A novel fuel cell design foroperandoenergy-dispersive x-ray absorption measurements.
A novel fuel cell design foroperandoenergy-dispersive x-ray absorption measurements.
复制标题
一种用于操作能量色散 X 射线吸收测量的新型燃料电池设计。
DOI：
10.1088/1361-648x/ac0476
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Leach AS
中科院分区：
文献类型：
--
作者：
Leach AS
A polymer electrolyte fuel cell has been designed to allow operando x-ray absorption spectroscopy (XAS) measurements of catalysts. The cell has been developed to operate under standard fuel cell conditions, with elevated temperatures and humidification of the gas-phase reactants, both of which greatly impact the catalyst utilisation. X-ray windows in the endplates of the cell facilitate collection of XAS spectra during fuel cell operation while maintaining good compression in the area of measurement. Results of polarisation curves and cyclic voltammograms showed that the operando cell performs well as a fuel cell, while also providing XAS data of suitable quality for robust XANES analysis. The cell has produced comparable XAS results when performing a cyclic voltammogram to an established in situ cell when measuring the Pt LIII edge. Similar trends of Pt oxidation, and reduction of the formed Pt oxide, have been presented with a time resolution of 5 s for each spectrum, paving the way for time-resolved spectral measurements of fuel cell catalysts in a fully-operating fuel cell.
