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. 2023 Jan;629(Pt A):950-957.
doi: 10.1016/j.jcis.2022.09.049. Epub 2022 Sep 13.

B-doped MoS2 for nitrate electroreduction to ammonia

Yaojing Luo  1 , Kai Chen  1 , Peng Shen  1 , Xingchuan Li  1 , Xiaotian Li  1 , Yunhe Li  1 , Ke Chu  2
Affiliations

B-doped MoS2 for nitrate electroreduction to ammonia

Yaojing Luo et al. J Colloid Interface Sci. 2023 Jan.

Abstract

Electrocatalytic nitrate-to-ammonia conversion (NO3RR) is a promising route to achieve both NH3 electrosynthesis and wastewater treatment. Herein, we report B-doped MoS2 nanosheet arrays as an efficient NO3RR catalyst, delivering an NH3-Faradaic efficiency of 92.3 % with the corresponding NH3 yield of 10.8 mg h-1 cm-2 at -0.7 V (RHE). Theoretical computations identify B-dopants as the pivotal active sites to enhance NO3- activation and optimize the free energies of reaction intermediates, leading to the expedited NO3RR activity. Meanwhile, the undesired hydrogen evolution can be well suppressed on B-MoS2 to render a high NO3RR selectivity.

Keywords: Electrochemical nitrate reduction; Heteroatom doping; MoS(2) catalysts; Theoretical computations.

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Conflict of interest statement

Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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