文献类型：期刊文献

英文题名：Well-designed internal electric field from nano-ferroelectrics promotes formic acid oxidation on Pd

作者：Luo, Guoming[1];Hu, Shuozhen[1];Niu, Dongfang[1];Sun, Shigang[2];Zhang, Xinsheng[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen, Peoples R China

年份：2022

卷号：14

期号：16

起止页码：6007

外文期刊名：NANOSCALE

收录：;EI(收录号：20221311858604);WOS:【SCI-EXPANDED(收录号:WOS:000767348000001)】；

基金：This work is financially supported by the National Natural Science Foundation of China (project 22005097), the State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, P.R. China (no. 201815), the Fundamental Research Funds for the Central Universities (no. 222201814008) (China), and the Open Project of State Key Laboratory of Chemical Engineering (no. SKL-ChE-18 C05) (China). The authors thank the Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization. The authors would like to thank the shiyanjia lab (www. shiyanjia.com) for the XPS test.

语种：英文

外文关键词：Formic acid fuel cells (FAFC) - Catalyst poisoning - Electric fields - Formic acid - Charge transfer - Silicate minerals - Palladium - Dissolution

摘要：Pd-Based catalysts are considered the most efficient catalysts in direct formic acid fuel cells. However, the poisoning and dissolution of Pd in acidic systems limit its commercialization. Here, we propose an all-in-one solution for the anti-dissolution and anti-poisoning properties of palladium. A novel structured catalyst, Pd nanoparticles embedded in a carbon layer internally decorated with tourmaline nanoparticles (TNPs), is proposed for formic acid oxidation (FAO). The internal electric field strength of the catalysts is readily regulated by controlling the amount of TNPs. Remarkably, the prepared catalyst exhibits as high as 3.9 times mass activity (905 A g(-1)) compared with the commercial Pd/C catalyst. The significant improvement in the electrocatalytic performance of the catalyst is mainly due to the polarized electric field of TNPs causing charge transfer from Pd to tourmaline, which weakens the O-H bond of HCOOH and the bond between Pd and COad. Another advantage brought by the internal polarized electric field is that it facilitates water dissociation to produce OHad, thereby improving the anti-poisoning ability of the catalyst in acidic media. Moreover, the firmly anchored Pd nanoparticles can avoid dissolution and agglomeration during long-term use. 80.2% mass activity remained after the accelerated durability test.