Number of the records: 1
Ultrapure Graphene Is a Poor Electrocatalyst: Definitive Proof of the Key Role of Metallic Impurities in Graphene-Based Electrocatalysis
- 1.
SYSNO ASEP 0503696 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Ultrapure Graphene Is a Poor Electrocatalyst: Definitive Proof of the Key Role of Metallic Impurities in Graphene-Based Electrocatalysis Author(s) Mazánek, V. (CZ)
Luxa, J. (CZ)
Matějková, Stanislava (UOCHB-X) RID, ORCID
Kučera, Jan (UJF-V) RID, ORCID, SAI
Sedmidubský, D. (CZ)
Pumera, M. (CZ)
Sofer, Z. (CZ)Source Title ACS Nano. - : American Chemical Society - ISSN 1936-0851
Roč. 13, č. 2 (2019), s. 1574-1582Number of pages 9 s. Language eng - English Country US - United States Keywords metallic impurities ; purification ; graphene ; electrocatalysis ; doping ; neutron activation analysis Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry R&D Projects GA16-05167S GA ČR - Czech Science Foundation (CSF) LM2015056 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UOCHB-X - RVO:61388963 ; UJF-V - RVO:61389005 UT WOS 000460199400058 EID SCOPUS 85060285444 DOI 10.1021/acsnano.8b07534 Annotation 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. Workplace Institute of Organic Chemistry and Biochemistry Contact asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434 Year of Publishing 2020 Electronic address https://pubs.acs.org/doi/10.1021/acsnano.8b07534
Number of the records: 1