CoNiOOH nanosheets array enables highly effective value-added chemicals production via nitrite and sulfide electrolysis

Miaosen Yang, Tianran Wei, Chunhui Zeng, Jingwen Zhang, Yifan Liu, Jun Luo, Guangzhi Hu, Xijun Liu

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Here, we show that the CoNiOOH nanosheets array can be applied for catalyzing nitrite reduction and sulfide oxidation reactions (NO2RR and SOR) simultaneously, realizing NH3 production and synchronous desulfuration. As a result, the catalyst achieves a maximal Faradic efficiency of 93 % with the corresponding yield rate of 14.6mg h−1 cm−2 for NH3 production and high robustness over 4 consecutive cycles. Beyond that, it could trigger the SOR with a low potential of 0.65 V vs RHE to reach 100 mA cm−2, far lower than that needed for the water oxidation (1.62 V vs RHE). More importantly, the coupling system composed of NO2RR and SOR could realize value-added products on both sides. Theoretical and experimental analyses validate that Ni regulates the electronic structure of Co site, which optimizes the activation and adsorption of reactants and intermediates, and thus reduce the energy barriers, accounting for the performance enhancement.

Original languageEnglish
Article number155799
JournalChemical Engineering Journal
Volume498
DOIs
StatePublished - Oct 15 2024
Externally publishedYes

Funding

This work was financially supported by the National Natural Science Foundation of China ( 22075211 ), Guangxi Natural Science Fund for Distinguished Young Scholars ( 2024GXNSFFA010008 ), Shenzhen Science and Technology Program (JCYJ20230807112503008), Guangdong Basic and Applied Basic Research Foundation ( 2024A1515012841 ), and Natural Science Foundation of Jilin Province of China ( 20240101098JC ).

FundersFunder number
Science, Technology and Innovation Commission of Shenzhen MunicipalityJCYJ20230807112503008
Science, Technology and Innovation Commission of Shenzhen Municipality
Natural Science Foundation of Jilin Province20240101098JC
Natural Science Foundation of Jilin Province
Basic and Applied Basic Research Foundation of Guangdong Province2024A1515012841
Basic and Applied Basic Research Foundation of Guangdong Province
National Natural Science Foundation of China22075211
National Natural Science Foundation of China
Science Fund for Distinguished Young Scholars of Guangxi Province2024GXNSFFA010008
Science Fund for Distinguished Young Scholars of Guangxi Province

    Keywords

    • Bifunctional catalyst
    • Electrosynthesis
    • Nitrite reduction reaction
    • Sulfide oxidation reaction
    • Value-added chemicals

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