李彦光教授课题组及其合作者在Angew. Chem. Int. Ed. 上发表论文

Phase-Dependent Electrocatalytic CO₂ Reduction on Pd₃Bi Nanocrystals

作者：

Lin Jia,^1,+ Mingzi Sun,^2,+ Jie Xu,^1,+ Xuan Zhao,¹ Rui Zhou,¹ Binbin Pan,¹ Lu Wang,¹ Na Han,¹ Bolong Huang,^2,* and Yanguang Li^1,*

单位：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123 (China)

²Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR (China)

摘要：

Alloying is a general strategy for modulating the electronic structures of catalyst materials. Compared to more common solid–solution alloys, intermetallic alloys feature well-defined atomic arrangements and provide the unique platform for studying the structure-performance correlations. It is, unfortunately, synthetically challenging to prepare the nanostructures of intermetallic alloys for catalysis research. In this contribution, we prepare intermetallic Pd3Bi nanocrystals of a uniform size via a facile solvothermal method. These nanocrystals can phase-transform into solid solution alloy via thermal annealing while retaining a similar composition and size. In 0.1 M KHCO₃ aqueous solution, the intermetallic Pd₃Bi can selectively reduce CO₂ to formate with high selectivity (≈100%) and stability even at <-0.35 V versus reversible hydrogen electrode, whereas the solid solution alloy has limited formate selectivity of < 60%. Such unique phase-dependence is understood via theoretical simulations showing that the crystallographic ordering of Pd and Bi atoms within intermetallic alloys can suppress CO poisoning and enhance the *OCHO adsorption during electrochemical CO₂ reduction to formate.

影响因子：

12.959

分区情况：

一区

链接：

https://doi.org/10.1002/anie.202109288