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含混合氧化物复合载体铂对聚合物电解质膜（PEM）燃料电池的电催化性能

Electrocatalytic Properties of Mixed-Oxide-Containing Composite-Supported Platinum for Polymer Electrolyte Membrane (PEM) Fuel Cells.

作者信息

Ayyubov Ilgar, Tálas Emília, Salmanzade Khirdakhanim, Kuncser Andrei, Pászti Zoltán, Neațu Ștefan, Mirea Anca G, Florea Mihaela, Tompos András, Borbáth Irina

机构信息

Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network (ELKH), Magyar Tudósok körútja 2, H-1117 Budapest, Hungary.

Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary.

出版信息

Materials (Basel). 2022 May 20;15(10):3671. doi: 10.3390/ma15103671.

DOI:10.3390/ma15103671
PMID:35629708
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9148157/
Abstract

TiO-based mixed oxide-carbon composite supports have been suggested to provide enhanced stability for platinum (Pt) electrocatalysts in polymer electrolyte membrane (PEM) fuel cells. The addition of molybdenum (Mo) to the mixed oxide is known to increase the CO tolerance of the electrocatalyst. In this work Pt catalysts, supported on TiMoO-C composites with a 25/75 oxide/carbon mass ratio and prepared from different carbon materials (C: Vulcan XC-72, unmodified and functionalized Black Pearls 2000), were compared in the hydrogen oxidation reaction (HOR) and in the oxygen reduction reaction (ORR) with a commercial Pt/C reference catalyst in order to assess the influence of the support on the electrocatalytic behavior. Our aim was to perform electrochemical studies in preparation for fuel cell tests. The ORR kinetic parameters from the Koutecky-Levich plot suggested a four-electron transfer per oxygen molecule, resulting in HO. The similarity between the Tafel slopes suggested the same reaction mechanism for electrocatalysts supported by these composites. The HOR activity of the composite-supported electrocatalysts was independent of the type of carbonaceous material. A noticeable difference in the stability of the catalysts appeared only after 5000 polarization cycles; the Black Pearl-containing sample showed the highest stability.

摘要

基于TiO的混合氧化物-碳复合材料载体已被认为可为聚合物电解质膜（PEM）燃料电池中的铂（Pt）电催化剂提供更高的稳定性。已知向混合氧化物中添加钼（Mo）可提高电催化剂的一氧化碳耐受性。在这项工作中，将负载在TiMoO-C复合材料上、氧化物/碳质量比为25/75且由不同碳材料（C：Vulcan XC-72、未改性和功能化的黑珍珠2000）制备的Pt催化剂，在氢氧化反应（HOR）和氧还原反应（ORR）中与市售Pt/C参比催化剂进行比较，以评估载体对电催化行为的影响。我们的目的是进行电化学研究，为燃料电池测试做准备。来自Koutecky-Levich图的ORR动力学参数表明每个氧分子发生四电子转移，生成HO。塔菲尔斜率之间的相似性表明由这些复合材料负载的电催化剂具有相同的反应机理。复合负载电催化剂的HOR活性与含碳材料的类型无关。仅在5000次极化循环后，催化剂稳定性才出现明显差异；含黑珍珠的样品表现出最高的稳定性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/74602b6421ab/materials-15-03671-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/75722cc94fdf/materials-15-03671-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/762c92553b2f/materials-15-03671-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/f508fca7094b/materials-15-03671-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/74602b6421ab/materials-15-03671-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/75722cc94fdf/materials-15-03671-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/ba3dcb166474/materials-15-03671-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/f512c4960d20/materials-15-03671-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/4bd1d980c4ce/materials-15-03671-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/905fde4ddbc6/materials-15-03671-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/08ca89c238ff/materials-15-03671-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/43e7b98f8875/materials-15-03671-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/762c92553b2f/materials-15-03671-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/f508fca7094b/materials-15-03671-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bff/9148157/74602b6421ab/materials-15-03671-g010.jpg

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