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Analysis of institutional authors

Recio, F JavierCorresponding Author

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September 8, 2024
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Influence of surface terminal groups on the efficiency of two-electron oxygen reduction reaction catalyzed by iron single atoms on Ti3C2Tx (T = Cl, Br, NH) MXene

Publicated to: Journal Of Materials Chemistry a. 12 (37): 25291-25303 - 2024-09-24 12(37), DOI: 10.1039/d4ta02721c

Authors:

Kruger, DD; Delgado, JJ; Recio, FJ; Goberna-Ferron, S; Primo, A; Garcia, H
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Affiliations

Univ Autonoma Madrid, Fac Ciencias, Dept Quim Fis Aplicada, C-Francisco Tomas & Valiente 7, Madrid 28049, Spain - Author
Univ Cadiz, Mat Sci & Met Engn & Inorgan Chem, Cadiz 11510, Spain - Author
Univ Politecn Valencia, CSIC, Inst Univ Tecnol Quim, UPV, Av Naranjos S-N, Valencia 46022, Spain - Author
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Abstract

Two Ti3C2 MXenes having single atom Fe were prepared from a Ti3AlC2 precursor by Al etching using an FeX2 (X = Cl, Br) Lewis acid as an etching reagent in NaCl/KCl molten salt. After removal of the excess Fe metal using concentrated aqueous HX solution, the resulting MXenes having Cl or Br surface terminations were concomitantly doped with single Fe atoms. A third sample was prepared from Fe(SA)-Ti3C2Brx by exchanging Br with -NH- using LiNH2 in molten salt. The presence of single atom Fe was determined by aberration corrected high-angle annular dark-field scanning transmission electron microscopy (AC-HAADF-STEM) with atomic resolution where isolated Fe atoms were observed. These Fe(SA)-Ti3C2Tx materials exhibit electrocatalytic activity for the oxygen reduction reaction (ORR), with the selectivity to H2O2 depending on the surface termination and the electrolyte pH. Involvement of Fe SA was inferred from the onset potential of the ORR and the Fe(III)/Fe(II) reduction potential and the change of the Tafel slope in this region. Under the best conditions, at pH 13, Fe(SA)-Ti3C2(NH)(x) exhibits for the ORR an average electron transfer number (n) of 2.5, which corresponds to an H2O2 generation efficiency of 75%; these data compare well with those of the best Fe single-atom electrocatalysts.
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Keywords

CarbideDefectsEvolutionH2oPhase

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Journal of Materials Chemistry A due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2024 there are still no calculated indicators, but in 2023, it was in position 63/461, thus managing to position itself as a Q1 (Primer Cuartil), in the category Materials Science, Multidisciplinary.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2026-04-04:

  • WoS: 8
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-04-04:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 14.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 14 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 5.
  • The number of mentions on the social network X (formerly Twitter): 7 (Altmetric).
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Leadership analysis of institutional authors

the author responsible for correspondence tasks has been RECIO CORTES, FRANCISCO JAVIER.

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Awards linked to the item

Financial support was provided by the Spanish Ministry of Science and Innovation (CEX-2021-001230-S, PID2021-126071OB-C21\ and PID2021-123431OB-I00 funded by MCIN/AEI/10.13039/501100011033) and Generalitat Valenciana (Prometeo 2021/038 and Advanced Materials programme Graphica MFA/2022/023 with funding from European Union NextGenerationEU PRTR-C17.I1). The European Commission (ERC Adv., Grant Discovery) is also acknowledged. We thank the Advanced Microscopy Center of the University of Cadiz for granting instrument time.
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