The difference of the ionomer–catalyst interfaces for poly(aryl piperidinium)hydroxide exchange membrane fuel cells and proton exchange membrane fuel cells  

作　　者：Xuerui Liu Xingdong Wang Chanyu Zhang Yun Cai Bowen Chen Dongyue Xin Xiaoxiao Jin Wei Zhu Klaus Wippermann Hui Li Ruiyu Li Zhongbin Zhuang 

机构地区：[1]Beijing Advanced Innovation Center for Soft Matter Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China [2]State Key Lab of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China [3]Research Institute of Petroleum Processing,SINOPEC,Beijing 100083,China [4]DeepHytec Co.,Ltd.,Shenzhen 518118,China [5]Institute of Energy and Climate Research(IEK-14),Forschungszentrum Jülich GmbH,Jülich 52425,Germany [6]Beijing Key Laboratory of Energy Environmental Catalysis,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Nano Research》2024年第7期6102-6110,共9页纳米研究（英文版）

基　　金：financially supported by Beijing Natural Science Foundation(No.Z210016).

摘　　要：The microstructures of the ionomer–catalyst interfaces in the catalyst layers are important for the fuel cell performance because they determine the distribution of the active triple-phase boundaries.Here,we investigate the ionomer–catalyst interactions in hydroxide exchange membrane fuel cells(HEMFCs)using poly(aryl piperidinium)and compare them with proton exchange membrane fuel cells(PEMFCs).It is found that different catalyst layer microstructures are between the two types of fuel cell.The ionomer/carbon(I/C)ratio does not have a remarkable impact on the HEMFC performance,while it has a strong impact on the PEMFC performance,indicating the weaker interaction between the HEMFC ionomer and catalyst.Molecular dynamics simulations demonstrate that the HEMFC ionomer tends to distribute on the carbon support,unlike the PEMFC ionomer,which heavily covers the Pt nanoparticles.These results suggest that the poisoning effect of the ionomer on the catalyst is much weaker in HEMFCs,and the improved ionomer/catalyst interaction is beneficial for the HEMFC performances.

关 键 词：hydroxide exchange membrane fuel cells CATALYSTS IONOMER oxygen reduction reaction INTERFACES 

分 类 号：O64[理学—物理化学]