene quantum dots, nanomaterials, carbon materials, organic electrodes, conjugated polymers, functionalized graphene Graphene and graphene-based materials are highly attractive for applications that include photovoltaics, energy storage, and catalysis, but suffer from challenges associated with large scale processing of high-quality graphene. Graphene quantum dots (GQDs) are sheets of graphene with lateral dimensions less than 100 nm, and are high-quality, soluble graphene materials that are easily functionalized using traditional organic synthetic techniques, opening access to a variety of different chemical, mechanical and optoelectronic properties. In this work, we prepare GQDs where the outer edge is functionalized with chemically addressable 3,4ethylenedioxythiophene (EDOT) units. These EDOT-functionalized GQDs were electrochemically polymerized to form a covalently linked GQD/PEDOT film with properties well-suited for energy storage and catalysis applications. In particular a capacitance of 152.8 F/cm3 at 1.84 A/cm3 was achieved and this is superior to a similarly prepared poly(hydroxymethyl EDOT) film. This work thus introduces a new approach to the preparation of processable and functional graphene-based materials.

Graphene is a two-dimensional sheet of sp2 hybridized carbon atoms. It has been extensively studied due to its intriguing optoelectronic properties.1,2 However, its application in commercialized products has been limited by difficulties associated with processing pristine graphene.3 Graphene quantum dots (GQDs) are small graphene sheets, constrained in their lateral dimensions to