High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

He, Xun; Li, Zixiao; Yao, Jie; Dong, Kai; Li, Xiuhong; Hu, Long; Sun, Shengjun; Cai, Zhengwei; Zheng, Dongdong; Luo, Yongsong; Ying, Binwu; Hamdy, Mohamed S.; Xie, Lisi; Liu, Qian; Sun, Xuping

doi:10.1016/j.isci.2023.107100

Cited by 93 publications

(49 citation statements)

References 52 publications

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“…Precious metal-based catalysts have admirable catalytic activity for the NO 2 – RR. − Their scarcity and high price, nevertheless, pose significant obstacles to their widespread application. It thus holds significant practical importance to explore earth-abundant nonprecious alternatives. − ,− As an transition-metal phosphide, FeP has found applications in electrocatalytic hydrogen evolution and hydrogenation of N 2 and carbon dioxide (CO 2 ), − and it also demonstrates catalytic ability toward the NO 2 – RR . Titanium dioxide (TiO 2 ) featuring abundance, nontoxicity, and excellent chemical stability has gained considerable attention as a support for active nanocatalysts. − Our recent study confirms its NO 2 – RR activity .…”

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confidence: 63%

High-Performance Electrocatalytic Reduction of Nitrite to Ammonia under Ambient Conditions on a FeP@TiO₂ Nanoribbon Array

Zhang

Liang

et al. 2023

Inorg. Chem.

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Electrochemical nitrite (NO 2 − ) reduction is recognized as a promising strategy for synthesizing valuable ammonia (NH 3 ) and degrading NO 2 − pollutants in wastewater. The six-electron process for the NO 2 − reduction reaction is complex and necessitates a highly selective and stable electrocatalyst for efficient conversion of NO 2 − to NH 3 . Herein, a FeP nanoparticledecorated TiO 2 nanoribbon array on a titanium plate (FeP@TiO 2 /TP) is proposed as an efficient catalyst for NH 3 production under ambient conditions. In 0.1 M NaOH with 0.1 M NO 2 − , such a FeP@TiO 2 /TP affords a large NH 3 yield of 346.6 μmol h −1 cm −2 and a high Faradaic efficiency of 97.1%. Additionally, it demonstrates excellent stability and durability during long-term cycling tests and electrolysis experiments.

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confidence: 63%

High-Performance Electrocatalytic Reduction of Nitrite to Ammonia under Ambient Conditions on a FeP@TiO₂ Nanoribbon Array

Zhang

Liang

et al. 2023

Inorg. Chem.

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“…The absorbance at a wavelength of 655 nm was used to calculate the indophenol blue concentration. Various amounts of standard ammonium chloride solution were used to generate the concentration-absorbance calibration curve Figure S1a,b. − …”

Section: Methodsmentioning

confidence: 99%

Fe-Single-Atom Catalysts on Nitrogen-Doped Carbon Nanosheets for Electrochemical Conversion of Nitrogen to Ammonia

Agour,

Elkersh,

Khedr

et al. 2023

ACS Appl. Nano Mater.

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Electrochemical nitrogen reduction reaction (NRR) has been established as a promising and sustainable alternative to the Haber−Bosch process, which requires intensive energy to produce ammonia. Unfortunately, NRR is constrained by the high adsorption/activation of the N 2 energy barrier and the competing hydrogen evolution reaction, resulting in low faradic efficiency. Herein, a well-dispersed iron single-atom catalyst was successfully immobilized on nitrogen-doped carbon nanosheets (Fe SAC -N-C) synthesized from pre-hydrothermally derived Fe-doped carbon quantum dots with an average particle size of 2.36 nm and used for efficient electrochemical N 2 fixation at ambient conditions. The as-synthesized Fe SAC -N-C catalyst records an onset potential of 0.12 V RHE , exhibiting a considerable faradic efficiency of 23.7% and an NH 3 yield rate of 3.47 μg h −1 cm −2 in aqueous 0.1 M KOH electrolyte at a potential of −0.1 V RHE under continuous N 2 feeding conditions. The control experiments assert that the produced NH 3 molecules only emerge from the dissolved N 2 -gas, reflecting the remarkable stability of the nitrogen−carbon framework during electrolysis. The DFT calculations showed the Fe SAC -N-C catalyst to demonstrate a lower energy barrier during the rate-limiting step of the NRR process, consistent with the observed high activity of the catalyst. This study highlights the exceptional potential of single-atom catalysts for electrochemical NRR and offers a comprehensive understanding of the catalytic mechanisms involved. Ultimately, this work provides a facile synthesis strategy of Fe SAC -N-C nanosheets with high atomic-dispersion, creating a novel design avenue of Fe SAC -N-C that can vividly have a potential applicability in the large spectrum of electrocatalytic applications.

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“…In the Co 2p region (Figure b), Fe-CoCH has shown four major peaks with two satellites. The peaks at the BEs of 797.4 and 781.4 eV can be attributed to Co 2+ . , Compared to the CoCH, the Co 2p peaks of Fe-CoCH shift slightly toward lower BE, which is associated with the distortion of CoCH caused by Fe doping . As displayed in Figure c, the C 1s spectrum shows three characteristic peaks at the BEs of 288.9, 286.0, and 284.5 eV, ascribed to O-CO, CO, and C-C, respectively. , Additionally, three characteristic peaks in the O 1s region at the BEs of 534.3, 532.5, and 531.0 eV are attributed to C-OH, CO 3 2– , and lattice oxygen (M-OH), respectively. , …”

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confidence: 90%

“…The peaks at the BEs of 797.4 and 781.4 eV can be attributed to Co 2+ . 37,38 Compared to the CoCH, the Co 2p peaks of Fe-CoCH shift slightly toward lower BE, which is associated with the distortion of CoCH caused by Fe doping. 39 As displayed in Figure 2c, the C 1s spectrum shows three characteristic peaks at the BEs of 288.9, 286.0, and 284. , and lattice oxygen (M-OH), respectively.…”

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confidence: 99%

Improved Electrochemical Alkaline Seawater Oxidation over Cobalt Carbonate Hydroxide Nanowire Array by Iron Doping

Shi

Sun

et al. 2023

Inorg. Chem.

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Constructing efficient and low-cost oxygen evolution reaction (OER) catalysts operating in seawater is essential for green hydrogen production but remains a great challenge. In this study, we report an iron doped cobalt carbonate hydroxide nanowire array on nickel foam (Fe-CoCH/NF) as a high-efficiency OER electrocatalyst. In alkaline seawater, such Fe-CoCH/NF demands an overpotential of 387 mV to drive 500 mA cm–2, superior to that of CoCH/NF (597 mV). Moreover, it achieves excellent electrochemical and structural stability in alkaline seawater.

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High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

Cited by 93 publications

References 52 publications

High-Performance Electrocatalytic Reduction of Nitrite to Ammonia under Ambient Conditions on a FeP@TiO₂ Nanoribbon Array

High-Performance Electrocatalytic Reduction of Nitrite to Ammonia under Ambient Conditions on a FeP@TiO₂ Nanoribbon Array

Fe-Single-Atom Catalysts on Nitrogen-Doped Carbon Nanosheets for Electrochemical Conversion of Nitrogen to Ammonia

Improved Electrochemical Alkaline Seawater Oxidation over Cobalt Carbonate Hydroxide Nanowire Array by Iron Doping

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High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

Cited by 93 publications

References 52 publications

High-Performance Electrocatalytic Reduction of Nitrite to Ammonia under Ambient Conditions on a FeP@TiO2 Nanoribbon Array

High-Performance Electrocatalytic Reduction of Nitrite to Ammonia under Ambient Conditions on a FeP@TiO2 Nanoribbon Array

Fe-Single-Atom Catalysts on Nitrogen-Doped Carbon Nanosheets for Electrochemical Conversion of Nitrogen to Ammonia

Improved Electrochemical Alkaline Seawater Oxidation over Cobalt Carbonate Hydroxide Nanowire Array by Iron Doping

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High-Performance Electrocatalytic Reduction of Nitrite to Ammonia under Ambient Conditions on a FeP@TiO₂ Nanoribbon Array

High-Performance Electrocatalytic Reduction of Nitrite to Ammonia under Ambient Conditions on a FeP@TiO₂ Nanoribbon Array