Modulating p‐Orbital of Bismuth Nanosheet by Nickel Doping for Electrocatalytic Carbon Dioxide Reduction Reaction

• DOI: 10.1002/cssc.202200752
• Publication Date: 2022-05-27T02:53:20Z
• Authors: Helei Wei; Aidong Tan; Zhipeng Xiang; Jie Zhang; Jinhua Piao; Zhenxing Liang; Kai Wan; Zhiyong Fu
• Keywords: Nanosheet

Electrochemical reduction of CO2 (CO2 RR) to value-added chemicals is an effective way harvest renewable energy and utilize carbon dioxide. However, the electrocatalysts for RR suffer from insufficient activity selectivity due limitation activation. In this work, a Ni-doped Bi nanosheet (Ni@Bi-NS) electrocatalyst synthesized electrochemical HCOOH. Physicochemical characterization methods are extensively used investigate composition structure materials. results reveal that production HCOOH, obtained Ni@Bi-NS exhibits equivalent current density 51.12 mA cm-2 at -1.10 V, which much higher than pure Bi-NS (18.00 V). A high Faradaic efficiency over 92.0 % HCOOH achieved in wide potential range -0.80 particularly, highest 98.4 -0.90 V. Both experimental theoretical superior attributed doping effect Ni on nanosheet. The functional theory calculation reveals upon doping, charge transferred adjacent atoms, shifts p-orbital electronic states towards Fermi level. resultant strong orbital hybridization between π* orbitals facilitates formation *OCHO intermediates favors its This work provides strategy develop active selective by modulating state.