Graphene as thinnest coating on copper electrodes in microbial methanol fuel cells

Islam, Jamil (author): Department Civil and Environmental Engineering, South Dakota School of Mines and Technology, SD, Rapid City, United States; BuGReMeDEE Consortium, South Dakota School of Mines and Technology, Rapid City, United States

Obulisamy, Parthiba Karthikeyan (author): Department Civil and Environmental Engineering, South Dakota School of Mines and Technology, SD, Rapid City, United States; BuGReMeDEE Consortium, South Dakota School of Mines and Technology, Rapid City, United States

Dalton, Alan B. (author): Department of Physics and Astronomy, University of Sussex, Brighton, United Kingdom

Ajayan, Pulickel M. (author): Department of Materials Science and Nanoengineering, Rice University, TX, Houston, United States

Rahman, Muhammad M. (author): Department of Materials Science and Nanoengineering, Rice University, TX, Houston, United States

Tripathi, Manoj (author): Department of Physics and Astronomy, University of Sussex, Brighton, United Kingdom

Sani, Rajesh Kumar (author): Department Civil and Environmental Engineering, South Dakota School of Mines and Technology, SD, Rapid City, United States; BuGReMeDEE Consortium, South Dakota School of Mines and Technology, 501 E St Joseph St, SD, Rapid City, United States; 2Dimensional Materials for Biofilm Engineering Science and Technology (2DBEST) Center, South Dakota School of Mines and Technology, SD, Rapid City, United States

Gadhamshetty, Venkataramana (author): Department Civil and Environmental Engineering, South Dakota School of Mines and Technology, SD, Rapid City, United States; BuGReMeDEE Consortium, South Dakota School of Mines and Technology, 501 E St Joseph St, SD, Rapid City, United States; 2Dimensional Materials for Biofilm Engineering Science and Technology (2DBEST) Center, South Dakota School of Mines and Technology, SD, Rapid City, United States

(creator_code:org_t)

2022-12-19
2023
English.
In: ACS Nano. - : American Chemical Society (ACS). - 1936-0851 .- 1936-086X. ; 17:1, s. 137-145

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

Dehydrogenation of methanol (CH3OH) into direct current (DC) in fuel cells can be a potential energy conversion technology. However, their development is currently hampered by the high cost of electrocatalysts based on platinum and palladium, slow kinetics, the formation of carbon monoxide intermediates, and the requirement for high temperatures. Here, we report the use of graphene layers (GL) for generating DC electricity from microbially driven methanol dehydrogenation on underlying copper (Cu) surfaces. Genetically tractable Rhodobacter sphaeroides 2.4.1 (Rsp), a nonarchetypical methylotroph, was used for dehydrogenating methanol at the GL-Cu surfaces. We use electrochemical methods, microscopy, and spectroscopy methods to assess the effects of GL on methanol dehydrogenation by Rsp cells. The GL-Cu offers a 5-fold higher power density and 4-fold higher current density compared to bare Cu. The GL lowers charge transfer resistance to methanol dehydrogenation by 4 orders of magnitude by mitigating issues related to pitting corrosion of underlying Cu surfaces. The presented approach for catalyst-free methanol dehydrogenation on copper electrodes can improve the overall sustainability of fuel cell technologies.

By the author/editor: Islam, Jamil; Obulisamy, Parth ...; Upadhyayula, Ven ...; Dalton, Alan B.; Ajayan, Pulickel ...; Rahman, Muhammad ...; show more...; Tripathi, Manoj; Sani, Rajesh Kum ...; Gadhamshetty, Ve ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Inorganic Chemis ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.