Synthesis of bifunctional Ru–Pd catalysts following a double reduction method: hydrogenation/dehydrogenation of liquid organic hydrogen carriers

Zhu, Ting; Wang, Ran; Chen, Ziteng; Feng, Jing; Dong, Yuan; Yang, Ming

doi:10.1039/d2cy00425a

Cited by 6 publications

(1 citation statement)

References 65 publications

(72 reference statements)

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“…The commercialization of LOHC-based hydrogen storage technology has the potential to realize hydrogen storage and transportation with high efficiency and high safety. To achieve large-scale commercialization of LOHC, it is necessary to address two main issues, namely, mild thermodynamics and rapid kinetics in hydrogenation and dehydrogenation reactions. − The development of LOHC-based hydrogen carriers can be traced back to the early 2000s, with the initial investigations focusing on the use of LOHCs such as N -ethylcarbazole − and methylcyclohexane. , In recent years, many efforts have been made to develop new LOHC molecules such as N -propylcarbazole, ,,− indoles, − quinolines, − acridine, and dibenzyltoluene − with improved hydrogen storage capacity and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Identifying Noble Metal Catalysts for the Hydrogenation and Dehydrogenation of Dibenzyltoluene: A Combined Theoretical–Experimental Study

Liu,

Zhu,

Xia

et al. 2023

Inorg. Chem.

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We present a comprehensive theoretical and experimental investigation of the hydrogenation and dehydrogenation of dibenzyltoluene (DBT) using Pd-, Pt-, Ru-, and Rh-supported metal catalysts to identify the optimal catalysts for hydrogen storage and release processes. Our results demonstrated significant variation in the catalytic activity of the metal catalysts. 5 wt % Rh/Al 2 O 3 and 5 wt % Pt/Al 2 O 3 showed the highest activity for hydrogenation and dehydrogenation with the highest selectivity and turnover frequency (TOF), respectively. Conversely, 5 wt % Pd/Al 2 O 3 and 5 wt % Ru/Al 2 O 3 exhibited lower catalytic activity toward full hydrogenation and dehydrogenation. Rh/Al 2 O 3 showed the best catalytic hydrogenation activity with a TOF of 26.49 h −1 and a hydrogenation degree of 92.69% in 2 h, while Pt/Al 2 O 3 exhibited the best catalytic dehydrogenation activity with a released H 2 volume of 3755 mL, a dehydrogenation degree of 78.23%, and a TOF of 39.56 h −1 in 2 h. Additionally, we estimated the activation energies for hydrogenation and dehydrogenation to be 67.20 and 82.78 kJ/mol, respectively. Notably, the produced hydrogen gas was of high purity and suitable for use in fuel cells. Density functional theory (DFT) calculations were used to analyze the adsorption structure and reaction energy changes of all intermediate products of DBT on the surface of the chosen catalysts. Our research provides valuable insights into developing efficient catalysts for liquid organic hydrogen carriers.

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Section: Introductionmentioning

confidence: 99%

Identifying Noble Metal Catalysts for the Hydrogenation and Dehydrogenation of Dibenzyltoluene: A Combined Theoretical–Experimental Study

Liu,

Zhu,

Xia

et al. 2023

Inorg. Chem.

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Bridging Dehydrogenation and Hydrogenation in Heterogeneous Catalysis: A Demonstration of a Unified Catalytic Approach

Jangir,

Jagirdar

2024

Chemistry A European J

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In the pursuit of enhancing the applications of hydrogen as an energy carrier, this research delved into the utilization of a singular hybrid catalyst capable of performing both dehydrogenation and hydrogenation processes for Liquid Organic Hydrogen Carriers (LOHCs). This study presents the synthesis and characterization of a hybrid catalyst, combining an organometallic pincer complex with Pd‐Ru heterostructures supported on γ‐alumina. Unlike conventional transition and noble metal nanoparticles, the use of a pincer complex offers exceptional thermal stability due to its aryl backbone, which is advantageous for various endothermic dehydrogenation reactions of hydrocarbons in LOHCs. This pioneering hybrid catalyst is a novel approach, demonstrating a proof of concept. In this study, we utilized the hybrid catalyst to investigate the dehydrogenation and hydrogenation of a lower enthalpic system, specifically the cyclooctane‐cyclooctene system. The dehydrogenation of cyclooctane was conducted at 443 K using tertiary butyl ethylene as a sacrificial hydrogen acceptor, while the hydrogenation of cyclooctene reaction catalyzed by Pd‐Ru nanostructures occurred at 298 K and 1 atm H2. The results showed successful tandem dehydrogenation‐hydrogenation reactions. However, challenges were noted in terms of catalytic activity and recyclability, providing valuable insights for further refinement and optimization.

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Nitrogen-doped carbon supported PtPd alloy nanoparticles exhibiting high catalytic activity for cyclohexane dehydrogenation under low temperatures

Wang

Shi

Wang

et al. 2023

Fuel

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Synthesis of bifunctional Ru–Pd catalysts following a double reduction method: hydrogenation/dehydrogenation of liquid organic hydrogen carriers

Abstract: Catalytic hydrogenation and dehydrogenation of liquid organic hydrogen carriers (LOHCs) have attracted immense attention as this is the most attractive strategy for the storage and release of hydrogen. Heterogeneous catalysts...

Cited by 6 publications

References 65 publications

Identifying Noble Metal Catalysts for the Hydrogenation and Dehydrogenation of Dibenzyltoluene: A Combined Theoretical–Experimental Study

Identifying Noble Metal Catalysts for the Hydrogenation and Dehydrogenation of Dibenzyltoluene: A Combined Theoretical–Experimental Study

Bridging Dehydrogenation and Hydrogenation in Heterogeneous Catalysis: A Demonstration of a Unified Catalytic Approach

Nitrogen-doped carbon supported PtPd alloy nanoparticles exhibiting high catalytic activity for cyclohexane dehydrogenation under low temperatures

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