Počet záznamů: 1
Ultrapure Graphene Is a Poor Electrocatalyst: Definitive Proof of the Key Role of Metallic Impurities in Graphene-Based Electrocatalysis
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SYSNO ASEP 0503696 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Ultrapure Graphene Is a Poor Electrocatalyst: Definitive Proof of the Key Role of Metallic Impurities in Graphene-Based Electrocatalysis Tvůrce(i) 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)Zdroj.dok. ACS Nano. - : American Chemical Society - ISSN 1936-0851
Roč. 13, č. 2 (2019), s. 1574-1582Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova metallic impurities ; purification ; graphene ; electrocatalysis ; doping ; neutron activation analysis Vědní obor RIV CA - Anorganická chemie Obor OECD Inorganic and nuclear chemistry CEP GA16-05167S GA ČR - Grantová agentura ČR LM2015056 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Omezený přístup Institucionální podpora UOCHB-X - RVO:61388963 ; UJF-V - RVO:61389005 UT WOS 000460199400058 EID SCOPUS 85060285444 DOI 10.1021/acsnano.8b07534 Anotace 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. Pracoviště Ústav organické chemie a biochemie Kontakt asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Jana Procházková, Tel.: 220 183 418 Rok sběru 2020 Elektronická adresa https://pubs.acs.org/doi/10.1021/acsnano.8b07534
Počet záznamů: 1