Non-thermal plasma-assisted catalytic CO 2 conversion over Zn-TCPP 2D catalyst
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Non‑thermal plasma‑assisted catalytic CO2 conversion over Zn‑TCPP 2D catalyst Marek Wiśniewski1 · Artur P. Terzyk1 Received: 3 September 2019 / Revised: 29 January 2020 / Accepted: 13 March 2020 © The Author(s) 2020
Abstract There is still a growing interest in C O2 conversion into useful compounds. Plasma technology is a highly promising alternative due to its non-equilibrium nature, crucial for C O2 dissociation processes. In this study we present, the non-thermal plasma-assisted catalytic CO2 reduction to CO on 2D Zn-containing paddle wheel structures based on TCPP. The catalytic efficiency of this MOF material is shown to be high. The experimental data from HRTEM, adsorption and FTIR analyses lead to the simplified model mechanism of this process. Keywords CO2 adsorption · CO2 reduction · Non-thermal plasma · 2D-materials · Zn-TCPP
1 Introduction Increasing concerns about CO2 emission issues call for the development of new clean sustainable technologies. Therefore, CO2 splitting has attracted a great attention over the past years within the fields of environmental sciences (Snoeckx and Bogaerts 2017; Bennett et al. 2017). The technologies using solar derived systems and/or cold plasma, without requirement for high pressures and/or temperatures, powering the conversion of C O2 to chemical fuels are nowadays of decisive importance to address energy and environmental demands. (Shi et al. 2019; Alliati et al. 2018). The significant drawback in CO2 conversion is the fact that, it is a highly stable molecule with ΔG° = − 394 kJ/mol. Its dissociation is strongly endothermic (ΔH° = + 280 kJ/ mol) (Alliati et al. 2018) causing that high conversions in splitting reaction are not easy to achieve. Many research efforts have aimed to overcome these difficulties, among which plasma processing, and especially, plasma-assisted catalytic processes are presented as a promising alternative approaches thanks to their non-equilibrium nature. However, the design and synthesis of suitable materials able to
* Marek Wiśniewski [email protected] 1
Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Toruń, Gagarin Street 7, 87‑100, Toruń, Poland
effectively remove C O2 from a gas stream is still a great challenge (Snoeckx and Bogaerts 2017). The favorable catalysts for C O2 effective splitting need to meet the following requirements: (i) excellent CO2 adsorption ability at broad temperature range; (ii) high thermal stability; (iii) sufficient ability for O* scavenging; (iv) low reactivity, especially in oxidizing environment. These supplies are extensively fulfilled by two-dimensional (2D) Zn-containing paddle wheel structures based on TCPP (tetrakis(4-carboxyphenyl)porphyrin). These semiconductor materials have been extensively investigated and applied in photocatalytic processes, including water splitting and C O2 reduction as a heterogeneous photocatalyst under visible light (Amayuelas et al. 2017). For example, some porphyrin-containing MOFs structures h
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