Ambient electrochemical N                         2                         -to-NH                         3                          fixation enabled by Nb                         2                         O                         5                          nanowire array

Wenhan Kong; Zaichun Liu; Jingrui Han; Li Xia; Yuan Wang; Qian Liu; Xifeng Shi; Yuping Wu; Yuanhong Xu; Xuping Sun

doi:10.1039/c8qi01049h

Ambient electrochemical N ₂ -to-NH ₃ fixation enabled by Nb ₂ O ₅ nanowire array

Wenhan Kong, Zaichun Liu, Jingrui Han, Li Xia, Yuan Wang, Qian Liu, Xifeng Shi, Yuping Wu, Yuanhong Xu, Xuping Sun

School of energy science and engineering

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52 Scopus citations

Abstract

Electrochemical reduction offers a carbon-neutral process for energy-saving NH ₃ synthesis under ambient conditions, but this process involves difficulty in breaking the strong NN bond of inert N ₂ and the challenge of N ₂ activation, underlining the need for high-performance electrocatalysts for the nitrogen reduction reaction (NRR). Herein, we report our recent effort in this direction by in situ hydrothermally growing a Nb ₂ O ₅ nanowire array on carbon cloth (Nb ₂ O ₅ /CC) as a self-standing NRR catalyst electrode toward artificial N ₂ fixation with high selectivity under ambient conditions. In 0.1 M Na ₂ SO ₄ , such Nb ₂ O ₅ /CC achieves an NH ₃ formation rate of 1.58 × 10 ^-10 mol s ^-1 cm ^-2 and a high faradaic efficiency of 2.26% at -0.60 V, rivaling the performances of most reported non-noble metal NRR electrocatalysts in neutral medium. Notably, this catalyst also shows high electrochemical stability during electrolysis and recycling tests. Density functional theory calculations reveal that a distal associative route is involved in the reaction pathways during the NRR over the Nb ₂ O ₅ (001) facet. This work would open up an exciting new avenue to explore the design of self-standing 3D electrodes made of transition metal oxides for the NRR and other applications.

Original language	English
Pages (from-to)	423-427
Number of pages	5
Journal	Inorganic Chemistry Frontiers
Volume	6
Issue number	2
DOIs	https://doi.org/10.1039/c8qi01049h
State	Published - Feb 2019

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Kong, W., Liu, Z., Han, J., Xia, L., Wang, Y., Liu, Q., Shi, X., Wu, Y., Xu, Y., & Sun, X. (2019). Ambient electrochemical N ₂ -to-NH ₃ fixation enabled by Nb ₂ O ₅ nanowire array Inorganic Chemistry Frontiers, 6(2), 423-427. https://doi.org/10.1039/c8qi01049h

Kong, Wenhan ; Liu, Zaichun ; Han, Jingrui et al. / Ambient electrochemical N ₂ -to-NH ₃ fixation enabled by Nb ₂ O ₅ nanowire array In: Inorganic Chemistry Frontiers. 2019 ; Vol. 6, No. 2. pp. 423-427.

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title = " Ambient electrochemical N 2 -to-NH 3 fixation enabled by Nb 2 O 5 nanowire array ",

abstract = " Electrochemical reduction offers a carbon-neutral process for energy-saving NH 3 synthesis under ambient conditions, but this process involves difficulty in breaking the strong NN bond of inert N 2 and the challenge of N 2 activation, underlining the need for high-performance electrocatalysts for the nitrogen reduction reaction (NRR). Herein, we report our recent effort in this direction by in situ hydrothermally growing a Nb 2 O 5 nanowire array on carbon cloth (Nb 2 O 5 /CC) as a self-standing NRR catalyst electrode toward artificial N 2 fixation with high selectivity under ambient conditions. In 0.1 M Na 2 SO 4 , such Nb 2 O 5 /CC achieves an NH 3 formation rate of 1.58 × 10 -10 mol s -1 cm -2 and a high faradaic efficiency of 2.26% at -0.60 V, rivaling the performances of most reported non-noble metal NRR electrocatalysts in neutral medium. Notably, this catalyst also shows high electrochemical stability during electrolysis and recycling tests. Density functional theory calculations reveal that a distal associative route is involved in the reaction pathways during the NRR over the Nb 2 O 5 (001) facet. This work would open up an exciting new avenue to explore the design of self-standing 3D electrodes made of transition metal oxides for the NRR and other applications.",

author = "Wenhan Kong and Zaichun Liu and Jingrui Han and Li Xia and Yuan Wang and Qian Liu and Xifeng Shi and Yuping Wu and Yuanhong Xu and Xuping Sun",

note = "Publisher Copyright: {\textcopyright} 2019 the Partner Organisations.",

year = "2019",

month = feb,

doi = "10.1039/c8qi01049h",

language = "英语",

volume = "6",

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Kong, W, Liu, Z, Han, J, Xia, L, Wang, Y, Liu, Q, Shi, X, Wu, Y, Xu, Y & Sun, X 2019, ' Ambient electrochemical N ₂ -to-NH ₃ fixation enabled by Nb ₂ O ₅ nanowire array ', Inorganic Chemistry Frontiers, vol. 6, no. 2, pp. 423-427. https://doi.org/10.1039/c8qi01049h

Ambient electrochemical N ₂ -to-NH ₃ fixation enabled by Nb ₂ O ₅ nanowire array . / Kong, Wenhan; Liu, Zaichun; Han, Jingrui et al.
In: Inorganic Chemistry Frontiers, Vol. 6, No. 2, 02.2019, p. 423-427.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Ambient electrochemical N 2 -to-NH 3 fixation enabled by Nb 2 O 5 nanowire array

AU - Kong, Wenhan

AU - Liu, Zaichun

AU - Han, Jingrui

AU - Xia, Li

AU - Wang, Yuan

AU - Liu, Qian

AU - Shi, Xifeng

AU - Wu, Yuping

AU - Xu, Yuanhong

AU - Sun, Xuping

PY - 2019/2

Y1 - 2019/2

N2 - Electrochemical reduction offers a carbon-neutral process for energy-saving NH 3 synthesis under ambient conditions, but this process involves difficulty in breaking the strong NN bond of inert N 2 and the challenge of N 2 activation, underlining the need for high-performance electrocatalysts for the nitrogen reduction reaction (NRR). Herein, we report our recent effort in this direction by in situ hydrothermally growing a Nb 2 O 5 nanowire array on carbon cloth (Nb 2 O 5 /CC) as a self-standing NRR catalyst electrode toward artificial N 2 fixation with high selectivity under ambient conditions. In 0.1 M Na 2 SO 4 , such Nb 2 O 5 /CC achieves an NH 3 formation rate of 1.58 × 10 -10 mol s -1 cm -2 and a high faradaic efficiency of 2.26% at -0.60 V, rivaling the performances of most reported non-noble metal NRR electrocatalysts in neutral medium. Notably, this catalyst also shows high electrochemical stability during electrolysis and recycling tests. Density functional theory calculations reveal that a distal associative route is involved in the reaction pathways during the NRR over the Nb 2 O 5 (001) facet. This work would open up an exciting new avenue to explore the design of self-standing 3D electrodes made of transition metal oxides for the NRR and other applications.

AB - Electrochemical reduction offers a carbon-neutral process for energy-saving NH 3 synthesis under ambient conditions, but this process involves difficulty in breaking the strong NN bond of inert N 2 and the challenge of N 2 activation, underlining the need for high-performance electrocatalysts for the nitrogen reduction reaction (NRR). Herein, we report our recent effort in this direction by in situ hydrothermally growing a Nb 2 O 5 nanowire array on carbon cloth (Nb 2 O 5 /CC) as a self-standing NRR catalyst electrode toward artificial N 2 fixation with high selectivity under ambient conditions. In 0.1 M Na 2 SO 4 , such Nb 2 O 5 /CC achieves an NH 3 formation rate of 1.58 × 10 -10 mol s -1 cm -2 and a high faradaic efficiency of 2.26% at -0.60 V, rivaling the performances of most reported non-noble metal NRR electrocatalysts in neutral medium. Notably, this catalyst also shows high electrochemical stability during electrolysis and recycling tests. Density functional theory calculations reveal that a distal associative route is involved in the reaction pathways during the NRR over the Nb 2 O 5 (001) facet. This work would open up an exciting new avenue to explore the design of self-standing 3D electrodes made of transition metal oxides for the NRR and other applications.

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U2 - 10.1039/c8qi01049h

DO - 10.1039/c8qi01049h

M3 - 文章

AN - SCOPUS:85061632214

SN - 2052-1545

VL - 6

SP - 423

EP - 427

JO - Inorganic Chemistry Frontiers

JF - Inorganic Chemistry Frontiers

IS - 2

ER -

Kong W, Liu Z, Han J, Xia L, Wang Y, Liu Q et al. Ambient electrochemical N ₂ -to-NH ₃ fixation enabled by Nb ₂ O ₅ nanowire array Inorganic Chemistry Frontiers. 2019 Feb;6(2):423-427. doi: 10.1039/c8qi01049h

Ambient electrochemical N ₂ -to-NH ₃ fixation enabled by Nb ₂ O ₅ nanowire array

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