The capacitance and electron transfer of 3D-printed graphene electrodes are dramatically influenced by the type of solvent used for pre-treatment

Rui Gusmão, Michelle P. Browne, Zdenek Sofer, Martin Pumera

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

3D-printing (or additive manufacturing) is presently an emerging technology that promises to reshape traditional manufacturing processes. The electrochemistry field can certainly take advantage of this fabrication tool for sensing and energy-related applications. Polymer/graphene filaments commonly used for the fabrication of 3D-printed electrodes show poor electrochemistry in the native state, requiring post-fabrication activation procedures. In the present work, solvent activation of graphene/polymer-based 3D-printed electrodes was investigated, using both polar aprotic solvents (DMF and acetone) and polar protic solvents (EtOH, MeOH, and H 2 O). Differences were noted with respect to the weight loss and surface morphologies of the activated electrodes prior to their use, depending the solvent used. The electrodes activated in polar aprotic solvents exhibit a dramatic increase in heterogeneous electron transfer rate using the Fe(CN 6 ) 4−/3− redox couple. Moreover, the activation medium has a crucial influence on the electrochemical double layer. We wish to provide meaningful insight to researchers by comparing results obtained with 3D-printed electrodes fabricated from graphene/polymer filaments and drawing attention to the influence of the solvents used in their activation.

Original languageEnglish
Pages (from-to)83-88
Number of pages6
JournalElectrochemistry Communications
Volume102
DOIs
Publication statusPublished - 2019 May

Bibliographical note

Funding Information:
This work was supported by the project Advanced Functional Nanorobots (reg. No. CZ.02.1.01/0.0/0.0/15_003/0000444 financed by the EFRR). R.G. acknowledges the European Structural and Investment Funds and the Ministry of Education, Youth and Sport of the Czech Republic (MEYS) for funded CHEMFELL4UCTP project (No. CZ.02.2.69/0.0/0.0/17_050/0008485 ). M.P.B. would like to acknowledge the European Structural and Investment Funds, OP RDE-funded project “ChemJets” (No. CZ.02.2.69/0.0/0.0/16_027/0008351 ). This work was created with the financial support of the Neuron Foundation for science support .

Publisher Copyright:
© 2019

All Science Journal Classification (ASJC) codes

  • Electrochemistry

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