Boosting oxygen transport through mitigating the interaction between Pt and ionomer in proton exchange membrane fuel cell

Sun，Fengman1,2,3; Liu，Haijun1,2,3; Chen，Ming2,3; Wang，Haijiang2,3

2023

10.1016/j.jpowsour.2022.232240

JOURNAL OF POWER SOURCES   Impact Factor & Quartile

0378-7753

1873-2755

The key to operating low-cost and high-power proton exchange membrane fuel cell (PEMFC) is reducing local oxygen transport resistance (R) from Pt/ionomer interface in cathode with low Pt loading. Herein, we design a high-oxygen mass-transfer Pt/ionomer interface via chemical modification of Pt/C catalyst with 1-Hexadecanethiol (CSH) by self-assembled monolayers (SAMs) method. With a concentration of 0.3 mM, CSH is selectively adsorbed on Pt nanoparticles and constructs a hydrophobic Pt/C surface, which can effectively reduce. -SOH density around Pt active sites and the specific Pt/ionomer interface is obtained after CSH is removed by in situ electrochemical oxidation. Consequently, compared with the performance of membrane electrode assembly (MEA) from unmodified catalyst, the voltage of CSH-modified MEA increases by 45 and 82 mV, respectively, at 1500 and 2000 mA cm at RH 100%. The decrease in oxygen transport resistance plays a key role in improving polarization performance, relative to the increase in H transport resistance. Moreover, according to limiting current density method, the reduced R from Pt/ionomer interface is the essential reason for the improved oxygen transport. In general, this work highlights a promising method to boost oxygen transport and enhance performance of PEMFC through mitigating the interaction between Pt and ionomer.

Membrane electrode assembly Oxygen transport Proton exchange membrane fuel cell Pt/C catalyst Pt/ionomer interface

EI ; SCI

English

Corresponding

Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06N500];

Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000880756700005

ELSEVIER

20224413032199

Catalysts ; Chemical modification ; Electrochemical oxidation ; Electrodes ; Ion exchange membranes ; Mass transfer ; Oxygen ; Platinum ; Proton exchange membrane fuel cells (PEMFC)

Precious Metals:547.1 ; Mass Transfer:641.3 ; Fuel Cells:702.2 ; Electrochemistry:801.4.1 ; Chemical Plants and Equipment:802.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Polymers:815.1.1

MATERIALS SCIENCE

2-s2.0-85140713209

Scopus

1.Harbin Institute of Technology,Harbin,150001,China
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Guangdong Provincial Key Laboratory of Energy Materials for Electric Power,Southern University of Science and Technology,Shenzhen,518055,China

Sun，Fengman,Liu，Haijun,Chen，Ming,et al. Boosting oxygen transport through mitigating the interaction between Pt and ionomer in proton exchange membrane fuel cell[J]. JOURNAL OF POWER SOURCES,2023,553.

Sun，Fengman,Liu，Haijun,Chen，Ming,&Wang，Haijiang.(2023).Boosting oxygen transport through mitigating the interaction between Pt and ionomer in proton exchange membrane fuel cell.JOURNAL OF POWER SOURCES,553.

Sun，Fengman,et al."Boosting oxygen transport through mitigating the interaction between Pt and ionomer in proton exchange membrane fuel cell".JOURNAL OF POWER SOURCES 553(2023).