Ultrapure Graphene Is a Poor Electrocatalyst: Definitive Proof of the Key Role of Metallic Impurities in Graphene-Based Electrocatalysis

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F19%3A00503696" target="_blank" >RIV/61389005:_____/19:00503696 - isvavai.cz</a>
Alternative codes found
RIV/61388963:_____/19:00503696 RIV/60461373:22310/19:43918030 RIV/00216305:26620/19:PU133187
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acsnano.8b07534" target="_blank" >https://pubs.acs.org/doi/10.1021/acsnano.8b07534</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsnano.8b07534" target="_blank" >10.1021/acsnano.8b07534</a>

Result language
angličtina
Original language name
Ultrapure Graphene Is a Poor Electrocatalyst: Definitive Proof of the Key Role of Metallic Impurities in Graphene-Based Electrocatalysis
Original language description
Graphene and its derivatives have been reported in many articles as ”metal-free“ carbon electrocatalytic materials. Its synthesis procedures are generally based on the chemical oxidation of graphite and subsequent thermal or chemical reduction. Because graphene oxide has a large surface area and typically contains a variety of oxygen functionalities, metallic ions (impurities) from reaction mixtures can be adsorbed on its surface. These impurities can significantly enhance the electrocatalytic activity and thus lead to data misinterpretation, such impure samples are referred to as ”metal-free“ catalysts. In this paper, we report the synthesis of impurity-free graphene, which is compared with graphene prepared by standard methods based on the thermal and chemical reduction of two graphene oxides. Detailed analysis of graphene prepared by standard methods shows a direct relation between metallic impurities and the electrocatalytic activity of graphene. In contrast, impurity-free graphene exhibits poor electrocatalytic activity.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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