Communication—Investigation of Catalyst Ink Degradation by X-ray CT
Communication—Investigation of Catalyst Ink Degradation by X-ray CT
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通讯——通过 X 射线 CT 研究催化剂墨水的降解
DOI：
10.1149/2.0411803jes
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
S. Hirai
中科院分区：
文献类型：
--
作者：
S. Uemura;Y. Kameya;N. Iriguchi;Toshihiko Yoshida;K. Shinohara;S. Hirai
x射线计算机断层扫描用于观察由铂/炭黑组成的催化剂墨水在水/1-丙醇中随时间变化的内部结构。观察到气泡膨胀和第三相的出现。气相色谱-质谱联用测定油墨中产生丙醛和丙酸。对油墨容器内气体的分析表明，二氧化碳浓度增加了。结果表明，在铂的催化下，1-丙醇的氧化反应导致了油墨的降解。因此，控制催化剂油墨与氧气的接触是控制油墨质量的一个重要方面。
X-ray computed tomography was used to visualize the interior of a catalyst ink composed of platinum/carbon black in water/1-propanol over time. Bubble expansion and the emergence of a tertiary phase were observed. Gas chromatography-mass spectrometry determined that propionaldehyde and propionic acid were produced in the ink. Analysis of the gases within the ink container indicated that the CO2 concentration was increased. These results indicate that the oxidation reaction of 1-propanol, as catalyzed by platinum, resulted in degradation of the ink. Thus, controlling the exposure of the catalyst ink to oxygen is an important aspect of managing the quality of the ink.