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. 2022 Mar 1;13:1098. doi: 10.1038/s41467-022-28740-8

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 6 — a In situ DRIFTS for ethylene glycol (EG, hole sacrificial agent) oxidation during the NO₃⁻RR. b Ammonia synthesis rates and selectivity evaluation by adding different types of simulated wastewater into the catalysis system (Catal. Sys.), including the organic matter (phenol, benzyl alcohol and formaldehyde), cation (Co²⁺, Ni²⁺ and Cd²⁺) and anion (SO₄²⁻, PO₄³⁻ and CO₃²⁻) contaminants correspondingly. As for the condition of formaldehyde, the catalytic tests were conducted with and without EG respectively.