Details

Autor(en) / Beteiligte

• Liang, Zhong
• Song, Lianpeng
• Jiang, Yong
• Liu, Jincheng
• Zhang, Yabin
• Zhang, Qian
• Yan, Chun‐Hua
• Du, Yaping

Titel

Penta‐Coordinated Y Sites Modulated Single Bi Sites for Promoted Selectivity of Electrochemical CO2 Reduction

Ist Teil von

• Advanced functional materials, 2024-02, Vol.34 (9), p.n/a

Ort / Verlag

Hoboken: Wiley Subscription Services, Inc

Erscheinungsjahr

2024

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• Atomically dispersed catalysts with two active sites have attracted attention in recent years. The two different sites may act synergistically in catalytic reactions or one site as active site and another regulates it. In this work, rare earth (RE)‐based single‐atom combo catalyst BiY/CN (with Y penta‐coordinated) is synthesized and characterized carefully for electrochemical reduction of CO2 to formic acid for the first time. The state of active Bi and Y species in the prepared catalyst is proved by the extended X‐ray absorption fine structure spectra and aberration‐corrected high‐angle annular dark field scanning transmission electron microscopy. The comprehensive experimental results and density functional theory calculations show Y sites covered by hydroxyls not only avoid being poisoned by *HCO2 at working conditions, but also serve as a spectator to affect the charge state of Bi sites, promoting performance by facilitating the transformation of *HCO2 intermediate to HCOOH. This work provides a new perspective on RE elements in electrocatalytic carbon dioxide reactions in future studies. A novel atomically dispersed BiY/CN for CO2 reduction reaction possesses a high FE(HCOOH) (Faradaic efficiency of HCOOH) of 83% at −1.10 V versus reversible hydrogen electrode. The high FE(HCOOH) is derived from the penta‐coordinated Y atoms regulation of the electronic structure and catalytic performance of Bi site during CO2RR and promotes the conversion of key intermediates (*HCO2→HCOOH).