A Strong Magnetic Field Alters the Activity and Selectivity of the CO2RR by Restraining C–C Coupling

Wang, Peichen; Qu, Yafei; Meng, Xiangfu; Tu, Jinwei; Zheng, Wei; Hu, Lin; Chen, Qianwang

doi:10.3390/magnetochemistry9030065

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A Strong Magnetic Field Alters the Activity and Selectivity of the CO₂RR by Restraining C–C Coupling

by

Peichen Wang

¹,

Yafei Qu

¹,

Xiangfu Meng

²,

Jinwei Tu

¹,

Wei Zheng

¹,

Lin Hu

^2,* and

Qianwang Chen

^1,2,*

¹

Hefei National Research Center for Physical Sciences at the Microscale and Department of Materials Science & Engineering, University of Science and Technology of China, Hefei 230026, China

²

The High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China

^*

Authors to whom correspondence should be addressed.

Magnetochemistry 2023, 9(3), 65; https://doi.org/10.3390/magnetochemistry9030065

Submission received: 29 January 2023 / Revised: 18 February 2023 / Accepted: 23 February 2023 / Published: 26 February 2023

(This article belongs to the Special Issue Study on the Growth and Performance of Materials under Magnetic Field)

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Abstract

As an external field, a magnetic field can change the electrocatalytic activity of catalysts through various effects. Among them, electron spin polarization on the catalyst surface has attracted much attention. Herein, we investigate the sensitive response behavior of a Cu₂O nanocubes to an in situ magnetic field. Under a 3 T strong magnetic field, the total transferred electron quantity in IT test (−1.1 V_RHE) and the current density in the polarization curve increase by 28.7% and 54.7%, respectively, while the onset potential decreases significantly by 114 mV. Moreover, it was found that product selectivity was also altered by the magnetic field. The Faraday efficiency of C₁ increases substantially, along with the inhibition of C₂₊ reaction paths and the HER. Our experimental results and DFT calculation demonstrate that a hybrid magnetic effect accelerates the CO₂RR kinetic and generates spin polarization of the catalyst surface. The polarized surface changes the binding energy of *OCHO/*COOH and inhibits singlet C–C coupling, which restrains the C₂₊ reduction path and thus more CO₂ is reduced to HCOOH.

Keywords: CO₂RR; magnetic field effect; Cu-based catalysts; spin polarization

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MDPI and ACS Style

Wang, P.; Qu, Y.; Meng, X.; Tu, J.; Zheng, W.; Hu, L.; Chen, Q. A Strong Magnetic Field Alters the Activity and Selectivity of the CO₂RR by Restraining C–C Coupling. Magnetochemistry 2023, 9, 65. https://doi.org/10.3390/magnetochemistry9030065

AMA Style

Wang P, Qu Y, Meng X, Tu J, Zheng W, Hu L, Chen Q. A Strong Magnetic Field Alters the Activity and Selectivity of the CO₂RR by Restraining C–C Coupling. Magnetochemistry. 2023; 9(3):65. https://doi.org/10.3390/magnetochemistry9030065

Chicago/Turabian Style

Wang, Peichen, Yafei Qu, Xiangfu Meng, Jinwei Tu, Wei Zheng, Lin Hu, and Qianwang Chen. 2023. "A Strong Magnetic Field Alters the Activity and Selectivity of the CO₂RR by Restraining C–C Coupling" Magnetochemistry 9, no. 3: 65. https://doi.org/10.3390/magnetochemistry9030065

APA Style

Wang, P., Qu, Y., Meng, X., Tu, J., Zheng, W., Hu, L., & Chen, Q. (2023). A Strong Magnetic Field Alters the Activity and Selectivity of the CO₂RR by Restraining C–C Coupling. Magnetochemistry, 9(3), 65. https://doi.org/10.3390/magnetochemistry9030065

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A Strong Magnetic Field Alters the Activity and Selectivity of the CO₂RR by Restraining C–C Coupling

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