首页|Ethylenediamine tetramethylenephosphonic acid boosting the electrocatalytic interface construct and proton transfer for high-temperature polymer electrolyte membrane fuel cells

Ethylenediamine tetramethylenephosphonic acid boosting the electrocatalytic interface construct and proton transfer for high-temperature polymer electrolyte membrane fuel cells

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High-temperature polymer electrolyte membrane fuel cells(HT-PEMFCs)show excellent application pro-spects due to its enhanced tolerance of hydrogen impurity.However,the sluggish electrode kinetics caused by its inefficient electrocatalytic interface and proton transfer severely restricts its performance.To overcome the sluggish electrode kinetics,the ethylenediamine tetramethylenephosphonic acid(EDTMPA)was successfully incorporated into the catalysts layer to regulate the phosphoric acid(PA)dis-tribution to boost the electrocatalytic reaction interface and proton transfer,thus increasing the output power and stability of HT-PEMFCs.The hydrophilic H2PO4-and electron donor N atom of EDTMPA could efficiently decrease the absorption of PA on the catalyst surface and facilitate proton transportation in the membrane electrode,as demonstrated by our experiments.The fuel cell assembled with the prepared membrane electrode shows a high reactivity of 1175 mW cm-2 and excellent stability,which is much better than the past reference report.The results of this work provide new insights into the utilization of small molecules with phosphate groups to enhance phosphate tolerance and proton conduction,and there is also a further improvement in the reactivity,durability,and utilization of the electrocatalysts in HT-PEMFCs.

Fuel cellsElectrocatalytic interfaceElectrocatalystsActivityPt

Dongcai Zhang、Yangyang Zhou、Yanwei Zhu、Shiqian Du、Gen Huang、Jiaqi Lin、Peng Long、Tehua Wang、Li Tao、Xian-Zhu Fu、Shuangyin Wang

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College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China

State Key Laboratory of Chem/Bio-Sensing and Chemometrics,Provincial Hunan Key Laboratory for Graphene Materials and Devices,College of Chemistry and Chemical Engineering,the National Supercomputer Centers in Changsha,Hunan University,Changsha 410082,Hunan,China

Shenzhen Research Institute Hunan University,Shenzhen 518000,Guangdong,China

College of Chemistry and Chemical Engineering,Jiangxi Science and Technology Normal University,Nanchang 330013,Jiangxi,China

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2024

10.1016/j.jechem.2024.07.040

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.99(12)