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Atomically dispersed Pt–N4 sites as efficient and selective electrocatalysts for the chlorine evolution reaction

Author

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  • Taejung Lim

    (Ulsan National Institute of Science and Technology (UNIST))

  • Gwan Yeong Jung

    (Ulsan National Institute of Science and Technology (UNIST))

  • Jae Hyung Kim

    (Ulsan National Institute of Science and Technology (UNIST))

  • Sung O Park

    (Ulsan National Institute of Science and Technology (UNIST))

  • Jaehyun Park

    (Ulsan National Institute of Science and Technology (UNIST))

  • Yong-Tae Kim

    (Pohang University of Science and Technology (POSTECH))

  • Seok Ju Kang

    (Ulsan National Institute of Science and Technology (UNIST))

  • Hu Young Jeong

    (Ulsan National Institute of Science and Technology (UNIST))

  • Sang Kyu Kwak

    (Ulsan National Institute of Science and Technology (UNIST))

  • Sang Hoon Joo

    (Ulsan National Institute of Science and Technology (UNIST))

Abstract

Chlorine evolution reaction (CER) is a critical anode reaction in chlor-alkali electrolysis. Although precious metal-based mixed metal oxides (MMOs) have been widely used as CER catalysts, they suffer from the concomitant generation of oxygen during the CER. Herein, we demonstrate that atomically dispersed Pt−N4 sites doped on a carbon nanotube (Pt1/CNT) can catalyse the CER with excellent activity and selectivity. The Pt1/CNT catalyst shows superior CER activity to a Pt nanoparticle-based catalyst and a commercial Ru/Ir-based MMO catalyst. Notably, Pt1/CNT exhibits near 100% CER selectivity even in acidic media, with low Cl− concentrations (0.1 M), as well as in neutral media, whereas the MMO catalyst shows substantially lower CER selectivity. In situ electrochemical X-ray absorption spectroscopy reveals the direct adsorption of Cl− on Pt−N4 sites during the CER. Density functional theory calculations suggest the PtN4C12 site as the most plausible active site structure for the CER.

Suggested Citation

  • Taejung Lim & Gwan Yeong Jung & Jae Hyung Kim & Sung O Park & Jaehyun Park & Yong-Tae Kim & Seok Ju Kang & Hu Young Jeong & Sang Kyu Kwak & Sang Hoon Joo, 2020. "Atomically dispersed Pt–N4 sites as efficient and selective electrocatalysts for the chlorine evolution reaction," Nature Communications, Nature, vol. 11(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-14272-1
    DOI: 10.1038/s41467-019-14272-1
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    Cited by:

    1. Tianbao Ye & Cheng Chen & Di Wang & Chengjie Huang & Zhiwen Yan & Yu Chen & Xian Jin & Xiuyuan Wang & Xianting Ding & Chengxing Shen, 2024. "Protective effects of Pt-N-C single-atom nanozymes against myocardial ischemia-reperfusion injury," Nature Communications, Nature, vol. 15(1), pages 1-19, December.
    2. Junsic Cho & Taejung Lim & Haesol Kim & Ling Meng & Jinjong Kim & Seunghoon Lee & Jong Hoon Lee & Gwan Yeong Jung & Kug-Seung Lee & Francesc Viñes & Francesc Illas & Kai S. Exner & Sang Hoon Joo & Cha, 2023. "Importance of broken geometric symmetry of single-atom Pt sites for efficient electrocatalysis," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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