Nanostructured bimetallic Ni–Fe phosphide nanoplates as an electrocatalyst for efficient N2 fixation under ambient conditions

Jiang, Xiaoli; He, Miao; Tang, Mengyi; Zheng, Qiaoji; Xu, Cheng; Lin, Dunmin

doi:10.1007/s10853-020-05085-5

Cited by 11 publications

(7 citation statements)

References 48 publications

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“…Hence, N 2 is reduced on the Ni x P y surface to NH 3 by accepting electrons and H + (from dissociated water) . Moreover, the negatively charged phosphorus sites anchor protons from H 2 O molecules by hydrogen bonds, which facilitate the mechanistic pathway of N 2 fixation . To ensure the role of active species, the whole reaction was performed using methanol as a sacrificial agent, which showed an enhancement in the activity.…”

Section: Resultsmentioning

confidence: 99%

“…7 Moreover, the negatively charged phosphorus sites anchor protons from H 2 O molecules by hydrogen bonds, which facilitate the mechanistic pathway of N 2 fixation. 61 To ensure the role of active species, the whole reaction was performed using methanol as a sacrificial agent, which showed an enhancement in the activity. This implies that the holes left in the VB of ZnO NRs are used up by methanol and only electrons are involved in the reaction mechanism.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Aggrandizing the Photoactivity of ZnO Nanorods toward N₂ Reduction and H₂ Evolution through Facile In Situ Coupling with Ni_xP_y

Ray

Sultana

Tripathy

et al. 2021

ACS Sustainable Chem. Eng.

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The photocatalytic water and nitrogen reduction in the presence of solar light gives rise to an alternative route for sustainable green energy. This novel approach can resolve the difficulty of greenhouse gas emanation from fossil fuels and global warming and energy crisis. Making headway for developing more robust and efficient photocatalytic systems still remains an enormous challenge toward industrial usage on a large scale. To meet this challenge, herein we report hydrothermally prepared ZnO nanorods (NRs) coupled with nickel phosphide (Ni x P y ) via a lowtemperature phosphidation method. Ni x P y acts as a robust cocatalyst, which increases the visible light absorption efficacy and photocatalytic performance of ZnO NRs toward nitrogen reduction and hydrogen evolution. The nanorod morphology of the ZnO-Ni x P y hybrid is revealed by transmission electron microscopy (TEM) analysis while the formation of the Ni−P moiety and its interaction with ZnO NRs are verified by X-ray photoelectron spectroscopy (XPS) analysis. Besides, the excellent photogenerated charge separation and transfer efficiency are further confirmed using photoluminescence (PL), electrochemical impedance spectroscopy (EIS), and transient analysis, which are the main aspects for activity enhancement in the nickel phosphide-modified ZnO NRs. The optimized ZnO-Ni x P y nanocomposite exhibits an outstanding ammonia production rate of 2304.43 μmol h −1 g −1 without using any organic scavenger or precious noble metal. On the other hand, this catalyst also exhibits stupendous performance with a H 2 generation rate of 10 481 μmol h −1 g −1 using methanol as a hole scavenger. This magnificent result can be attributed to (i) Ni−P sites acting as active reaction sites for nitrogen and proton adsorption and activation, (ii) efficacious charge carrier segregation, and (iii) proficient charge transfer to the surface of nickel phosphide. This finding offers a new avenue for developing noble metalfree phosphide-based hybrids toward highly efficient photocatalytic reactions.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Aggrandizing the Photoactivity of ZnO Nanorods toward N₂ Reduction and H₂ Evolution through Facile In Situ Coupling with Ni_xP_y

Ray

Sultana

Tripathy

et al. 2021

ACS Sustainable Chem. Eng.

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show abstract

“…In addition, the subsequent reduction processes of Fe‐Ni 2 P are exergonic steps except the release of the NH3 molecule needing a free energy of 0.51 eV, further confirming that the catalytic activity was well‐optimized after Fe atom doping. Lin et al 89 . synthesized self‐supported bimetallic electrocatalysts of Ni 12 P 5 /FeP 4 nanoplates grown on carbon cloth (denoted NFP/CC, Figure 11B).…”

Section: Bi‐metallic Fe‐based Catalysts For the Nrrmentioning

confidence: 99%

Section: Bi‐metallic Fe‐based Catalysts For the Nrrmentioning

confidence: 99%

Fe‐based catalysts for nitrogen reduction toward ammonia electrosynthesis under ambient conditions

Zhu

Ren

Yang

et al. 2022

SusMat

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As one of the most important chemicals and carbon‐free energy carriers, ammonia (NH3) has significant energy‐related applications in industry and agriculture. Ninety percent of NH3 is produced by the Haber–Bosch process using high‐purity N2 and H2 at high temperatures and pressures, which consumes about 1% of the total energy production and causes 1.4% of global CO2 emissions. The environmentally friendly electrochemical nitrogen reduction reaction (NRR) with low energy consumption is a promising alternative to the conventional Haber–Bosch process. However, the main issue is the low Faradaic efficiency and NH3 selectivity of electrochemical NRR, caused by inert nitrogen molecules and competitive hydrogen evolution reaction. As one of the cheapest and most abundant transition metals widely utilized in the Haber–Bosch process, the Fe element has presented the potential high performance for the electrochemical NRR. This article summarizes recent advances and research progress in non‐noble Fe‐based catalysts used for NH3 electrosynthesis. Various synthetic protocols, structure/morphology modification, performance improvement, and reaction mechanisms are comprehensively presented. Based on recent experimental and theoretical studies, we aim to illuminate the structure–property relationship and offer an excellent opportunity for engineering advanced Fe‐based catalysts for nitrogen fixation. The most critical challenges and opportunities for Fe‐based catalysts are also provided. This review would open up a promising avenue toward developing platinum‐group‐metal‐free catalysts for electrochemical NRR applications in the future.

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“…Significant efforts, both experimental and theoretical, have been devoted to gain a mechanistic understanding of ENRR and predict and design active and selective catalysts. 10,28,29 In recent years, noble metals 23,30−37 and non-noble metals, 38−42 including their oxides, 43−45 hydroxides, 46−48 nitrides, 49,50 carbides, 51−53 sulfides, 54,55 phosphides, 56,57 metal−organic frameworks, 58,59 and single-atom catalysts, 60,61 have been explored as catalysts for ENRR. Transition-metal nitrides (TMNs), which represent an emerging class of materials currently being explored for application in energy storage and conversion, have gained significant attention as ENRR catalysts.…”

Section: Introductionmentioning

confidence: 99%

A Density Functional Theory Study of Electrochemical Nitrogen Reduction to Ammonia on the (100) Surface of Transition-Metal Oxynitrides

Ologunagba

Kattel

2022

J. Phys. Chem. C

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The electrochemical nitrogen (N 2 ) reduction reaction (ENRR) to produce ammonia (NH 3 ) under ambient conditions is attractive compared to the energy-and carbon-intensive industrialized Haber−Bosch process. However, efficient catalysts are needed to break an N�N bond in an N 2 molecule to convert it to NH 3 . Transition-metal oxynitrides (TMNOs) have shown promising ENRR activities at low potentials. Here, density functional theory (DFT) calculations are performed to study the ENRR activity of TMNO(100) surfaces for TM = Co,

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Nanostructured bimetallic Ni–Fe phosphide nanoplates as an electrocatalyst for efficient N2 fixation under ambient conditions

Cited by 11 publications

References 48 publications

Aggrandizing the Photoactivity of ZnO Nanorods toward N₂ Reduction and H₂ Evolution through Facile In Situ Coupling with Ni_xP_y

Aggrandizing the Photoactivity of ZnO Nanorods toward N₂ Reduction and H₂ Evolution through Facile In Situ Coupling with Ni_xP_y

Fe‐based catalysts for nitrogen reduction toward ammonia electrosynthesis under ambient conditions

A Density Functional Theory Study of Electrochemical Nitrogen Reduction to Ammonia on the (100) Surface of Transition-Metal Oxynitrides

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Nanostructured bimetallic Ni–Fe phosphide nanoplates as an electrocatalyst for efficient N2 fixation under ambient conditions

Cited by 11 publications

References 48 publications

Aggrandizing the Photoactivity of ZnO Nanorods toward N2 Reduction and H2 Evolution through Facile In Situ Coupling with NixPy

Aggrandizing the Photoactivity of ZnO Nanorods toward N2 Reduction and H2 Evolution through Facile In Situ Coupling with NixPy

Fe‐based catalysts for nitrogen reduction toward ammonia electrosynthesis under ambient conditions

A Density Functional Theory Study of Electrochemical Nitrogen Reduction to Ammonia on the (100) Surface of Transition-Metal Oxynitrides

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Aggrandizing the Photoactivity of ZnO Nanorods toward N₂ Reduction and H₂ Evolution through Facile In Situ Coupling with Ni_xP_y

Aggrandizing the Photoactivity of ZnO Nanorods toward N₂ Reduction and H₂ Evolution through Facile In Situ Coupling with Ni_xP_y