钯金-氧化锰/碳上高效的电催化甲酸氧化反应
Efficient electrocatalytic formic acid oxidation over PdAu-manganese oxide/carbon.
作者信息
Zhu Yihui, Pan Yu, Zhu Yihua, Jiang Hongliang, Shen Jianhua, Li Chunzhong
机构信息
Shanghai Engineering Research Center of Hierarchical Nanomaterials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
Shanghai Engineering Research Center of Hierarchical Nanomaterials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
出版信息
J Colloid Interface Sci. 2021 Jul;593:244-250. doi: 10.1016/j.jcis.2021.02.110. Epub 2021 Mar 9.
Developing high efficient Palladium-metal-based electrocatalysts is of great significance for formic acid oxidation (FAO) reaction. Here, we experimentally synthesize PdAu alloy composited with MnOx electrocatalyst (PdAu-MnOx/C) and illustrate its remarkable FAO performance. By virtue of theory studies, we find that Pd-Au bridges have superior adsorption ability towards HCOO* and oxygen vacancies in MnOx make HCOO* formation from HCOOH easier, synergistically lead to the outstanding FAO performance with specific activity and mass activity of 19.0 mA cm and 4539 mA mg respectively, which are 2.6 times and 3.5 times higher than commercial Pd/C. This work shed some light toward development of high-performance Pd-based electrocatalysts for FAO.
开发高效的钯基金属电催化剂对于甲酸氧化（FAO）反应具有重要意义。在此，我们通过实验合成了与MnOₓ电催化剂复合的PdAu合金（PdAu-MnOₓ/C），并阐述了其卓越的FAO性能。通过理论研究，我们发现Pd-Au桥对HCOO具有优异的吸附能力，并且MnOₓ中的氧空位使HCOOH更容易形成HCOO，协同导致了出色的FAO性能，其比活性和质量活性分别为19.0 mA cm⁻²和4539 mA mg⁻¹，分别比商业Pd/C高2.6倍和3.5倍。这项工作为开发用于FAO的高性能钯基电催化剂提供了一些启示。
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