Budner Bogusław, Tokarz Wojciech, Dyjak Sławomir, Czerwiński Andrzej, Bartosewicz Bartosz, Jankiewicz Bartłomiej
Institute of Optoelectronics, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw, Poland.
Łukasiewicz Research Network - Mościcki Industrial Chemistry Research Institute (ICRI), 8 Rydygiera Str., 01-793 Warsaw, Poland.
Beilstein J Nanotechnol. 2023 Feb 2;14:190-204. doi: 10.3762/bjnano.14.19. eCollection 2023.
The research undertaken aimed to develop an efficient Pt-based catalyst for polymer electrolyte membrane fuel cells (PEMFCs) by using a cost-effective and efficient physical method to deposit platinum nanoparticles (PtNPs) on carbon supports directly from the platinum target. The method developed avoids the chemical functionalization of the carbon substrate and the chemical synthesis of PtNPs during catalyst fabrication. Platinum was deposited on carbon particles at room temperature using a pulsed laser deposition (PLD) system equipped with an ArF excimer laser (λ = 193 nm). The uniform deposition of PtNPs on carbon supports was achieved thanks to a specially designed electromechanical system that mixed the carbon support particles during platinum deposition. In the studies, Vulcan XC-72R carbon black powder, a popular material used as support in the anodes and cathodes of PEMFCs, and a porous carbon material with a high degree of graphitization were used as carbon supports. The best electrochemical measurement results were obtained for Pt deposited on Vulcan XC-72R. The peak power density measured for this material in a membrane electrode assembly (MEA) of a PEMFC (fed with H/Air) was 0.41 W/cm, which is a good result compared to 0.57 W/cm obtained for commercial 20% Pt Vulcan XC-72R. This result was achieved with three times less Pt catalyst on the carbon support compared to the commercial catalyst, which means that a higher catalyst utilization factor was achieved.
所开展的研究旨在通过一种经济高效的物理方法，直接从铂靶将铂纳米颗粒（PtNPs）沉积在碳载体上，从而开发出一种用于聚合物电解质膜燃料电池（PEMFC）的高效铂基催化剂。所开发的方法避免了在催化剂制备过程中对碳载体进行化学功能化以及PtNPs的化学合成。使用配备有ArF准分子激光器（λ = 193 nm）的脉冲激光沉积（PLD）系统，在室温下将铂沉积在碳颗粒上。由于在铂沉积过程中采用了专门设计的机电系统来混合碳载体颗粒，从而实现了PtNPs在碳载体上的均匀沉积。在这些研究中，Vulcan XC - 72R炭黑粉末（一种在PEMFC的阳极和阴极中用作载体的常用材料）以及一种具有高度石墨化的多孔碳材料被用作碳载体。沉积在Vulcan XC - 72R上的铂获得了最佳的电化学测量结果。在PEMFC的膜电极组件（MEA）中（通入氢气/空气），该材料测得的峰值功率密度为0.41 W/cm²，与商用20% Pt Vulcan XC - 72R获得的0.57 W/cm²相比，这是一个不错的结果。与商用催化剂相比，在碳载体上使用的Pt催化剂减少了三倍，这意味着实现了更高的催化剂利用率。
