Oxygen vacancy enhancing mechanism of nitrogen reduction reaction property in Ru/TiO2

Cheng, Shan; Gao, Yijing; Yan, Yi‐Long; Gao, Xu; Zhang, Shaohua; Zhuang, Guilin; Deng, Shengwei; Wei, Zhongzhe; Zhong, Xing; Wang, Jianguo

doi:10.1016/j.jechem.2019.01.020

Cited by 89 publications

(32 citation statements)

References 62 publications

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“…After five cycles of 2 h electrolysis, a stable FE was achieved around 11 % (Figure 3 a) with a small decrease in the rate of NH 3 production that could be attributed to the consumption of defects sites on the rGO or the adsorption of NH 3 on the catalyst surface. [9] Moreover, a stable current density was obtained during continuous electrolysis for 12 h, indicating the stability and durability of this catalyst (Figure 3 b). The homogenous size distribution of Ru nanocrystals is retained after 12 h electrolysis that validates the role of surface modification in the stability and durability of material (Supporting Information, Figure S18).…”

Section: Methodsmentioning

confidence: 83%

“…[3][4][5][6][7] Ru-based transition metal catalysts are active catalysts for NRR at ambient conditions that can activate and polarize the inert N 2 molecule by accepting and donating electronic density. [8][9][10][11] However, they are limited by the low selectivity and faradaic efficiency (FE) towards NH 3 that could be attributed to the high affinity of H-adsorption on the Ru surface.…”

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confidence: 99%

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Metal–Sulfur Linkages Achieved by Organic Tethering of Ruthenium Nanocrystals for Enhanced Electrochemical Nitrogen Reduction

et al. 2020

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Inspired by the metal–sulfur (M‐S) linkages in the nitrogenase enzyme, here we show a surface modification strategy to modulate the electronic structure and improve the N2 availability on a catalytic surface, which suppresses the hydrogen evolution reaction (HER) and improves the rate of NH3 production. Ruthenium nanocrystals anchored on reduced graphene oxide (Ru/rGO) are modified with different aliphatic thiols to achieve M‐S linkages. A high faradaic efficiency (11 %) with an improved NH3 yield (50 μg h−1 mg−1) is achieved at −0.1 V vs. RHE in acidic conditions by using dodecanethiol. DFT calculations reveal intermediate N2 adsorption and desorption of the product is achieved by electronic structure modification along with the suppression of the HER by surface modification. The modified catalyst shows excellent stability and recyclability for NH3 production, as confirmed by rigorous control experiments including 15N isotope labeling experiments.

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Section: Methodsmentioning

confidence: 83%

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confidence: 99%

Metal–Sulfur Linkages Achieved by Organic Tethering of Ruthenium Nanocrystals for Enhanced Electrochemical Nitrogen Reduction

et al. 2020

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“…Wang et al . have prepared oxygen‐vacancy rich TiO 2 embedded with Ru nanoparticles (denoted as Ru/TiO 2 ‐OV), which shows a NH 3 production rate of 2.11 μg h −1 cm −2 and an FE of 6.5% in 0.1 M KOH solution 84 . According to DFT calculations and experimental results, TiO 2 with OVs donates electrons to Ru nanoparticles and facilitates absorption of N 2 on Ru nanoparticle.…”

Section: Advances In the Design And Synthesis Of Tio2‐based Catalysts For Nrrmentioning

confidence: 99%

Recent advances in TiO₂‐based catalysts for N₂ reduction reaction

Chen

Zhang

et al. 2021

SusMat

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Nitrogen (N2) fixation under mild conditions is a promising approach for green production of ammonia (NH3). In the past decades, various advanced catalysts have been fabricated to achieve this goal through electrocatalytic and photocatalytic processes. Among them, the TiO2‐based catalysts have been recognized as promising candidates due to their high activity, low cost, chemical stability, and nontoxicity. In this review, recent advances in the fabrication of high‐performance TiO2‐based materials for N2 reduction reaction (NRR) under mild conditions are summarized, including electrocatalytic and photocatalytic NRR. The design principles, synthetic strategies, and corresponding chemical/physical properties of TiO2‐based NRR catalysts are described in detail. Moreover, the key challenges and potential opportunities in this field are presented and discussed.

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“…2,3 One method to do this is the on-site production of nitrogen fixation technology. Currently, nitrogen fixation is being studied in the fields of catalyst development, [4][5][6] electrolytic synthesis, [7][8][9] and discharge technology, [10][11][12] in order to perform on-site production with low energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Fixation through the Plasma/Liquid Interfacial Reaction with Controlled Conditions of Each Phase as the Reaction Locus

et al. 2020

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In the plasma/liquid (P/L) interfacial reaction, nitrogen fixation is performed on a water phase surface. In the P/L reaction, discharged nitrogen gas reacts with water molecules at the interface between the plasma gas phase and the water phase, followed by either a reduction reaction, ammonia production or oxidation reaction, nitric acid production. The production of nitric acid in the P/L reaction is influenced by the concentration of oxygen present in each gas phase and water phase, and the atomic nitrogen contained in the nitrogen plasma. For the reduction reaction at the P/L reaction locus, the water phase was modulated in order to make ammonia production dominant in nitrogen fixation. Ammonia is released into the gas phase under conditions of high water temperature and high pH. To obtain only ammonia using this reaction, it is necessary to incorporate a process for raising the temperature of the water. In the P/L reaction, only the ammonia gas can be obtained in one-step by using the rise in water temperature due to the discharged heat plasma gas. A reaction system was developed to control the water and the gas phase to enable high purity ammonia trapping as released by the gas phase.

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Oxygen vacancy enhancing mechanism of nitrogen reduction reaction property in Ru/TiO2

Cited by 89 publications

References 62 publications

Metal–Sulfur Linkages Achieved by Organic Tethering of Ruthenium Nanocrystals for Enhanced Electrochemical Nitrogen Reduction

Metal–Sulfur Linkages Achieved by Organic Tethering of Ruthenium Nanocrystals for Enhanced Electrochemical Nitrogen Reduction

Recent advances in TiO₂‐based catalysts for N₂ reduction reaction

Nitrogen Fixation through the Plasma/Liquid Interfacial Reaction with Controlled Conditions of Each Phase as the Reaction Locus

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Oxygen vacancy enhancing mechanism of nitrogen reduction reaction property in Ru/TiO2

Cited by 89 publications

References 62 publications

Metal–Sulfur Linkages Achieved by Organic Tethering of Ruthenium Nanocrystals for Enhanced Electrochemical Nitrogen Reduction

Metal–Sulfur Linkages Achieved by Organic Tethering of Ruthenium Nanocrystals for Enhanced Electrochemical Nitrogen Reduction

Recent advances in TiO2‐based catalysts for N2 reduction reaction

Nitrogen Fixation through the Plasma/Liquid Interfacial Reaction with Controlled Conditions of Each Phase as the Reaction Locus

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Product

Resources

About

Recent advances in TiO₂‐based catalysts for N₂ reduction reaction