Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (7): 1680-1686.DOI: 10.1016/S1872-2067(21)63999-2

• Special column on catalytic conversion of CO 2 Previous Articles     Next Articles

Regulating Pd-catalysis for electrocatalytic CO2 reduction to formate via intermetallic PdBi nanosheets

Linfeng Xiea,, Xuan Liua,, Fanyang Huangb, Jiashun Lianga, Jianyun Liua, Tanyuan Wanga, Liming Yangc, Ruiguo Caob, Qing Lia,*()   

  1. aState Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
    bKey Laboratory of Materials for Energy Conversion Chinese Academy of Science (CAS), Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China
    cSchool of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
  • Received:2021-09-28 Accepted:2021-12-07 Online:2022-07-18 Published:2022-05-20
  • Contact: Qing Li
  • About author:First author contact:

    Contributed equally to this work.

  • Supported by:
    National Nature Science Foundation of China(22122202);National Nature Science Foundation of China(21972051);Fundamental Research Funds for the Central Universities(20121yjscxcy021);Fundamental Research Funds for the Central Universities(20121yjscxcy030)


Electrocatalytic CO2 reduction plays an important role in the reduction of the CO2 concentration in atmosphere and consequently the mitigation of greenhouse effects. Pd has been extensively investigated as an electrocatalyst for the CO2 reduction to formate, which is an important raw material in the production of organic chemicals. However, the low selectivity and competitive reaction (hydrogen evolution reaction (HER)) have hindered the performance of monometallic Pd catalysts. In this paper, intermetallic PdBi nanosheets (NSs) are prepared for efficient CO2 reduction to formate. The highest Faradaic efficiency (FE) of formate on fully ordered PdBi NSs reaches 91.9% at -1.0 V vs. RHE, which outperforms that of the disordered PdBi and pure Pd catalysts. Density functional theory calculations suggest that compared to disordered PdBi NSs, the ordered structure can decrease the free energy barrier of *OCHO (a key intermediate of formate formation) and inhibit H2 evolution as well, thereby enhancing the activity and selectivity for formate production.

Key words: CO2 reduction, Electrocatalysis, Formate, Palladium, Intermetallic compound, Nanosheet