@article{35899,
  author = {Sarah A Berlinger and Anamika Chowdhury and Tim Van Cleve and Aaron He and Nicholas Dagan and Kenneth C Neyerlin and Bryan D McCloskey and Clayton J Radke and Adam Z Weber},
  title = {Impact of Platinum Primary Particle Loading on Fuel Cell Performance: Insights from Catalyst/Ionomer Ink Interactions},
  abstract = {<p><span>A variety of electrochemical energy conversion technologies, including fuel cells, rely on solution-processing techniques (via inks) to form their catalyst layers (CLs). The CLs are heterogeneous structures, often with uneven ion-conducting polymer (ionomer) coverage and underutilized catalysts. Various platinum-supported-on-carbon colloidal catalyst particles are used, but little is known about how or why changing the primary particle loading (PPL, or the weight fraction of platinum of the carbon{\textendash}platinum catalyst particles) impacts performance. By investigating the CL gas-transport resistance and zeta (ζ)-potentials of the corresponding inks as a function of PPL, a direct correlation between the CL high current density performance and ink ζ-potential is observed. This correlation stems from likely changes in ionomer distributions and catalyst{\textendash}particle agglomeration as a function of PPL, as revealed by pH, ζ-potential, and impedance measurements. These findings are critical to unraveling the ionomer distribution heterogeneity in ink-based CLs and enabling enhanced Pt utilization and improved device performance for fuel cells and related electrochemical devices.</span></p>},
  year = {2022},
  booktitle = {ACS Applied Materials \& Interfaces},
  journal = {ACS Applied Materials \& Interfaces},
  series = {ACS Applied Materials \& Interfaces},
  volume = {14},
  pages = {36731 - 36740},
  month = {08/2022},
  issn = {1944-8244},
  url = {https://pubs.acs.org/doi/10.1021/acsami.2c10499},
  doi = {10.1021/acsami.2c10499},
  language = {eng},
}