Details

Autor(en) / Beteiligte

• Zhao, Yuying
• Yuan, Qixin
• Xu, Ruting
• Zhang, Chenhao
• Sun, Kang
• Wang, Ao
• Zhang, Anqi
• Wang, Ziyun
• Jiang, Jianchun
• Fan, Mengmeng

Titel

Boosting electrochemical conversion of CO2 to ethanol through the confinement of pyridinic N-B layer on copper nanoparticles

Ist Teil von

• Applied catalysis. B, Environmental, 2024-10, Vol.355, p.124168, Article 124168

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Developing efficient electrocatalysts for CO2 reduction has gained significant attention in the field of sustainable energy, especially the Cu-based catalysts for CO2 conversion to valuable alcohols. In this study, we developed Cu nanoparticles supported on pyridinic N-B doped graphene nanoribbons/amorphous carbon (Cu/BNC-1) as an electrocatalyst for CO2 reduction, exhibiting substantially improved ethanol (EtOH) conversion rate in terms of activity, selectivity, and stability. The Cu/BNC-1 achieved a remarkable 58.64 % Faradaic efficiency (FE) for producing EtOH at −1.0 V vs. RHE with a current density of 20.4 mA cm−2 in 0.5 M KHCO3 electrolyte. In-situ Raman, FT-IR, and density functional theory (DFT) calculations demonstrated that the high C2+ product selectivity of Cu/BNC-1 attributed to the pyridinic N-B modulation, lowering the CO dimerization barrier. Moreover, the synergistic confinement effect of Cu and BNC can stabilize the C-O bond of the *HOCCH intermediate, thereby increasing the yield of EtOH. [Display omitted] •Cu nanoparticles with B, N co-doped graphene nanoribbons/amorphous carbon was fabricated.•The catalyst showed stable 58 % FE under 20.4 mAcm−2 during 24 h testing in CO2RR to ethanol.•The overall catalytic performance of Cu/BNC-1 was superior to other Cu-based catalysts.•This research highlighted the synergistic effect of Cu and BNC materials.•Pyridinic N-B modulation in Cu/BNC-1 reduced the CO dimerization barrier.