Volume 137, Issue 30 e202505843
Forschungsartikel

Selective Electrocatalytic Hydrodimerization of Acetylene to 1,3-Butadiene Over Neighboring Cu Dual Sites

Jun Bu

Jun Bu

State Key Laboratory of Solidification Processing and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072 P.R. China

Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology and School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129 P.R. China

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Xinyue Niu

Xinyue Niu

State Key Laboratory of Solidification Processing and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072 P.R. China

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Jinjin Li

Jinjin Li

State Key Laboratory of Solidification Processing and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072 P.R. China

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Rui Bai

Rui Bai

State Key Laboratory of Solidification Processing and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072 P.R. China

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Prof. Menglei Yuan

Corresponding Author

Prof. Menglei Yuan

State Key Laboratory of Solidification Processing and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072 P.R. China

E-mail: [email protected], [email protected]

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Prof. Jian Zhang

Corresponding Author

Prof. Jian Zhang

State Key Laboratory of Solidification Processing and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072 P.R. China

E-mail: [email protected], [email protected]

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First published: 19 May 2025

Abstract

Selective electrocatalytic hydrodimerization of acetylene to 1,3-butadiene is a promising alternative to the energy-intensive naphtha steam cracking route, but remains a grand challenge due to competitive acetylene semihydrogenation and oligomerization. Herein, we profoundly investigate the underpinning structure–performance correlations between diverse nuclear number of Cu sites and acetylene hydrodimerization over benchmark Cu-MOFs electrocatalysts. The operando electrochemical Raman and Fourier transform infrared spectroscopies and theoretical simulations together reveal that single Cu site and double Cu sites are favorable for acetylene semihydrogenation and hydrodimerization, respectively. The as-designed neighboring Cu dual sites in trinuclear Cu3-MOF enable the adsorption of acetylene, subsequent C–C coupling of *C2H2 and *C2H3 intermediates into 1,3-butadiene as well as the desorption of 1,3-butadiene. As a result, the trinuclear Cu3-MOF affords a 1,3-butadiene selectivity of 91% and a high 1,3-butadiene production rate of 64 mmol g−1 h−1, which is about 2-fold and 20-fold higher than Cu2-MOF and Cu1-MOF. This work not only provides profound insights into the electrocatalytic mechanism of acetylene hydrodimerization but also guides the rational design of high-activity electrocatalysts.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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