Constructing highly durable reversal-tolerant anodes via integrating high-surface-area Ti4O7 supported Pt and Ir@IrOx for proton exchange membrane fuel cells

Li，Zheng1,2,3; Mu，Yongbiao2,3; Zhang，Qing2,3; Huang，Haodong2,3; Wei，Xianbin4; Yang，Lin2,3; Wang，Guanxiong5; Zhao，Tianshou1,2,3; Wu，Gang6; Zeng，Lin2,3

2024-01-15

10.1039/d3ee03921h

Energy and Environmental Science   影响因子和分区

1754-5692

1754-5706

Fuel starvation during the fuel cell operation inevitably leads to high potential anodes, which causes carbon corrosion and catalyst layer collapse and poses a challenge to the durability of proton exchange membrane fuel cells. Herein, TiO with a high specific surface area was synthesized facilely and utilized to replace carbon as the anode catalyst support. Previously, the initial performance of the TiO-supported catalyst was obstructed by the disadvantaged electrical conductivity of TiO. This work obtains a comparable polarization performance after optimizing the TiO-supported anode catalyst layer parameters by shortening the electron transfer pathway and increasing metal coverage. Meanwhile, reversal-tolerant anodes (RTAs) were fabricated by the traditional IrO addition and core-shell structured Ir@IrO to validate the applicability of the TiO support. Typically, the Ir@IrO/Pt/TiO-fabricated RTA with low Ir loading displays an approximately ten times longer reversal time (6 hours) and two orders of magnitude lower degradation rate than a conventional carbon-supported counterpart. The degradation origin of the TiO-supported anodes was also studied by postmortem characterizations, pointing to the Pt oxidation caused by the formation of TiO thin layers on the Pt surface. The study aims to promote the development of carbon-free anodes and provide a bright perspective for practical high-performance, low-degradation, and cost-friendly RTA fabrication.

SCI ; EI

英语

通讯

2-s2.0-85183930161

Scopus

1.Department of Mechanical and Aerospace Engineering,The Hong Kong University of Science and Technology,Kowloon,Clear Water Bay,Hong Kong
2.Shenzhen Key Laboratory of Advanced Energy Storage,Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.SUSTech Energy Institute for Carbon Neutrality,Southern University of Science and Technology,Shenzhen,518055,China
4.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
5.Shenzhen Academy of Aerospace Technology,Shenzhen,518057,China
6.Department of Chemical and Biological Engineering,University at Buffalo,The State University of New York,Buffalo,14260,United States

Li，Zheng,Mu，Yongbiao,Zhang，Qing,et al. Constructing highly durable reversal-tolerant anodes via integrating high-surface-area Ti4O7 supported Pt and Ir@IrOx for proton exchange membrane fuel cells[J]. Energy and Environmental Science,2024,12.

Li，Zheng.,Mu，Yongbiao.,Zhang，Qing.,Huang，Haodong.,Wei，Xianbin.,...&Zeng，Lin.(2024).Constructing highly durable reversal-tolerant anodes via integrating high-surface-area Ti4O7 supported Pt and Ir@IrOx for proton exchange membrane fuel cells.Energy and Environmental Science,12.

Li，Zheng,et al."Constructing highly durable reversal-tolerant anodes via integrating high-surface-area Ti4O7 supported Pt and Ir@IrOx for proton exchange membrane fuel cells".Energy and Environmental Science 12(2024).