Highly efficient polymer supported monodisperse ruthenium-nickel nanocomposites for dehydrocoupling of dimethylamine borane
Authors: Aysun Şavk
Esra Kuyuldar
Buse Demirkan
Tugba Onal Okyay
Betul Sen
Fatih Sen
Journal: Journal of Colloid and Interface Science (2018)
Discipline: CHEMISTRY
Keywords: Dehydrogeneration; Dimethylamine-borane; Metal-nanocatalyst; Polymer supported.
Affiliations: Sen Research Group, Biochemistry Department, Faculty of Arts and Science, Dumlupinar University, Evliya Celebi Campus, 43100 Kutahya, Turkey., Sen Research Group, Biochemistry Department, Faculty of Arts and Science, Dumlupinar University, Evliya Celebi Campus, 43100 Kutahya, Turkey; Department of Chemical Engineering, Faculty of Engineering, Usak University, Usak, Turkey., Sen Research Group, Biochemistry Department, Faculty of Arts and Science, Dumlupinar University, Evliya Celebi Campus, 43100 Kutahya, Turkey. Electronic address: .

Abstract:  In the present study, highly effective and reusable monodisperse ruthenium-nickel (Ru-Ni) nanomaterials supported on poly(N-vinyl-2-pyrrolidone) (Ru-Ni@PVP) were synthesized (3.51 ± 0.38 nm) by a facile sodium-hydroxide-assisted reduction method; Ru and Ni reduction in PVP solution was accomplished. The prepared nanocomposites were characterized by TEM, HRTEM, XRD, and XPS and performed as a catalyst for dehydrocoupling of dimethylamine-borane (DMAB). It was found that Ru-Ni nanomaterials are one of the most active catalysts at low concentrations and temperature for dehydrocoupling of DMAB. This catalyst with its turnover frequency of 458.57 h-1 exhibits one of the best results among all the catalysts prepared in the literature for dehydrocoupling of DMAB. Significantly low Ea value (36.52 ± 3 kJ mol-1) was also found for dehydrocoupling of DMAB. 

Retracted: No

PubPeer comments:
 This paper is one of at least 30 papers by the same research group that all share the same photo. In all papers, this photo is used as a zoomed-in inset representing the 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. Here is a collage of 6 different uses of the same photo,  Inset 1 : ![file] Here is a list of the 30 papers identified so far that all use this photo, and the different types of nanoparticles that they represent. * Aysenur Aygun et al. - DOI: 10.1016 j.jpba.2019.112961 - Nigella sativa Pt * Aysun Su0327avk et al. - DOI: 10.1016 j.molliq.2019.112355 - PtNi@AC * Aysun Su0327avk et al. - DOI: 10.1016 j.msec.2019.01.113 - ZnNi@f-MWCNT * Aysun Su0327avk et al. - DOI: 10.1038 s41598-019-55746-y - PdNi@rGO * Betuu0308l Su0327en et al. - DOI: 10.1016 j.ijhydene.2018.03.175 - Pd@GO * Betuu0308l Su0327en et al. - DOI: 10.1016 j.nanoso.2017.08.013 - PdRu@GO * Betuu0308l Su0327en et al. - DOI: 10.1016 j.apcatb.2017.11.067 - RhPt TC@GO * Betuu0308l Su0327en et al. - DOI: 10.1016 j.ijhydene.2018.07.081 - Pd-Ir@AC * Betuu0308l Su0327en et al. - DOI: 10.1016 j.jcis.2018.05.021 - Ru-Ni@PVP * Betuu0308l Su0327en et al. - DOI: 10.1016 j.nanoso.2018.07.008 - Pd@AC * Betuu0308l Su0327en et al. - DOI: 10.1016 j.ijhydene.2018.07.122 - PdRuNi@GO * Betuu0308l Su0327en et al. - DOI: 10.1016 j.ijhydene.2019.01.215 - PdCo@GO * Betuu0308l Su0327en et al. - DOI: 10.1016 j.jtice.2019.04.040 - PdNi@VC * Betuu0308l Su0327en et al. - DOI: 10.1016 j.ijhydene.2018.12.051 - PdCo@MOF * Betuu0308l Su0327en et al. - DOI: 10.1016 j.ijhydene.2019.02.176 - RuCu@rGO * Birguu0308tay Su0327ahin et al. - DOI: 10.1016 j.colsurfb.2017.12.042 - Pt * Buse Demirkan et al. - DOI: 10.1038 s41598-020-59935-y - rGO Pd@PPy * Buse Demirkan et al. - DOI: 10.1038 s41598-019-48802-0 - Pt-Co@rGO * Fatma Diler et al. - DOI: 10.1016 j.molliq.2019.111967 - Pd@GO * Hayriye Genc Bilgicli et al. - DOI: 10.1016 j.micromeso.2020.110014 - CPG * Hilal Acidereli et al. - DOI: 10.1016 j.renene.2020.07.105 - PdRu@G * Mehmet Salih Nas et al. - DOI: 10.1016 j.molliq.2019.112100 - Pt-Co@GO * Nabih Lolak et al. - DOI: 10.1021 acsomega.9b00485 - PdNi@GO * Oznur Alptekin et al. - DOI: 10.1039 D0CY00641F - PtRh@GO * Rukiye Ayranci et al. - DOI: 10.1016 j.msec.2019.02.040 - Pt Ni@rGO * Sait Bozkurt et al. - DOI: 10.1016 j.aca.2017.07.051 - Pd TNM@rGO * Sinan Eris et al. - DOI: 10.1016 j.jcis.2017.11.085 - Pt@f-CB * Sinan Eris et al. - DOI: 10.1016 j.ijhydene.2017.11.063 - Pt@f-VC * Suat Tacu0327yu0131ldu0131z et al. - DOI: 10.1016 j.molliq.2019.04.019 - Ru-Rh@PVP * Zeynep Dasu0327delen et al. - DOI: 10.1016 j.apcatb.2017.08.014 - Pt@GO-PVP Here is Figure 1 of this paper: ![file] , 
 Fig. 2. XRD of PVP, Ru@PVP, Ni@PVP, and Ruu2013Ni@PVP nanoparticles. ![file] Here we see one XRD pattern which was modified into three using a) removing peaks as background b) adding broad feature For clarity two fragments framed. Noise for PVP and Ni@PVP is mostly identical except for regions with peaks added to PVP pattern (or removed from Ni@PVP). Ru@PVP has some broad peak added but the noise is the same as in PVP curve ![file] , 
 XPS spectrum for Ru is the same as in at least 3 other papers, see here: https: pubpeer.com publications B282E7A473AEB2520B3C7B49336281 ![file] ,