The preparation and properties of the UC1-xNx solid solutions by pulses laser carbonitriding

Zhong, Heng; Zhang, Yongbin; Hu, Yin; Chen, Zhilei; Mo, Chuan; Lang, Dingmu; Lu, Linfeng; Wang, Qinguo; Jiang, Xue; Wu, Yanping; Liu, Kezhao

doi:10.1016/j.jallcom.2018.09.285

Cited by 11 publications

(2 citation statements)

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“…For a very long time, although a number of nitrides and carbides of uranium have been reported, appreciable evaluations in respect of their catalytic nature are yet to be explored. [28][29][30][31][32] While several potential reviews on the activity of actinide complexes have been reported in recent years, the review absolutely on the uranium complex catalysis is yet to be presented. Thus, this current review exclusively focuses on the significant advancements in the field of uranyl catalysis where uranyl compounds act as catalysts, and the reactions are specifically categorized into two modules that envelop the following: (a) chemical reactions that progress via photochemically, and (b) chemical reactions that proceed through a thermal pathway.…”

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confidence: 99%

Unprecedented Catalytic Behavior of Uranyl(VI) Compounds in Chemical Reactions

Behera

Sethi

2020

Eur J Inorg Chem

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Uranyl catalysis represents a progressively more significant class of current research. The key species responsible for such catalysis is UO22+ ion which is a remarkably stable molecular component possessing strongly covalent and chemically robust trans U‐oxo groups. Aside from its fundamental interest, an understanding of the chemistry of such divalent UO22+ ion is enviable due to its huge ecological importance. The unprecedented electronic non‐rigidity of uranium center with easy switching among oxidation states and kinetic lability of its coordination states are the key features to bring about a considerable development in its catalytic reactivity profiles. This review explores the topical evolutions of most promising uranyl(VI) catalytic systems appearing in the literature for the last two decades along with reports prior to 2000 incorporated where pertinent. In addition to homometallic uranyl catalysis, a succinct discussion on heterometallic uranyl catalysis is presented. Finally, some relevant comparisons have been made between the uranyl catalysis and transition metal systems.

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Section: +mentioning

confidence: 99%

Unprecedented Catalytic Behavior of Uranyl(VI) Compounds in Chemical Reactions

Behera

Sethi

2020

Eur J Inorg Chem

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“…In 2013, Ismagilov et al reviewed the preparation of different uranium-containing catalysts, predominantly uranium oxides, via thermal and electrolytic decomposition of salts as well as hydrothermal and sol–gel synthesis . Despite the fact that several uranium carbides and nitrides are known (Figure ), reports on the evaluation of their catalytic properties are rare, leaving room for future studies (especially of ternary uranium oxycarbides, carbonitrides, oxynitrides) in this area. − …”

Section: Introductionmentioning

confidence: 99%

Chemistry of Actinide Centers in Heterogeneous Catalytic Transformations of Small Molecules

et al. 2019

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The chemistry of actinide molecules and materials has shown remarkable conceptual advancements in the past decade illustrating their unique reactivity profiles, when compared with lanthanides and transition elements, but there are still some challenging questions on the intriguing stability of low valent states and the significant role of 5f orbitals in bonding and reactivity of actinides. The distinctive electronic flexibility of actinide centers makes them potential catalysts for heterogeneous molecular transformations because of the kinetic lability of their coordination states and facile switching among oxidaton states. Actinide-enabled chemical transformations such as the six-electron reduction of dinitrogen into two reactive ammonia molecules or four-electron oxidation of water into oxygen under mild conditions are promising pathways in the quest of high-efficiency heterogeneous catalysts. This Review provides a comprehensive account on actinide-mediated catalytic transformation of small molecules such as CO, CO2, N2, O2, H2O, CH4, HCl, and NH3. The emphasis is placed on the emerging phenomena in actinide-based solid catalysts and controlled synthesis of nanostructured actinide materials as pristine and substrate-grown phases. The mechanistic investigations highlight the influence of the 5f electrons in multielectron transfer reactions and the propensity of actinide centers to achieve higher oxidation states that defines the surface termination in actinide oxides. Finally, the status and perspectives of actinide-containing materials beyond the nuclear fuel applications is discussed, underlining their exciting chemistry and unexplored potential toward alternative catalytic energy production processes.

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