Sloshing hydrogen: Liquid organic hydrogen carriers are high-boiling organic molecules, which can be reversibly hydrogenated and dehydrogenated in catalytic processes and are, therefore, a promising chemical hydrogen storage material. One of the promising candidates is the pair N-ethylcarbazole/perhydro-N-ethylcarbazole (NEC/H₁₂-NEC). The dehydrogenation and possible side reactions on a Pt(111) surface are evaluated in unprecedented detail.
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http://dx.doi.org/10.1002/cssc.201300263 | DOI Listing |
ACS Appl Mater Interfaces
July 2024
School of Materials Science and Engineering, Peking University, Beijing 100871, China.
Dodecahydro--ethylcarbazole (12H-NEC) is regarded as the most promising liquid organic hydrogen carrier for hydrogen storage and transportation. Understanding the mechanism of 12H-NEC dehydrogenation and developing cost-effective catalysts are significant. Pd is a high-performance catalyst for 12H-NEC but is not cost-effective, and Ni is just the opposite.
View Article and Find Full Text PDFUltrason Sonochem
February 2024
National Center for International Research on Catalytic Technology, Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Material Sciences, Heilongjiang University, Harbin 150080, China. Electronic address:
Research and development of high-performance catalysts is a key technology to realize hydrogen energy storage and transportation based on liquid organic hydrogen carriers. Co/beta was prepared using beta zeolite as a carrier via an electrostatic adsorption (ESA)-chemical reduction method, and it was used as the template and reducing agent to prepare bimetallic catalysts via an ultrasonic assisted galvanic replacement process (UGR). The fabricated PdCo/beta were characterized by TEM, XPS, FT-IR, XRD, H-TPR, and H-TPD.
View Article and Find Full Text PDFInorg Chem
September 2023
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
Using Ni as a template and reductant, Ni core-Pd shell nanoparticles (Ni@Pd NPs) supported on KIT-6 (Ni@Pd/K6) were prepared by a galvanic replacement reaction under ultrasonic radiation. The characterization results show that the Ni@Pd core-shell NPs with an average diameter of 1.9 ± 0.
View Article and Find Full Text PDFUltrason Sonochem
August 2022
National Center for International Research on Catalytic Technology, Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Material Sciences, Heilongjiang University, Harbin 150080, China. Electronic address:
N-ethylcarbazole/dodecahydro-N-ethylcarbazole (NEC/H12-NEC) is a promising LOHC, and the development of a catalyst with high activity and stability is the key to realizing its reversible hydrogen storage process. In this paper, ultrafine Pd nanocrystalline catalysts (Pd/LDHs-us) supported on Cl-intercalated MgAl LDHs were prepared by a simple ultrasonic-assisted reduction method and applied in the dehydrogenation of 12H-NEC. In the process of ultrasonic-assisted reduction, the instantaneous high temperature generated by cavitation decomposed part of the CO in LDHs interlayer, and promoted PdCl to enter the interlayer and become new intercalated ions.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
July 2022
School of Chemistry and Material Science, Heilongjiang University, Harbin, 150080, China.
N-Ethylcarbazole (NEC), as a promising liquid organic hydrogen carrier (LOHC), can store and release hydrogen through a reversible catalytic hydrogenation and dehydrogenation reaction. In this paper, RuPd bimetallic nanocatalyst supported on MgAl-layered double hydroxide (RuPd/LDH) was prepared by ultrasonic-assisted reduction method, and its catalytic performance in NEC hydrogenation was also studied. Under the action of ultrasound, hydroxyl groups (-OH) on the surface of LDH support dissociated into highly reductive hydrogen radicals for the reduction of Ru and Pd to Ru and Pd.
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