Benchmarking high surface area electrocatalysts in a gas diffusion electrode: measurement of oxygen reduction activities under realistic conditions†,Energy & Environmental Science

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Benchmarking high surface area electrocatalysts in a gas diffusion electrode: measurement of oxygen reduction activities under realistic conditions†
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2018-03-07 00:00:00 , DOI: 10.1039/c8ee00019k
Masanori Inaba _{1,

2,

3,

4,

5} , Anders Westergaard Jensen _{1,

2,

3,

4} , Gustav Wilhelm Sievers _{1,

2,

3,

4} , María Escudero-Escribano _{1,

2,

3,

4} , Alessandro Zana _{6,

7,

8,

9} , Matthias Arenz _{6,

7,

8,

9}

Affiliation

In this work, we introduce the application of gas diffusion electrodes (GDE) for benchmarking the electrocatalytic performance of high surface area fuel cell catalysts. It is demonstrated that GDEs offer several inherent advantages over the state-of-the-art technique, i.e. thin film rotating disk electrode (TF-RDE) measurements for fast fuel cell catalyst evaluation. The most critical advantage is reactant mass transport. While in RDE measurements the reactant mass transport is severely limited by the gas solubility of the reactant in the electrolyte, GDEs enable reactant transport rates similar to technical fuel cell devices. Hence, in contrast to TF-RDE measurements, performance data obtained from GDE measurements can be directly compared to membrane electrode assembly (MEA) tests. Therefore, the application of GDEs for the testing of fuel cell catalysts closes the gap between catalyst research in academia and real applications.

中文翻译：

在气体扩散电极中对高表面积电催化剂进行基准测试：在实际条件下测量氧还原活性†

在这项工作中，我们介绍了气体扩散电极（GDE）在标定高表面积燃料电池催化剂的电催化性能方面的应用。事实证明，与最先进的技术相比，GDE具有许多固有的优势，即薄膜转盘电极（TF-RDE）测量，用于快速评估燃料电池催化剂。最关键的优势是反应物的大规模运输。在RDE测量中，反应物的质量传输受到反应物在电解液中的气体溶解度的严重限制，而GDE则使反应物的传输速率类似于工业燃料电池设备。因此，与TF-RDE测量相反，从GDE测量获得的性能数据可以直接与膜电极组件（MEA）测试进行比较。因此，将GDE用于燃料电池催化剂的测试填补了学术界催化剂研究与实际应用之间的空白。

更新日期：2018-03-07

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