Thermodynamic Part Management of Cu-Sn Alloy Electrocatalysts for Selective CO2 Discount

Within the electrochemical CO₂ discount response (CO₂RR), Cu alloy electrocatalysts can management the CO₂RR selectivity by modulating the intermediate binding power. Right here, we report the thermodynamic-based Cu-Sn bimetallic section management in heterogeneous catalysts for selective CO₂ conversion. Ranging from the thermodynamic understanding about Cu-Sn bimetallic compounds, we established the precise processing window for Cu-Sn bimetallic section management. To modulate the Cu-Sn bimetallic phases, we managed the oxygen partial strain (pO₂) throughout the calcination of electrospun Cu and Sn ions-incorporated nanofibers (NFs). This resulted within the formation of CuO-SnO₂ NFs (full oxidation), Cu-SnO₂ NFs (selective discount), Cu₃Sn/CNFs, Cu₄₁Sn₁₁/CNFs, and Cu₆Sn₅/CNFs (full discount). Within the CO₂RR, CuO-SnO₂ NFs exhibited formate (HCOO^–) manufacturing and Cu-SnO₂ NFs confirmed carbon monoxide (CO) manufacturing with the Faradaic effectivity (FE) of 65.3% at -0.99 V (vs RHE) and 59.1% at -0.89 V (vs RHE) respectively. Cu-rich Cu₄₁Sn₁₁/CNFs and Cu₃Sn/CNFs enhanced the methane (CH₄) manufacturing with the FE of 39.1% at -1.36 V (vs RHE) and 34.7% at -1.5 V (vs RHE). Nevertheless, Sn-rich Cu₆Sn₅/CNFs produced HCOO^– with the FE of 58.6% at -2.31 V (vs RHE). This research suggests the methodology for bimetallic catalyst design and steering the CO₂RR pathway by controlling the energetic websites of Cu-Sn alloys.