Self-Supporting Bi–Sb Bimetallic Nanoleaf for Electrochemical Synthesis of Formate by Highly Selective CO2 Reduction

• DOI: 10.1021/acsami.2c20593
• Publication Date: 2023-01-27T19:42:49Z
• Authors: Chan Yang; Yarong Hu; Sanxiu Li; Qun Huang; Juan Peng
• Keywords: Bimetallic strip

Electrocatalytic reduction of CO2 into valuable fuels and chemical feedstocks in a sustainable environmentally friendly manner is an ideal way to mitigate climate change environmental problems. Here, we fabricated series self-supporting Bi-Sb bimetallic nanoleaves on carbon paper (CP) by facile electrodeposition method. The synergistic effect Bi Sb components the electronic structure lead high formate selectivity excellent stability electrochemical reaction (CO2RR). Specifically, Bi-Sb/CP electrode achieved Faradic efficiency (FEformate, 88.30%) at -0.9 V (vs RHE). FE remained above 80% broad potential range -1.3 RHE), while FECO was suppressed below 6%. Density functional theory calculations showed that Bi(012)-Sb reduced adsorption energy *OCHO intermediate promoted mass transfer charges. optimally adsorbed production inhibiting CO product pathway, thereby enhancing synthesis. Moreover, CO2RR performance also investigated flow-cell system evaluate its for industrial applications. catalyst can maintain steady current density 160 mA/cm2 -1.2 RHE) 25 h continuous electrolysis. Such generation flow cells has rarely been reported previous studies. This work offers new insights development electrodes reduction.