Engineering Iron–Nickel Nanoparticles for Magnetically Induced CO2 Methanation in Continuous Flow. Issue 15 (19th February 2020)

• Record Type: Journal Article
• Authors: De Masi, Déborah; Asensio, Juan M.; Fazzini, Pier‐Francesco; Lacroix, Lise‐Marie; Chaudret, Bruno
• Is Part Of: Angewandte Chemie international edition. Volume 59:Issue 15(2020)
• Page Start: 6187
• Page End: 6191
• Publication Date: 2020-02-19
• Subjects: CO2 methanation -- heterogeneous catalysis -- iron–nickel -- magnetic properties -- nanoparticles; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201913865
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Induction heating of magnetic nanoparticles (NPs) is a method to activate heterogeneous catalytic reactions. It requires nano‐objects displaying high heating power and excellent catalytic activity. Here, using a surface engineering approach, bimetallic NPs are used for magnetically induced CO2 methanation, acting both as heating agent and catalyst. The organometallic synthesis of Fe30 Ni70 NPs displaying high heating powers at low magnetic field amplitudes is described. The NPs are active but only slightly selective for CH4 after deposition on SiRAlOx owing to an iron‐rich shell (25 mL min −1, 25 mT, 300 kHz, conversion 71 %, methane selectivity 65 %). Proper surface engineering consisting of depositing a thin Ni layer leads to Fe30 Ni70 @Ni NPs displaying a very high activity for CO2 hydrogenation and a full selectivity. A quantitative yield in methane is obtained at low magnetic field and mild conditions (25 mL min −1, 19 mT, 300 kHz, conversion 100 %, methane selectivity 100 %). Abstract : Bimetallic Fe30 Ni70 NPs were used as heating agent and catalysts for magnetically induced CO2 . Upon deposition of Ni onto the NPs surface, full CO2 conversion into CH4 at low magnetic field was achieved.