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Vacancy Engineering of Iron‐Doped W~18~O~49~ Nanoreactors for Low‐Barrier Electrochemical Nitrogen Reduction by Tong, Yueyu; Guo, Haipeng; Liu, Daolan; Yan, Xiao; Liang, Ji; Su, Panpan; Zhou, Si; Liu, Jian; Lu, Gao Qing (Max); Dou, Shi Xue is a Chemistry article available to read on EtoBox.

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## Abstract The electrochemical nitrogen reduction reaction (NRR) is a promising energy‐efficient and low‐emission alternative to the traditional Haber–Bosch process. Usually, the competing hydrogen evolution reaction (HER) and the reaction barrier of ambient electrochemical NRR are significant challenges, making a simultaneous high NH~3~ formation rate and high Faradic efficiency (FE) difficult. To give effective NRR electrocatalysis and suppressed HER, the surface atomic structure of W~18~O~49~, which has exposed active W sites and weak binding for H~2~, is doped with Fe. A high NH~3~ formation rate of 24.7 μg h^−1^ mg~cat~^−1^ and a high FE of 20.0 % are achieved at an overpotential of only −0.15 V versus the reversible hydrogen electrode. Ab initio calculations reveal an intercalation‐type doping of Fe atoms in the tunnels of the W~18~O~49~ crystal structure, which increases the oxygen vacancies and exposes more W active sites, optimizes the nitrogen adsorption energy, and facilitates the electrocatalytic NRR.

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Author

Tong, Yueyu; Guo, Haipeng; Liu, Daolan; Yan, Xiao; Liang, Ji; Su, Panpan; Zhou, Si; Liu, Jian; Lu, Gao Qing (Max); Dou, Shi Xue

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley; Research Square (ISSN 0044-8249)

Published

2020

Language

EN

Field

Chemistry (Physical Sciences)