Controlled Electrochemical Carboxylation of Graphene To Create a Versatile Chemical Platform for Further Functionalization

Emil Bjerglund Pedersen; Mikkel S. Kongsfelt; Kyoko Shimizu; Bjarke Bror Egede Jensen; Line Koefoed; Marcel Ceccato; Troels Skrydstrup; Steen Uttrup Pedersen; Kim Daasbjerg

Controlled Electrochemical Carboxylation of Graphene To Create a Versatile Chemical Platform for Further Functionalization

Emil Bjerglund Pedersen, Mikkel S. Kongsfelt, Kyoko Shimizu, Bjarke Bror Egede Jensen, Line Koefoed, Marcel Ceccato, Troels Skrydstrup, Steen Uttrup Pedersen, Kim Daasbjerg

Research output: Contribution to conference › Poster › Research

24 Citations (Scopus)

Abstract

An electrochemical approach is introduced for the versatile carboxylation of multilayered graphene in 0.1 M Bu4NBF4/MeCN. First, the graphene substrate is
negatively charged at −1.9 V vs. Ag/AgI to allow for intercalation of Bu4N+. In the second step, the strongly activated and nucleophilic graphene is allowed to react with added CO2 in an addition reaction, introducing carboxylate groups stabilized by the Bu4N+ already present. This procedure may be carried out repetitively to further increase the carboxylation degree under controlled conditions. We observe an equal functionalization degree throughout the multilayered graphene structure, independent of the number of graphene sheets. This is assumed to be due to an opening of the entire graphene structure in response to the intercalation of Bu4N+. Hence, this electrochemical method offers a versatile procedure to make all graphene sheets in a multi-layered but expanded structure accessible for functionalization. On a more general level, this approach will provide a versatile way of forming new hybrid materials based on intimate bond coupling to graphene via carboxylate groups.

Original language	English
Publication date	Jun 2014
Publication status	Published - Jun 2014
Event	Graphene Week 2014 - Stockholm, Sweden Duration: 23 Jun 2014 → 27 Jun 2014

Conference

Conference	Graphene Week 2014
Country/Territory	Sweden
City	Stockholm
Period	23/06/2014 → 27/06/2014

Cite this

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title = "Controlled Electrochemical Carboxylation of Graphene To Create a Versatile Chemical Platform for Further Functionalization",

abstract = "An electrochemical approach is introduced for the versatile carboxylation of multilayered graphene in 0.1 M Bu4NBF4/MeCN. First, the graphene substrate isnegatively charged at −1.9 V vs. Ag/AgI to allow for intercalation of Bu4N+. In the second step, the strongly activated and nucleophilic graphene is allowed to react with added CO2 in an addition reaction, introducing carboxylate groups stabilized by the Bu4N+ already present. This procedure may be carried out repetitively to further increase the carboxylation degree under controlled conditions. We observe an equal functionalization degree throughout the multilayered graphene structure, independent of the number of graphene sheets. This is assumed to be due to an opening of the entire graphene structure in response to the intercalation of Bu4N+. Hence, this electrochemical method offers a versatile procedure to make all graphene sheets in a multi-layered but expanded structure accessible for functionalization. On a more general level, this approach will provide a versatile way of forming new hybrid materials based on intimate bond coupling to graphene via carboxylate groups.",

author = "{Bjerglund Pedersen}, Emil and Kongsfelt, {Mikkel S.} and Kyoko Shimizu and Jensen, {Bjarke Bror Egede} and Line Koefoed and Marcel Ceccato and Troels Skrydstrup and Pedersen, {Steen Uttrup} and Kim Daasbjerg",

year = "2014",

month = jun,

language = "English",

note = "Graphene Week 2014 ; Conference date: 23-06-2014 Through 27-06-2014",

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TY - CONF

T1 - Controlled Electrochemical Carboxylation of Graphene To Create a Versatile Chemical Platform for Further Functionalization

AU - Bjerglund Pedersen, Emil

AU - Kongsfelt, Mikkel S.

AU - Shimizu, Kyoko

AU - Jensen, Bjarke Bror Egede

AU - Koefoed, Line

AU - Ceccato, Marcel

AU - Skrydstrup, Troels

AU - Pedersen, Steen Uttrup

AU - Daasbjerg, Kim

PY - 2014/6

Y1 - 2014/6

N2 - An electrochemical approach is introduced for the versatile carboxylation of multilayered graphene in 0.1 M Bu4NBF4/MeCN. First, the graphene substrate isnegatively charged at −1.9 V vs. Ag/AgI to allow for intercalation of Bu4N+. In the second step, the strongly activated and nucleophilic graphene is allowed to react with added CO2 in an addition reaction, introducing carboxylate groups stabilized by the Bu4N+ already present. This procedure may be carried out repetitively to further increase the carboxylation degree under controlled conditions. We observe an equal functionalization degree throughout the multilayered graphene structure, independent of the number of graphene sheets. This is assumed to be due to an opening of the entire graphene structure in response to the intercalation of Bu4N+. Hence, this electrochemical method offers a versatile procedure to make all graphene sheets in a multi-layered but expanded structure accessible for functionalization. On a more general level, this approach will provide a versatile way of forming new hybrid materials based on intimate bond coupling to graphene via carboxylate groups.

AB - An electrochemical approach is introduced for the versatile carboxylation of multilayered graphene in 0.1 M Bu4NBF4/MeCN. First, the graphene substrate isnegatively charged at −1.9 V vs. Ag/AgI to allow for intercalation of Bu4N+. In the second step, the strongly activated and nucleophilic graphene is allowed to react with added CO2 in an addition reaction, introducing carboxylate groups stabilized by the Bu4N+ already present. This procedure may be carried out repetitively to further increase the carboxylation degree under controlled conditions. We observe an equal functionalization degree throughout the multilayered graphene structure, independent of the number of graphene sheets. This is assumed to be due to an opening of the entire graphene structure in response to the intercalation of Bu4N+. Hence, this electrochemical method offers a versatile procedure to make all graphene sheets in a multi-layered but expanded structure accessible for functionalization. On a more general level, this approach will provide a versatile way of forming new hybrid materials based on intimate bond coupling to graphene via carboxylate groups.

M3 - Poster

T2 - Graphene Week 2014

Y2 - 23 June 2014 through 27 June 2014

ER -