Recent advances in liquid-phase chemical hydrogen storage

Lang, Chengguang; Jia, Yi; Yao, Xiangdong

doi:10.1016/j.ensm.2020.01.010

Cited by 196 publications

(82 citation statements)

References 326 publications

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“…However, these results were achieved at a moderate conversion of MCH (25-30%). Moreover, such nickel-based catalysts were noted to be less active compared to Pt [2,26]. Bearing all this in mind, the development of nickel-based catalysts with high nickel loading and modification by other metals might be an option for effective use in the dehydrogenation process.…”

Section: Introductionmentioning

confidence: 99%

High-Loaded Nickel Based Sol–Gel Catalysts for Methylcyclohexane Dehydrogenation

et al. 2020

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Application of liquid organic hydrogen carriers, such as “methylcyclohexane (MCH)–toluene” chemical couple, is one of the promising approaches for hydrogen storage and transportation. In the present study, copper-modified nickel catalysts with high metal loading of 75 wt% were synthesized via heterophase sol–gel technique, and investigated in the dehydrogenation of MCH. Two approaches towards the copper introduction were applied. The catalyst samples prepared via wetness impregnation of the nickel sol–gel catalyst are characterized by more effective Ni-Cu interaction compared to those where two metals were introduced simultaneously by the mixing of their solid precursors. As a result, the “impregnated” catalysts revealed higher selectivity towards toluene. The addition of copper up to 30 wt% of total metal content was shown to increase significantly toluene selectivity and yield without a noticeable decrease in MCH conversion. The catalyst with the active component including 80 wt% of Ni and 20 wt% of Cu demonstrated 96% and 89% toluene selectivity at 40% and 80% MCH conversion, respectively. Based on the obtained data, this non-noble catalytic system appears quite promising for the MCH dehydrogenation.

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Section: Introductionmentioning

confidence: 99%

High-Loaded Nickel Based Sol–Gel Catalysts for Methylcyclohexane Dehydrogenation

et al. 2020

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“…A lot of effort has been devoted to developing hydrogen storage materials, including physical and chemical storage systems, with excellent performance. Ammonia borane (AB), a stable solid in normal conditions with a hydrogen content of 19.6 wt %, was thought to be a potential chemical hydrogen storage material and has gained the attention of many scientists [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. The AB could release 3 mol H 2 per mole AB at mild conditions in the presence of an appropriate catalyst.…”

Section: Introductionmentioning

confidence: 99%

Cu@Pd/C with Controllable Pd Dispersion as a Highly Efficient Catalyst for Hydrogen Evolution from Ammonia Borane

et al. 2020

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A series of Cu@Pd/C with different Pd contents was prepared using the galvanic reduction method to disperse Pd on the surface of Cu nanoparticles on Cu/C. The dispersion of Pd was regulated by the Cu(I) on the surface, which was introduced by pulse oxidation. The Cu2O did not react during the galvanic reduction process and restricted the Pd atoms to a specific area. The pulse oxidation method was demonstrated to be an effective process to control the oxidization degree of Cu on Cu/C and then to govern the dispersion of Pd. The catalysts were characterized by transmission electron microscopy (TEM), high-resolution transmission electron microscope (HRTEM), high angular annular dark field scanning TEM (HAADF-STEM), energy-dispersive spectroscopy (EDS) mapping, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), auger electron spectroscopy (AES), and inductively coupled plasma optical emission spectrometer (ICP-OES), which were used to catalyze the hydrogen evolution from ammonia borane. The Cu@Pd/C had much higher activity than the PdCu/C, which was prepared by the impregnation method. The TOF increased as the Cu2O in Cu/C used for the preparation of Cu@Pd/C increased, and the maximum TOF was 465 molH2 min−1 molPd−1 at 298 K on Cu@Pd0.5/C-640 (0.5 wt % of Pd, 640 mL of air was pulsed during the preparation of Cu/C-640). The activity could be maintained in five continuous processes, showing the strong stability of the catalysts.

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“…Moreover, the formation of a coherent passive layer deposited on the surface of bulks may prevent further oxidation of hydrolysable materials. With respect to borohydrides, NaBH 4 , an example of the family of borohydrides, is a well-known hydrogen carrier due to its high hydrogen-storage capacity (10.8 wt%) [ 32 , 33 ]. It is easily dissolved in alkaline aqueous solution for safe, stable and long periods of storage, leading to a highly convenient transportation.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production via Hydrolysis and Alcoholysis of Light Metal-Based Materials: A Review

et al. 2021

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As an environmentally friendly and high-density energy carrier, hydrogen has been recognized as one of the ideal alternatives for fossil fuels. One of the major challenges faced by “hydrogen economy” is the development of efficient, low-cost, safe and selective hydrogen generation from chemical storage materials. In this review, we summarize the recent advances in hydrogen production via hydrolysis and alcoholysis of light-metal-based materials, such as borohydrides, Mg-based and Al-based materials, and the highly efficient regeneration of borohydrides. Unfortunately, most of these hydrolysable materials are still plagued by sluggish kinetics and low hydrogen yield. While a number of strategies including catalysis, alloying, solution modification, and ball milling have been developed to overcome these drawbacks, the high costs required for the “one-pass” utilization of hydrolysis/alcoholysis systems have ultimately made these techniques almost impossible for practical large-scale applications. Therefore, it is imperative to develop low-cost material systems based on abundant resources and effective recycling technologies of spent fuels for efficient transport, production and storage of hydrogen in a fuel cell-based hydrogen economy.

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Recent advances in liquid-phase chemical hydrogen storage

Cited by 196 publications

References 326 publications

High-Loaded Nickel Based Sol–Gel Catalysts for Methylcyclohexane Dehydrogenation

High-Loaded Nickel Based Sol–Gel Catalysts for Methylcyclohexane Dehydrogenation

Cu@Pd/C with Controllable Pd Dispersion as a Highly Efficient Catalyst for Hydrogen Evolution from Ammonia Borane

Hydrogen Production via Hydrolysis and Alcoholysis of Light Metal-Based Materials: A Review

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