Guan Yue, Wu Si-Qian, Huang Hui-Zi, Zhu Zhejiaji, Tian Wenjing, Yin An-Xiang
Ministry of Education Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology Beijing 100081 (P. R. China).
Chem Asian J. 2024 Sep 2;19(17):e202400296. doi: 10.1002/asia.202400296. Epub 2024 Aug 5.
Formic acid (HCOOH) is a highly energy efficient product of the electrochemical CO reduction reaction (CORR). Bismuth-based catalysts have shown promise in the conversion of CO to formic acid, but there is still a great need for further improvement in selectivity and activity. Herein, we report the preparation of Bi nanosheets decorated by cerium oxide nanoparticles (CeO) with high Ce/Ce ratio and rich oxygen vacancies. The CeO nanoparticles affect the electronic structures of bismuth, enhance CO adsorption, and thus promote the CORR properties of Bi nanosheets. Compared with elemental Bi nanosheets, the hetero-structured CeO/Bi nanosheets exhibit much higher activity over a wide potential window, showing a current density of 16.1 mA cm with a Faradaic efficiency of 91.1% at -0.9 V vs. reversible hydrogen electrode.
甲酸（HCOOH）是电化学CO还原反应（CORR）的一种高能效产物。铋基催化剂在将CO转化为甲酸方面已显示出潜力，但在选择性和活性方面仍有很大的改进需求。在此，我们报道了由具有高Ce/Ce比和丰富氧空位的氧化铈纳米颗粒（CeO）修饰的铋纳米片的制备。CeO纳米颗粒影响铋的电子结构，增强CO吸附，从而促进铋纳米片的CORR性能。与单质铋纳米片相比，异质结构的CeO/Bi纳米片在很宽的电位窗口内表现出更高的活性，在相对于可逆氢电极-0.9 V时，电流密度为16.1 mA cm，法拉第效率为91.1%。
