Impact of Transition Metals and Electrocatalyst Layer Thickness on the Pt‐Based Cathodes of Proton Exchange Membrane Fuel Cells – Do Multimetallic Electrocatalysts Necessarily Yield an Improved Performance?

IF 24.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Advanced Energy Materials Pub Date : 2024-12-23 DOI:10.1002/aenm.202403212

Ricardo Sgarbi, William Ait Idir, Quentin Labarde, Camille Jourdin, Vincent Martin, Daniele Andreetta, Peizhe Wu, Enrico Negro, Fabio Bassetto, Julia Mainka, Jérôme Dillet, Clémence Marty, Fabrice Micoud, Vito Di Noto, Pawel Kulesza, Olivier Lottin, Marian Chatenet

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Abstract

The interplay between i) cathodic electrocatalytic layer (EC layer) features of proton exchange membrane fuel cell (PEMFC), focusing on the oxygen reduction reaction (ORR) electrocatalyst (EC) and the Pt loading; and ii) the PEMFC performance and durability is evaluated. An innovative hierarchical “core–shell” carbon nitride multimetallic ORR electrocatalyst (“PtCuNi/C” H‐EC) is compared with a conventional Pt/C benchmark. The various contributions to PEMFC performance at beginning of test (BOT) are isolated and correlated to the physicochemical features of the ORR EC and the cathodic EC layer. The PEMFC durability is investigated extensively via accelerated stress tests (ASTs) mimicking long‐term operation. Particular attention is dedicated to determine how ageing affects: i) PEMFC cell voltage; and ii) the cathode electrochemically active surface area (ECSA). “Post‐mortem” studies are carried out to probe how ageing influences the cathodic EC layer features, including: i) chemical composition; ii) elements distribution; iii) EC morphology; and iv) structure and crystal size of the Pt‐based metal nanoparticles bearing the active sites. Integrating the experimental results allows to identify both the positive and the detrimental effects triggered by the introduction of transition metals (TMs) in the ORR EC on the factors modulating PEMFC performance and long‐term operation.

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过渡金属和电催化剂层厚度对质子交换膜燃料电池Pt基阴极的影响——多金属电催化剂一定能提高性能吗？

i)质子交换膜燃料电池（PEMFC）阴极电催化层（EC层）特性之间的相互作用，重点研究氧还原反应（ORR）电催化剂（EC）与Pt负载之间的相互作用；ii)评估了PEMFC的性能和耐久性。一种创新的分层“核-壳”氮化碳多金属ORR电催化剂（“PtCuNi/C”H‐EC）与传统的Pt/C基准进行了比较。影响PEMFC测试初期（BOT）性能的各种因素与ORR EC和阴极EC层的物理化学特征相互隔离和相关。通过模拟长期作业的加速压力测试（ast），对PEMFC的耐久性进行了广泛的研究。特别注意的是确定老化如何影响：i) PEMFC电池电压；ii)阴极电化学活性表面积（ECSA）。进行“事后”研究以探索老化如何影响阴极EC层的特征，包括：i)化学成分；Ii)元素分布；iii) EC形态学；iv)含有活性位点的铂基金属纳米颗粒的结构和晶体尺寸。综合实验结果，可以确定在ORR EC中引入过渡金属（TMs）对调节PEMFC性能和长期运行的因素所引发的积极和有害影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

41.90

自引率

4.00%

发文量

889

审稿时长

1.4 months

期刊介绍： Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.