Carbon black hybrid material furnished monodisperse platinum nanoparticles as highly efficient and reusable electrocatalysts for formic acid electro-oxidation
Authors: Yunus Yƒ±ldƒ±z
Handan Pamuk
√ñzlem Karatepe
Zeynep Dasdelen
Fatih Sen
Journal: RSC Advances (2016)
Discipline: CHEMISTRY
Keywords: Platinum nanoparticles; Vulcan Carbon-Activated Carbon; catalysts; formic acid oxidation; tripropylamine
Affiliations: Sen Research Group, Biochemistry Department, Faculty of Art and Science, Dumlupƒ±nar University, 43100 K√ºtahya

Abstract: Monodisperse platinum nanoparticles (Pt NPs) furnished with a Vulcan Carbon-Activated Carbon (VC-AC) hybrid have been prepared in the presence of tripropylamine (TPrA) and used as novel catalysts (Pt NPs/TPrA@VC-AC) for formic acid oxidation (FAO) reactions at room temperature. The characteristics of the novel catalysts have been characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), high resolution transmission electron microscopy (HRTEM), cyclic voltammetry (CV) and chronoamperometry (CA). The X-ray diffractograms of all the prepared electrocatalysts showed the typical face-centered cubic (FCC) structure. Chronoamperometry and cyclic voltammetry measurements showed a strong increase in the performance of Pt NPs/TPrA@VC, Pt NPs/TPrA@AC and Pt NPs/TPrA@VC-AC hybrid material electrocatalysts after formic acid addition, but the Pt NPs@VC-AC electrocatalyst showed the best performance compared to Pt NPs/TPrA@VC and Pt NPs/TPrA@AC.

Retracted: Yes

PubPeer comments:
 This paper appears to be one of a set of at least 2 papers by the same research group that both appear to share the same photo. In both papers, this photo is used as a high-resolution transmission electron microscopy (HRTEM) analysis of the  atomic lattice fringe and particle size of the nanoparticles. Of concern, the same photo is used to represent a different type of nanoparticle in each of these papers. The two papers that appear to be using the same photo,  Inset 7 are: * Yunus Yu0131ldu0131z et al. (2016) - DOI: 10.1039 c6ra00232c - Pt TPrA@VC-AC  * Yunus Yu0131ldu0131z et al. (2017) - DOI: 10.1016 j.ijhydene.2017.03.230 - Pt TPA@rGO  Here is a close up comparison between the two images, with one of them rotated 180 degrees:  Of note, this is a different set of papers than the 30 papers by the same group that all appear to use another HRTEM image called  Inset 1 . For an example of that photo and the list of those 30 papers, see DOI 10.1016 j.ijhydene.2018.03.175 https: pubpeer.com publications 8AD71F4A32472314CCE9983D47E36F It is also a different set of papers than the 14 papers by the same group that all appear to use another HRTEM image called  Inset 2 . For an example of that photo and the list of those 14 papers, see DOI: 10.1016 j.ijhydene.2017.05.113 https: pubpeer.com publications CAD2F16435F6C639F5DE6851A2E61D , 
 Retraction, October 2021: https: pubs.rsc.org en content articlelanding 2021 ra d1ra90153b  The Royal Society of Chemistry hereby wholly retracts this RSC Advances article due to concerns with the reliability of the data in the published article. The high resolution transmission electron micrograph inset in Fig. 2 that represents Pt NPs TPrA@VC-AC is a duplicated and rotated version of the inset in Fig. 2a in an International Journal of Hydrogen Energy article by the same authors,1 which is a high resolution transmission electron micrograph representing Pt TPA@rGO NPs. Fig. S1 in the ESI of this RSC Advances article, which is a transmission electron micrograph representing Pt NPs TPrA@VC, is a duplicated and scaled version of Fig. S2, also in the ESI, which is a transmission electron micrograph representing Pt NPs TPrA@AC. The authors claim that these are mistakes and provided replacement data for consideration. However, an expert reviewed the authorsu2019 response and concluded that it did not satisfactorily address the concerns, and that the replacement figures did not fully support the conclusions. Given the significance of the concerns about the validity of the data, the findings presented in this paper are no longer reliable. Fatih Sen opposes this retraction. Handan Pamuk, Yunus Yu0131ldu0131z, Ozlem Karatepe and Zeynep Dasdelen were contacted but did not respond. Signed: Laura Fisher, Executive Editor, RSC Advances Date: 23rd September 2021 ,