Synergistic Effect of CeF3 Nanoparticles Supported on Ti3C2 MXene for Catalyzing Hydrogen Storage of NaAlH4

Yuan, Zhenluo; Zhang, Dafeng; Fan, Guangyin; Chen, Yumei; Fan, Yanping; Liu, Bao-Zhong

doi:10.1021/acsaem.1c00122

Cited by 38 publications

(10 citation statements)

References 57 publications

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“…In this respect, Bogdanović and Schwickardi contributed an important breakthrough by introducing a few millimoles of Ti(OBu) 4 or TiCl 3 into NaAlH 4 , which enabled reversible hydrogen storage with NaAlH 4 at moderate conditions [15]. After that, a variety of Ti-based species have been explored and evaluated, including halides, oxides, nitrides, borides, carbides, hydrides, alloys, and elemental metals (Figure 1) [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. In most cases, the Ti-species tends to react with NaAlH 4 to form Ti x Al y , which shows significant catalytic effect on the de-/rehydrogenation.…”

Section: Introductionmentioning

confidence: 99%

Titanium Hydride Nanoplates Enable 5 wt% of Reversible Hydrogen Storage by Sodium Alanate below 80°C

Ren

Zhang

et al. 2021

Research

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Sodium alanate (NaAlH4) with 5.6 wt% of hydrogen capacity suffers seriously from the sluggish kinetics for reversible hydrogen storage. Ti-based dopants such as TiCl4, TiCl3, TiF3, and TiO2 are prominent in enhancing the dehydrogenation kinetics and hence reducing the operation temperature. The tradeoff, however, is a considerable decrease of the reversible hydrogen capacity, which largely lowers the practical value of NaAlH4. Here, we successfully synthesized a new Ti-dopant, i.e., TiH2 as nanoplates with ~50 nm in lateral size and ~15 nm in thickness by an ultrasound-driven metathesis reaction between TiCl4 and LiH in THF with graphene as supports (denoted as NP-TiH2@G). Doping of 7 wt% NP-TiH2@G enables a full dehydrogenation of NaAlH4 at 80°C and rehydrogenation at 30°C under 100 atm H2 with a reversible hydrogen capacity of 5 wt%, superior to all literature results reported so far. This indicates that nanostructured TiH2 is much more effective than Ti-dopants in improving the hydrogen storage performance of NaAlH4. Our finding not only pushes the practical application of NaAlH4 forward greatly but also opens up new opportunities to tailor the kinetics with the minimal capacity loss.

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Section: Introductionmentioning

confidence: 99%

Titanium Hydride Nanoplates Enable 5 wt% of Reversible Hydrogen Storage by Sodium Alanate below 80°C

Ren

Zhang

et al. 2021

Research

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“…As observed, the Ti 3 AlC 2 peaks were replaced by Ti 3 C 2 . After alkalization, the (002) peak of Ti 3 C 2 further shifted 1.7° toward the low angle direction, suggesting that the intercalation of OH – resulted in increased spacing between the Ti 3 C 2 layers . The Pd diffraction faint peaks at 40.1° further suggest that the Pd NPs are super small.…”

Section: Resultsmentioning

confidence: 95%

Ensemble-Exciting Effect in Pd/alk-Ti₃C₂ on the Activity for Efficient Hydrogen Production

Feng

Guan

Bian

et al. 2021

ACS Sustainable Chem. Eng.

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Creating active sites to improve the mass activity and durability of metal catalysts by elucidating the relationship between the metal and the support is a major challenge. In this study, ultrafine palladium nanoparticles (Pd NPs) were supported on alkalized Ti3C2 (alk-Ti3C2) to obtain a catalytically active interfacial ensemble. The catalyst Pd/alk-Ti3C2 with a Pd loading of 1.0 wt % exhibited the highest activity in ammonia borane (AB) hydrolysis reaction, with an initial turnover frequency of 230.6 min–1. A comprehensive analysis revealed that an ensemble-exciting effect originated from the Pd and the alk-Ti3C2. The hydroxylation of alk-Ti3C2 regulated the local coordination environment of Pd. Water and AB were effortlessly activated by the −OH group and Pd atom aggregates composed of electron-deficient support alk-Ti3C2 and electron-rich Pd, respectively. The efficient generation of hydrogen at the interface of Pd/alk-Ti3C2 was further guaranteed by the interfacial activation. This work on precision active sites opens new avenues for developing high-activity noble-metal catalysts for AB hydrolysis.

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“…The PXRD pattern of Co–Ni 3 N/CeF 3 is given in Figure a. The peaks positioned at 24.5, 25.01, 27.8, 35.2, 44.1, 45.1, 51.07, 52.9, 64.8, 68.8, 69.8, and 71.2° correspond to (002), (110), (111), (112), (300), (113), (302), (221), (214), (304), (115), and (411) crystal planes of hexagonal CeF 3 . , The other peaks centered at 38.9, 42.0, 44.4, 58.5, 70.6, and 78.4° correspond to (110), (002), (200), (112), (300), and (113) crystal planes of hexagonal Ni 3 N. , The PXRD pattern of Co–Ni 3 N and Co–Ni(OH) 2 /CeF 3 phases is provided in the Supporting Information, Figure S1. XPS was used to investigate the valence states and electronic redistribution between Co–Ni 3 N and CeF 3 in Co–Ni 3 N/CeF 3 .…”

Section: Resultsmentioning

confidence: 99%

Electronegativity-Induced Valence State Augmentation of Ni and Co through Electronic Redistribution between Co-Ni₃N/CeF₃ Interfaces for Oxygen Evolution Reaction

Gaur¹,

John²,

Pundir³

et al. 2023

ACS Appl. Energy Mater.

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The development of high-performance and inexpensive electrocatalysts for the oxygen evolution reaction is one of the most desired objectives in energy conversion reactions. Due to sluggish reaction kinetics, the commercialization of such processes could not be achieved yet. Choosing an appropriate coupling interface to boost the catalyst performance is essential for the creation of high-efficiency electrocatalysts. Herein, metal-nitride and metal-fluoride heterostructures are reported with an extremely low overpotential of 180 mV at a current density of 10 mA cm −2 for OER application. The Co−Ni 3 N/CeF 3 catalyst shows strong interfacial interaction, causing significant electronic redistribution between Co−Ni 3 N and CeF 3 phases. X-ray photoelectron spectroscopy studies reveal the charge transfer from the Co−Ni 3 N to the CeF 3 phase, resulting in the augmentation in the valence states of Co and Ni and making them highly active sites for the adsorption of intermediates (O*, OH*, and HOO*). This phenomenon is possibly driven by the high polarity of CeF 3 due to the presence of highly electronegative F atoms. The stability study of the catalyst was performed for 120 h at large current densities of 100 and 200 mA cm −2 . The detailed analysis of the surface reconstruction of Co−Ni 3 N/CeF 3 is also carried out after a long-term stability test. This work offers a fresh look at the possibilities of the design and fabrication of an efficient and low-cost catalyst.

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Synergistic Effect of CeF₃ Nanoparticles Supported on Ti₃C₂ MXene for Catalyzing Hydrogen Storage of NaAlH₄

Cited by 38 publications

References 57 publications

Titanium Hydride Nanoplates Enable 5 wt% of Reversible Hydrogen Storage by Sodium Alanate below 80°C

Titanium Hydride Nanoplates Enable 5 wt% of Reversible Hydrogen Storage by Sodium Alanate below 80°C

Ensemble-Exciting Effect in Pd/alk-Ti₃C₂ on the Activity for Efficient Hydrogen Production

Electronegativity-Induced Valence State Augmentation of Ni and Co through Electronic Redistribution between Co-Ni₃N/CeF₃ Interfaces for Oxygen Evolution Reaction

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Synergistic Effect of CeF3 Nanoparticles Supported on Ti3C2 MXene for Catalyzing Hydrogen Storage of NaAlH4

Cited by 38 publications

References 57 publications

Titanium Hydride Nanoplates Enable 5 wt% of Reversible Hydrogen Storage by Sodium Alanate below 80°C

Titanium Hydride Nanoplates Enable 5 wt% of Reversible Hydrogen Storage by Sodium Alanate below 80°C

Ensemble-Exciting Effect in Pd/alk-Ti3C2 on the Activity for Efficient Hydrogen Production

Electronegativity-Induced Valence State Augmentation of Ni and Co through Electronic Redistribution between Co-Ni3N/CeF3 Interfaces for Oxygen Evolution Reaction

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Synergistic Effect of CeF₃ Nanoparticles Supported on Ti₃C₂ MXene for Catalyzing Hydrogen Storage of NaAlH₄

Ensemble-Exciting Effect in Pd/alk-Ti₃C₂ on the Activity for Efficient Hydrogen Production

Electronegativity-Induced Valence State Augmentation of Ni and Co through Electronic Redistribution between Co-Ni₃N/CeF₃ Interfaces for Oxygen Evolution Reaction