scholarly journals Pd-C Catalytic Thin Films Prepared by Magnetron Sputtering for the Decomposition of Formic Acid

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2326
Author(s):  
Gisela Mariana Arzac ◽  
Asunción Fernández ◽  
Vanda Godinho ◽  
Dirk Hufschmidt ◽  
Maria Carmen Jiménez de Haro ◽  
...  

Formic acid is an advantageous liquid organic hydrogen carrier. It is relatively nontoxic and can be synthesized by the reaction of CO2 with sustainable hydrogen or by biomass decomposition. As an alternative to more widely studied powdery catalysts, supported Pd-C catalytic thin films with controlled nanostructure and compositions were newly prepared in this work by magnetron sputtering on structured supports and tested for the formic acid decomposition reaction. A two-magnetron configuration (carbon and tailored Pd-C targets) was used to achieve a reduction in Pd consumption and high catalyst surface roughness and dispersion by increasing the carbon content. Activity and durability tests were carried out for the gas phase formic acid decomposition reaction on SiC foam monoliths coated with the Pd-C films and the effects of column width, surface roughness and thermal pre-reduction time were investigated. Activity of 5.04 molH2·gPd−1·h−1 and 92% selectivity to the dehydrogenation reaction were achieved at 300 °C for the catalyst with a lower column width and higher carbon content and surface roughness. It was also found that deactivation occurs when Pd is sintered due to the elimination of carbon and/or the segregation and agglomeration of Pd upon cycling. Magnetron sputtering deposition appears as a promising and scalable route for the one-step preparation of Pd-C catalytic films by overcoming the different deposition characteristics of Pd and C with an appropriate experimental design.

Author(s):  
Marco Santucci ◽  
Maria Laura Ermini ◽  
Giulio Bresciani ◽  
Andrea Griesi ◽  
Mauro Gemmi ◽  
...  

AbstractCatalysts are involved in a number of established and emerging chemical processes as well as in environmental remediation and energy conversion. Nanoparticles (NPs) can offer several advantages over some conventional catalysts, such as higher efficiency and selectivity. Nowadays, versatile and scalable nanocatalysts that combine activity and stability are still lacking. Here, we report a comprehensive investigation on the production and characterization of hybrid nano-architectures bringing a partial or total bare surface together with their catalytic efficiency evaluation on, as a proof-of-concept, the formic acid decomposition reaction. In this regard, formic acid (FA) is a convenient and safe hydrogen carrier with appealing features for mobile applications, fuel cells technologies, petrochemical processes and energetic applications. Thus, the design of robust catalysts for FA dehydrogenation is strongly demanded. Due to this, we produced and evaluated nano-architectures with various equilibrium between the size-increase of the active part and the barer catalytic surface. Overall, this work paves the way for the development of new approaches for green energy storage and safe delivery.


2021 ◽  
Vol 45 ◽  
pp. 101078
Author(s):  
Samuel Eshorame Sanni ◽  
Peter Adeniyi Alaba ◽  
Emeka Okoro ◽  
Moses Emetere ◽  
Babalola Oni ◽  
...  

2021 ◽  
Author(s):  
Javier Ivanez ◽  
Patricia Garcia-Munoz ◽  
Agnieszka M. Ruppert ◽  
Nicolas Keller

ChemCatChem ◽  
2021 ◽  
Author(s):  
Alberto Villa ◽  
Ilaria Barlocco ◽  
Sofia Capelli ◽  
Xiuyuan Lu ◽  
Silvio Bellomi ◽  
...  

ACS Catalysis ◽  
2015 ◽  
Vol 5 (8) ◽  
pp. 4772-4782 ◽  
Author(s):  
Manasa Sridhar ◽  
Davide Ferri ◽  
Martin Elsener ◽  
Jeroen Anton van Bokhoven ◽  
Oliver Kröcher

Author(s):  
Axel Kosider ◽  
Dominik Blaumeiser ◽  
Simon Schoetz ◽  
Patrick Preuster ◽  
Andreas Bösmann ◽  
...  

Formic acid decomposition (FAD) generates H2 at low temperatures. However, many known catalyst systems suffer from deactivation due to competing side reactions during FAD. In this work, we focus on...


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