Kim Han Seul, Woo Seung Min, Kang Gyu Mi, You Sang-Hoon, Lee Sang-Seok, Park Subin, Park Jae-Hyun, Cho Yoonbin, Lee Kyung Rog, Lee Kug-Seung, Kim Yong-Tae, Yu Seung-Ho, Park Il-Kyu, Yoo Sung Jong
Hydrogen·Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.
Department of Chemical and Biological Engineering and Department of Battery-Smart Factory, Korea University, Seoul, 02841, Republic of Korea.
Small Methods. 2025 Jul 6:e2500481. doi: 10.1002/smtd.202500481.
Proton-exchange membrane fuel cells (PEMFCs) require durable and efficient catalyst supports to overcome the limitations of Pt-based catalysts and conventional low-crystalline carbon (LCC) supports, such as high cost, susceptibility to corrosion, and poor electrochemical durability. While highly crystalline carbon (HCC) offers improved stability, its intrinsic hydrophobicity and low defect density hinder Pt nanoparticles (NPs) nucleation and dispersion. In this study, a spin-on-dopant (SOD) approach is employed to synthesize phosphorus-incorporated HCC (HCC) providing stable anchoring sites that facilitate uniform Pt NPs distribution. Compared to commercial Pt/LCC, Pt/HCC exhibits enhanced thermal stability and oxidation resistance, with an oxidation onset temperature ≈90 °C higher. Accelerated durability tests reveal only a 2 mV half-wave potential shift and a minimal electrochemical surface area (ECSA) loss of 1.9% after 20 000 cycles, significantly lower than the 47.1% ECSA loss observed for Pt/LCC. Single-cell tests further confirm that Pt/HCC retains 92.4% of its initial power density, outperforming Pt/LCC. The incorporation of phosphorus improves Pt NPs stabilization on the superhydrophobic HCC surface, enhancing Pt utilization and long-term durability. This study provides valuable insights into the development of high-performance carbon supports for PEMFC catalysts.
质子交换膜燃料电池（PEMFCs）需要耐用且高效的催化剂载体，以克服基于铂的催化剂和传统低结晶度碳（LCC）载体的局限性，如成本高、易腐蚀和电化学耐久性差等问题。虽然高结晶度碳（HCC）具有更好的稳定性，但其固有的疏水性和低缺陷密度阻碍了铂纳米颗粒（NPs）的成核和分散。在本研究中，采用旋涂掺杂剂（SOD）方法合成了掺磷的HCC，其提供了稳定的锚固位点，有利于铂纳米颗粒均匀分布。与商业Pt/LCC相比，Pt/HCC表现出更高的热稳定性和抗氧化性，氧化起始温度约高90°C。加速耐久性测试表明，在20000次循环后，Pt/HCC的半波电位仅偏移2mV，电化学表面积（ECSA）损失最小，为1.9%，远低于Pt/LCC观察到的47.1%的ECSA损失。单电池测试进一步证实，Pt/HCC保留了其初始功率密度的92.4%，优于Pt/LCC。磷的掺入提高了铂纳米颗粒在超疏水HCC表面的稳定性，增强了铂的利用率和长期耐久性。本研究为PEMFC催化剂高性能碳载体的开发提供了有价值的见解。
