Physicochemical Properties of ECS Supports and Pt/ECS Catalysts
Physicochemical Properties of ECS Supports and Pt/ECS Catalysts
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ECS 载体和 Pt/ECS 催化剂的物理化学性质
DOI：
10.1021/acsaem.1c01392
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发表时间：
2021
影响因子：
6.4
通讯作者：
Pylypenko, Svitlana
中科院分区：
文献类型：
--
作者：
Dzara, Michael J.;Godoy, Andres O.;Odgaard, Madeleine;Zulevi, Barr;Serov, Alexey;Jankovic, Jasna;Pylypenko, Svitlana
随着聚合物电解质膜燃料电池技术在运输和能源领域的使用增加，仍然需要生产可调的高性能氧还原反应（ORR）催化剂。这项工作代表了第一次详细调查的市售介孔氮官能化的碳载体与可调性能（工程碳载体，ECS）和ORR催化剂的铂纳米粒子（Pt-NPs）的基础上，这些ECS材料由Pajarito粉末有限责任公司生产。研究了具有可调浓度的氧和氮官能团以及不同碳石墨化水平的ECS材料。首先，这些Pt/ECS催化剂的物理化学性质，以及他们的裸，无Pt ECS模拟碳载体材料的研究，通过组合的表征技术。这产生了一个全面的物理化学性质的目录，包括表面积，表面掺杂剂（氮和氧）的浓度，石墨含量，形态和Pt-NP粒度分布的评估。然后，在低相对湿度条件下测试的膜电极组件（MEA）中的三种不同的Pt/ECS催化剂的ORR性能作为可以用这些材料获得的性能的一个例子。所有催化剂在低相对湿度下都表现出非常有前途的ORR性能，在0.6 V下实现1.8和1.3 A/cm 2之间的电流密度。这项工作表明，通过Pajarito Powders，LLC开发的VariPore合成技术实现的具有工程形态和组成的碳载体是一个有前途的平台，可以生产具有可调性能的载体和催化剂，用于各种应用。
As polymer electrolyte membrane fuel cell technologies see increased use in the transportation and energy sectors, there continues to be a need to produce tunable, high-performance oxygen reduction reaction (ORR) catalysts. This work represents the first detailed investigation of commercially available mesoporous nitrogen-functionalized carbon supports with tunable properties (Engineered Carbon Supports, ECS) and ORR catalysts based on platinum nanoparticles (Pt-NPs) supported on these ECS materials produced by Pajarito Powders, LLC. The ECS materials with tunable concentrations of oxygen and nitrogen functional groups and varied carbon graphitization levels were investigated. First, the physicochemical properties of these Pt/ECS catalysts are presented, alongside their bare, Pt-free ECS analogue carbon support materials as investigated through a combination of characterization techniques. This yields a comprehensive catalog of physicochemical properties, including surface area, the concentration of surface dopants (nitrogen and oxygen), evaluation of graphitic content, morphology, and Pt-NP particle size distribution. Then, the ORR performance of the three different Pt/ECS catalysts in membrane electrode assemblies (MEAs) tested under low-relative-humidity conditions is presented as an example of the performance that can be obtained with these materials. All catalysts demonstrated very promising ORR performance at low relative humidity, achieving current densities between 1.8 and 1.3 A/cm2at 0.6 V. This work demonstrates that carbon supports with engineered morphologies and compositions achieved through the VariPore synthetic technology developed by Pajarito Powders, LLC are a promising platform to produce supports and catalysts with tunable properties for a variety of applications.
影响因子：
2.8
作者：
K. Sultana;D. Worku;M. Hossain;S. Ilias
通讯作者：
K. Sultana;D. Worku;M. Hossain;S. Ilias
PEM 燃料电池用介孔碳载体的腐蚀研究
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
F. Forouzandeh;Dustin Banham;F. Feng;Xiaoan Li;S. Ye;V. Birss
通讯作者：
V. Birss
影响因子：
16.6
作者：
Garlyyev, Batyr;Kratzl, Kathrin;Fischer, Roland A.
通讯作者：
Fischer, Roland A.