Designing electrocatalysts from earth-abundant elements: Towards a sustainable future of electroorganic synthesis

​Dr. Alexander Giovannitti will give his research presentation for Assistant Professor within the Materials Science Area of Advance. Welcome!​​​
WHO: Alexander Giovannitti, Stanford University.
​WHEN: 7 June, 09:30–10:20
WHERE: PJ, seminar room, Kemigården 1, Fysik Origo, Chalmers Campus Johanneberg

​​ABSTRACT:Alexander Giovannetti
Employing earth-abundant carbon-based materials as a platform for green chemical synthesis unlocks a new pathway to lowering the carbon intensity of the chemical industry. Electroorganic synthesis, where chemical reactions are driven by electric current, has already demonstrated significant success using state-of-the-art electrode materials made of precious metals from the platinum group. Moving towards replacing these scarce and synthetically limited materials with earth-abundant carbon-based electrocatalysts will enhance scalability and open new avenues to a sustainable future.

In my talk, I will introduce a new class of materials for developing electrocatalysts solely made of earth-abundant elements. These materials are conjugated polymers with hydrophilic side chains, so-called organic mixed ionic electronic conductors (OMIECs) [1,2]. When employed as the electrocatalysts for reductive reactions, these materials achieve high activities, selectivities, and stabilities. Using the oxygen reduction reactions as a model system, I will showcase the chemical design principles for OMIECs that achieve high performance for reductive electrocatalytic reactions. Due to the high solubility of the materials in organic solvents, electrodes can be prepared from solution, providing opportunities for low-cost fabrication of electrodes at scale [3]. Furthermore, the balanced ionic, electronic, and mass transport properties of OMIECs enable operating electrodes as binder- and additive-free electrodes with volumetric- rather than surface activity.  Finally, I will discuss the future design strategies for OMIECs to unlock high performance and long-term stability as electrocatalysts for electroorganic synthesis.

[1] Giovannitti, A., Sbircea ,D.T., Inal, S.,  et. al., Proc. Natl. Acad. Sci. 2016, 113, 12017.  [2] Giovannitti, A.,  Nielsen, C.B.,  Sbircea, D.T., et. al., Nat. Commun. 2016, 7, 13066-13075.  [3] Tan, S.T.M., Quill, T.J., Moser, M., et. al. ACS Energy Lett. 2021, 6, 3450–3457.

Contact: Maria Abrahamsson​, Director, Materials Science Area of Advance. 
Leif Asp​, Co-Director, Materials Science Area of Advance. 
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Location:
Starts: 07 June, 2022, 09:30
Ends: 07 June, 2022, 10:20

Page manager Published: Tue 24 May 2022.