Authors
Peng Chen, Yuhang Wang, Haojian Lin, Shuaiwei Jiang, Xintao Ma, Qingshun Nian, Rong Zhang, Shaoce Zhang, Fengkun Hao, Fei Liu, Zhanxi Fan, Jun Fan, Chunyi Zhi
Published in
Angewandte Chemie (International ed. in English). Oct 24, 2026. Epub Oct 24, 2026.
Abstract
The industrialization of electrochemical CO2 reduction reaction for multi-carbon products synthesis is limited by HER competition, sluggish C─C coupling kinetics, and carbonate deposition. Through rational computational screening, we identify β-rhombohedral borophene oxide (β-rh. BO) as an ideal two-dimensional substrate to simultaneously overcome these bottlenecks. Evaluated in a flow cell with 1 M KOH electrolyte, the β-rh. BO-supported Cu (BO-Cu) demonstrates outstanding performance across an industrially relevant current density range of -700 to -1500 mA cm-2, achieving a peak C2+ Faradaic efficiency (FE) of 85.9% and a partial current density exceeding -1082 mA cm-2. Mechanistic studies reveal that β-rh. BO serves a role beyond an electron donor. Specifically, it redistributes hydrated K+ and alters the interfacial water structure, which not only suppresses HER by diverting proton transfer toward *CO hydrogenation rather than H2 evolution, but also enables the transformation of symmetric C─C coupling to asymmetric C─C coupling via modulating the charge distribution of intermediates. Furthermore, the introduction of β-rh. BO drastically reduces carbonate deposition. This work presents a novel multifunctional substrate that synergistically modulates the electronic structure, tailors interfacial water structure, and suppresses carbonate deposition, offering a new paradigm for the design of electrocatalysts for industrial CO2RR applications.
PMID:
42920349
Bibliographic data and abstract were imported from PubMed on 24 Oct 2026.
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