Ti3AlC2/Pd Composites for Efficient Hydrogen Production from Alkaline Formaldehyde Solutions

Abstract

Research on catalytic oxidation in a promising but mild manner to remove formaldehyde and produce hydrogen is rarely reported. Here, the use of the Ti3AlC2 MAX phase as support for palladium nanoparticles was explored for the hydrogen generation from alkaline formaldehyde solution at room temperature. The results showed that Ti3AlC2/Pd catalyst with 3 wt% Pd loading had a much higher capability for hydrogen production than conventional Pd nanoparticles. In addition, by further optimizing the formaldehyde concentration, NaOH concentration, and the reaction temperature, the hydrogen production rate could be further increased to 291.6 mL min−1g−1. Moreover, the obtained apparent activation energy of the Ti3AlC2/Pd catalyzed hydrogen production reaction is 39.48 kJ mol−1, which is much lower than that of the literature results (65 kJ mol−1). The prepared Ti3AlC2/Pd catalysts as well as the catalytic process could act as a “two birds with one stone” effect, that is, they not only eliminate noxious formaldehyde but also generate clean hydrogen.

Computational design of novel MAX phase alloys as potential hydrogen storage media combining first principles and cluster expansion methods

“…11 Liu et al showed that the Ti 3 AlC 2 /Pd catalyst with 3 wt% Pd loading has a much higher capacity for hydrogen production than conventional Pd nanoparticles. 12 MAX phases behave as a support structure for palladium nanoparticles for hydrogen generation from an alkaline formaldehyde solution at room temperature. The layered structures of the MAX phase can also be useful in the hydrogen storage field.…”

Recent Breakthroughs and Future Potential of Inorganic Nanocomposites in Hydrogen Generation

“…Liu and coworkers demonstrated that catalytic oxidation and toxic HCHO (formaldehyde) exhibit a higher clean H 2 evolution rate owing to the support of Pd NPs at 3 wt% loadings. Subsequently, enhanced temperature conditions and higher concentrations of analytes indicate best results up to 291.6 mL/min/g (rate of hydrogen synthesis), showing a lower E a (39.48 kJ mol −1 ) than the literature (65 kJ/mol) [117] …”

“…Subsequently, enhanced temperature conditions and higher concentrations of analytes indicate best results up to 291.6 mL/min/g (rate of hydrogen synthesis), showing a lower E a (39.48 kJ mol À 1 ) than the literature (65 kJ/mol). [117] Similarly, Jafarpour and coworkers designed a PdÀ C 3 N 4imine/TiO 2 photocatalyst approachable at visible light to sustain olefin hydrogenation under the nanoscopic class that results in energy alterations. In this work, Pd NPs dispersed over g-C 3 N 4imine-functionalized TiO 2 exhibit superior stability.…”

Highly Active Palladium-Decorated Reduced Graphene Oxides for Heterogeneous Catalysis and Electrocatalysis: Hydrogen Production from Formaldehyde and Electrochemical Formaldehyde Detection

“…Although it achieves a relatively higher H 2 production rate of 778 mmol/(g·h), the high price of used catalysts rendered its further application disadvantageous and made it less competitive. Our previous studies also suggested that Pd nanoparticles (NPs) supported on Fe 2 O 3 nanoplate, 3D hierarchical porous carbon, and Ti 3 AlC 2 MAX phase could serve as highly efficient catalysts to produce H 2 from aqueous formaldehyde solution [ 16 , 17 , 18 ]. In addition, Pd NPs supported on metal oxide, such as ZnO nanoroads and TiO 2 nanosheets exposed with (001) facets, realizes efficient H 2 production from formaldehyde solution [ 19 , 20 ].…”