Nanodenitrification with bimetallic nanoparticles confined in N-doped mesoporous carbon

Wang, Jing; Teng, Wei; Ling, Lan; Fan, Jianwei; Zhang, Wei‐xian; Deng, Zilong

doi:10.1039/d0en00087f

Cited by 35 publications

(45 citation statements)

References 48 publications

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“…Recently, a high nitrogen selectivity (97%) and nitrate removal (91%) were achieved in Cu‐Pd nanocrystals confined in N‐doped ordered mesoporous carbon (OMC) (Cu–Pd@N‐OMC). [ 80 ] The strategy for the preparation of Cu–Pd@N–OMC is outlined in Figure a, in which N–Cu–Pd MOFs were prepared by a modular approach that involved binding organic ligands with metal ions (Cu and Pd). Then, a confinement reduction and pyrolysis were performed to obtain a 3D Cu–Pd@N–OMC.…”

Section: Critical Factors Governing the Selectivity Of Electrochemicamentioning

confidence: 99%

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Restoring the Nitrogen Cycle by Electrochemical Reduction of Nitrate: Progress and Prospects

et al. 2020

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The increasing amount of anthropogenic nitrogen has resulted in alarming levels of nitrate in bodies of water and caused a cascade of damage to the environment and human health. Electrochemical nitrate reduction is an efficient strategy ancillary to biological nitrogen cycle management, which utilizes electrons as green reductants and rebalances the N 2 cycle. In this review, the fundamental principles and implementation of electrochemical nitrate reduction are described to lay the foundation for the eventual large-scale application in the remediation of nitrate-laden wastewaters. Factors that influence the activity and selectivity of electrochemical nitrate reduction are also discussed. Moreover, electrolytic cell design and construction are discussed via a rational choice of critical components and assembly. Finally, a roadmap for the development of highly selective nitrate reduction catalysts is proposed. This review attempts to provide a practical strategy for electrochemical nitrogen cycle management and aims to stimulate future research for final implementation.

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Section: Critical Factors Governing the Selectivity Of Electrochemicamentioning

confidence: 99%

“…Flourishing advancements in synthesis allow for the creation of catalysts with high selectivity and activity resembling Reproduced with permission. [80] Copyright 2020, The Royal Society of Chemistry.…”

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confidence: 99%

Restoring the Nitrogen Cycle by Electrochemical Reduction of Nitrate: Progress and Prospects

et al. 2020

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“…Thus, introducing secondary materials consisting of a bimetal system is necessary to achieve high nitrogen selectivity. Pd–Cu bimetal electrocatalysts exhibit high N 2 selectivity (99% by CuPd on Ni foam, 97% by Cu–Pd@N-doped ordered mesoporous carbon, and 85.5% by CuPd/rGO). This is due to Cu capturing and reducing nitrate and Pd promoting nitrite reduction to N 2 .…”

Section: Future Manufacturing Of Ammonia and Nitric Acidmentioning

confidence: 99%

Ammonia and Nitric Acid Demands for Fertilizer Use in 2050

et al. 2021

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Access to nitrogen-based fertilizers is critical to maximize agricultural yield, as nitrogen is the most common rate-limiting nutrient. Nearly all nitrogenbased fertilizers rely on ammonia and nitric acid as feedstocks, and thus the demand for these chemicals is heavily dependent on the global population and food demand. Over the next three decades, the global population will continue to dictate the market size and value for ammonia and nitric acid, which consequently will have a significant impact on our energy infrastructure. Here, we discuss the potential for carbon-free electrocatalytic nitrogen reduction, nitrogen oxidation, and nitrate reduction to meet fertilizer manufacturing demands. We also explore various growth scenarios to predict the 2050 market size and value for ammonia and nitric acid. We highlight that if the current approaches for manufacturing ammonia and nitric acid remain constant, carbon emissions from the production of fixed fertilizer feedstocks could exceed 1300 Mt CO 2eq /yr, prompting a strong need for green alternatives.

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“…28,29 After being doped with active metal components, OMCs are especially useful in redox reactions. 30,31 Generally, metal-doped OMC catalysts are prepared by a two-step process in which OMCs are synthesized by hard template or soft template methods in step one and doped with active metals including reduction in step two. 23,32,33 However, these two-step approaches often lead to the agglomeration of active metals in the reduction step so that new methods are needed.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Ordered mesoporous carbons (OMCs) are one of the emerging carbon materials and have been demonstrated to have many desirable characteristics, such as a uniform pore channel, large mesopore size, high pore volume, and chemical inertness, all of which are desirable attributes for catalyst supports. , After being doped with active metal components, OMCs are especially useful in redox reactions. , Generally, metal-doped OMC catalysts are prepared by a two-step process in which OMCs are synthesized by hard template or soft template methods in step one and doped with active metals including reduction in step two. ,, However, these two-step approaches often lead to the agglomeration of active metals in the reduction step so that new methods are needed.…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic Lignin-Derived Ordered Mesoporous Carbon for Catalytic Hydrogenation of Furfural to Furfuryl Alcohol

Wang

Qiu

Smith

et al. 2020

ACS Sustainable Chem. Eng.

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Ferromagnetic Ni-doped lignin-derived ordered mesoporous carbon (Ni@OMC) was synthesized in one pot by evaporation-induced self-assembly (EISA) for use as catalysts. Lignin was used to partially replace phloroglucinol (up to 80%) as the carbon precursor under conditions that allowed ordered mesoporous structures to be perfectly retained and Ni particles to be uniformly dispersed within the material. The as-synthesized Ni@OMC catalysts promoted hydrogenation of furfural, affording furfuryl alcohol (FAL) yields and selectivities as high as 91.0 and 98.6% at 180 °C for a 12 h reaction time in the presence of H 2 gas. The Ni@OMC catalyst could be simply separated through application of a magnetic field and was recyclable for at least five cycles. The stability of the Ni@OMC catalyst is attributed to space confinement effects of the carbon skeleton on the doped Ni particles through coordinated interactions between lignin and metal ions (Ni 2+ ). The proposed method allows the synthesis of metal-doped ordered porous carbons from lignin and is green and sustainable.

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Nanodenitrification with bimetallic nanoparticles confined in N-doped mesoporous carbon

Abstract: Nanodenitrification on hierarchical nanoscaffolds with Cu–Pd nanocrystals confined in N-doped OMC.

Cited by 35 publications

References 48 publications

Restoring the Nitrogen Cycle by Electrochemical Reduction of Nitrate: Progress and Prospects

Restoring the Nitrogen Cycle by Electrochemical Reduction of Nitrate: Progress and Prospects

Ammonia and Nitric Acid Demands for Fertilizer Use in 2050

Ferromagnetic Lignin-Derived Ordered Mesoporous Carbon for Catalytic Hydrogenation of Furfural to Furfuryl Alcohol

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