Application of Laser Induced Breakdown Spectroscopy as a Novel Approach for Monitoring of the Activity of Nano Palladium Catalyst as Compared to Two Well‐known Methods

Abstract

Catalyst deactivation is an unavoidable process that occurs in catalytic chemical reactions. Laser Induced Breakdown Spectroscopy (LIBS) is used here as a novel approach to investigate the activity of palladium supported with carbon catalyst (Pd/C) over the hydrogenation of cinnamic acid with tetralin. Their outputs for four catalyst samples are reported for different time intervals of 0, 5, 10, 15 min during the reaction. The results of LIBS analysis are compared to Inductively Coupled Plasma Mass Spectrometry (ICP-MS), which

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…216 A model Cs adsorbent was prepared, crushed and coated with a nitrocellulose-based curing agent to provide a thin, at surface to facilitate stable LA sampling. A 135 Cs/ 137 Cs isotopic ratio of 0.41 AE 0.02 agreed with solution based ICP-MS, but only required <10 mg of sample. Warwick et al discussed the applications of tandem ICP-MS/MS for radionuclide measurement, outlining the exibility of the instrument setup for improved interference removal compared with alternative ICP-MS instrument designs.…”

“…An increasingly popular technique for measurement of longlived radionuclides relevant to nuclear decommissioning is ICP-MS. Asai et al employed LA-ICP-MS for the direct measurement of 135 Cs in adsorbents, which had been used for decontamination of water at the Fukushima power plant. 216 A model Cs adsorbent was prepared, crushed and coated with a nitrocellulose-based curing agent to provide a thin, at surface to facilitate stable LA sampling.…”

“…Thermal ionisation mass spectrometry was applied effectively to the low-level detection of radionuclides that are considered difficult to measure using radiometric techniques. Dion et al evaluated TIMS for isotopic Sr and Cs measurement in the presence of isobaric interferences ( 89 Y and 90 Zr for 89 Sr/ 90 Sr, and 135 Ba and 137 Ba for 135 Cs/ 137 Cs). 221 The decontamination factor for 90 Zr was $2 Â 10 8 , compared with 5 Â 10 6 and 8 Â 10 6 for 135 Ba and 137 Ba, respectively.…”

“…A LIBS method with minimal sample preparation was used as means of investigating the deactivation of Pd/C catalysts , where leaching was the main deactivation mechanism. 135 Samples were dried, milled and pressed into pellets with a palmitic acid binder. The LIBS analysis was performed using a Q-switched Nd:YAG laser at 1064 nm with a pulse duration of 7 ns under an argon blanket to reduce the effects of atmospheric gases.…”