The “electric-dipole” effect of Pt–Ni for enhanced catalytic dehydrogenation of ammonia borane

Wang, Bin; Xiong, Laifei; Hao, Hanjing; Cai, Hairui; Gao, Pengfei; Liu, Fuzhu; Yu, Xibin; Wu, Chao; Yang, Shengchun

doi:10.1016/j.jallcom.2020.156253

Cited by 16 publications

(6 citation statements)

References 44 publications

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“…Detailed reaction equations: NH 4 B(OMe) 4 + LiAlH 4 + NH 4 Cl → NH 3 BH 3 + Al(OMe) 3 + LiCl + MeOH +NH 3 +H 2 . As shown in Figure 33a, the XRD pattern of regenerated AB matches with that of pure AB, with the charac( 110), ( 101), ( 200), (002), (211), and (112). [291] This support also promotes the dehydrogenation and regeneration of AB.…”

Section: Regeneration Of Ab With Lithium Aluminum Hydridementioning

confidence: 61%

“…Therefore, the dehydrogenation of Al 2 O 3 –PtNi to AB shows higher catalytic activity than Al 2 O 3 –Pt and Al 2 O 3 –Ni. [ 211 ]…”

Section: In‐depth Discussion On Supported Catalystsmentioning

confidence: 99%

“…Therefore, the dehydrogenation of Al 2 O 3 -PtNi to AB shows higher catalytic activity than Al 2 O 3 -Pt and Al 2 O 3 -Ni. [211] The synthesis of a material consisting of Pt NPs and NiO x nanoclusters supported by single-sided TiO 2 is depicted in Fig- ure 12a. Dual-mode oxygen vacancies significantly promoted H 2 O dissociation in two ways.…”

Section: Figurementioning

confidence: 99%

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Recent Advances and Perspectives on Supported Catalysts for Heterogeneous Hydrogen Production from Ammonia Borane

et al. 2023

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Ammonia borane (AB), a liquid hydrogen storage material, has attracted increasing attention for hydrogen utilization because of its high hydrogen content. However, the slow kinetics of AB hydrolysis and the indefinite catalytic mechanism remain significant problems for its large-scale practical application. Thus, the development of efficient AB hydrolysis catalysts and the determination of their catalytic mechanisms are significant and urgent. A summary of the preparation process and structural characteristics of various supported catalysts is presented in this paper, including graphite, metal-organic frameworks (MOFs), metal oxides, carbon nitride (CN), molybdenum carbide (MoC), carbon nanotubes (CNTs), boron nitride (h-BN), zeolites, carbon dots (CDs), and metal carbide and nitride (MXene). In addition, the relationship between the electronic structure and catalytic performance is discussed to ascertain the actual active sites in the catalytic process. The mechanism of AB hydrolysis catalysis is systematically discussed, and possible catalytic paths are summarized to provide theoretical considerations for the designing of efficient AB hydrolysis catalysts. Furthermore, three methods for stimulating AB from dehydrogenation by-products and the design of possible hydrogen product-regeneration systems are summarized. Finally, the remaining challenges and future research directions for the effective development of AB catalysts are discussed.

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Section: Regeneration Of Ab With Lithium Aluminum Hydridementioning

confidence: 61%

“…Therefore, the dehydrogenation of Al 2 O 3 –PtNi to AB shows higher catalytic activity than Al 2 O 3 –Pt and Al 2 O 3 –Ni. [ 211 ]…”

Section: In‐depth Discussion On Supported Catalystsmentioning

confidence: 99%

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Recent Advances and Perspectives on Supported Catalysts for Heterogeneous Hydrogen Production from Ammonia Borane

et al. 2023

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“…[8][9][10] Various metal based catalysts including precious and nonprecious metals have been employed for hydrolysis of NH 3 BH 3 . [11][12][13][14][15][16][17][18] However, the high cost of precious metals and low activity of non-precious metals hinder the large-scale application of NH 3 BH 3 . Many efforts have been made to decrease the dosage of precious metals and enhance the activity of nonprecious metal based catalysts.…”

Section: Introductionmentioning

confidence: 99%

Hydrophilic amorphous Cr₂O₃ supported Co species toward efficient hydrogen production from ammonia borane under visible light irradiation

Wu,

Song

2023

RSC Adv.

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“…Zhang et al 24 suggested that E ext along the B–N bond axis can lead to variations in the bond length and charge transfer of AB. Wang et al 25 revealed an “electric dipole” effect generated by the Pt–Ni atoms in the catalytic dehydrogenation process of AB and proposed that the B–H bond is activated by this effect to enhance the dehydrogenation kinetics. Yu et al 26 reported that the adsorbed B–H bond over the BC 3 sheet was further elongated with E ext , which could greatly promote H 2 production.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Effect of an External Electric Field on NH₃BH₃ Dehydrogenation: an AIMD Study for Thermolysis

Huang

et al. 2022

ACS Omega

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How to improve the dehydrogenation properties of ammonia borane (AB, NH 3 BH 3 ) is always a challenge for its practical application in hydrogen storage. In this study, we reveal the enhanced effect of an external electric field ( E ext ) on AB dehydrogenation by means of the ab initio molecular dynamics method. The molecular rotation induced by an electrostatic force can facilitate the formation of the H–N···B–H framework, which would aggregate into poly-BN species and further suppress the generation of the volatile byproducts. Meanwhile, the dihydrogen bond (N–H δ+ ··· δ− H–B) is favorably formed under E ext , and the interaction between relevant H atoms is enhanced, leading to a faster H 2 liberation. Correspondingly, the apparent activation energy for AB dissociation is greatly reduced from 18.42 to around 15 kcal·mol –1 with the application of an electric field, while that for H 2 formation decreases from 20.4 to about 16 kcal·mol –1 . In the whole process, the cleavage of the B–H bond is more favorable than that of the N–H bond, no matter whether the application of E ext . Our results give a deep insight into a positive effect of an electric field on AB dehydrogenation, which would provide an important inspiration for hydrogen storage in industry applications.

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The “electric-dipole” effect of Pt–Ni for enhanced catalytic dehydrogenation of ammonia borane

Cited by 16 publications

References 44 publications

Recent Advances and Perspectives on Supported Catalysts for Heterogeneous Hydrogen Production from Ammonia Borane

Recent Advances and Perspectives on Supported Catalysts for Heterogeneous Hydrogen Production from Ammonia Borane

Hydrophilic amorphous Cr₂O₃ supported Co species toward efficient hydrogen production from ammonia borane under visible light irradiation

Enhanced Effect of an External Electric Field on NH₃BH₃ Dehydrogenation: an AIMD Study for Thermolysis

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The “electric-dipole” effect of Pt–Ni for enhanced catalytic dehydrogenation of ammonia borane

Cited by 16 publications

References 44 publications

Recent Advances and Perspectives on Supported Catalysts for Heterogeneous Hydrogen Production from Ammonia Borane

Recent Advances and Perspectives on Supported Catalysts for Heterogeneous Hydrogen Production from Ammonia Borane

Hydrophilic amorphous Cr2O3 supported Co species toward efficient hydrogen production from ammonia borane under visible light irradiation

Enhanced Effect of an External Electric Field on NH3BH3 Dehydrogenation: an AIMD Study for Thermolysis

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Product

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Hydrophilic amorphous Cr₂O₃ supported Co species toward efficient hydrogen production from ammonia borane under visible light irradiation

Enhanced Effect of an External Electric Field on NH₃BH₃ Dehydrogenation: an AIMD Study for Thermolysis