Positive direction of polarization-induced electric field improves formic acid electrooxidation on Pd  

作　　者：Shuozhen Hu Yunyun Cheng Guoming Luo Kai Huang Cheng Shi Jie Xu Cheng Lian Shigang Sun Xinsheng Zhang 

机构地区：[1]State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China [2]Shanghai Hydrogen Propulsion Technology Co.,Ltd.,Shanghai 201800,China [3]Shanghai Haizhiqing Energy Development Co.,Ltd.,Shanghai 200333,China [4]Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Functional Materials Research Laboratory,School of Materials Science and Engineering,Tongji University,Shanghai 201804,China [5]School of Materials Science and Engineering,Anhui University of Technology,Ma’anshan 243002,China [6]State Key Laboratory of Physical Chemistry of Solid Surfaces,Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China

出　　处：《Nano Research》2023年第8期10848-10856,共9页纳米研究（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.22005097).

摘　　要：Adjusting the adsorption energy of adsorbates on catalyst can directly regulate the catalytic performance and reaction pathways of heterogeneous catalysis.Herein,we report a novel strategy,introducing polarization-induced electric field(PIEF)with different directions,to manipulate the adsorption energy of intermediates and reaction pathway of formic acid electrooxidation on Pd.Tourmaline nanoparticles are applied as the PIEF provider,of which the direction is successfully controlled via aligning the dipoles in tourmaline in a strong external electric field.Experimental and theoretical results systematically reveal that positive PIEF leads to an electron-deficient state of Pd,reduced adsorption energy of COad,enhanced adsorption energy of*HCOOH and*OH,and promoted formate pathway of formic acid electrooxidation.Pd/TNP+/FTO,with the aid of positive PIEF,shows three-fold enhancement in the formic acid electrooxidation(4.74 mA·cm^(−2))with high durability and anti-poisoning ability compared with pristine Pd.This study leads a new route to design formic acid electrocatalysts and provides an understanding on how to control the adsorption energy of adsorbates on electrocatalysts by an internal electric field.

关 键 词：dipole-aligned tourmaline ferroelectric material polarization-induced electric field direction PALLADIUM adsorption energy formic acid oxidation mechanism 

分 类 号：O64[理学—物理化学]