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Phosphate stabilized PdCoP@Nifoam catalyst for self-pressurized H2 production from the electrochemical reforming of ethanol at 150 °C
Journal of Catalysis ( IF 7.3 ) Pub Date : 2020-01-09 , DOI: 10.1016/j.jcat.2019.12.019
Maria Vincenza Pagliaro , Marco Bellini , Alessandro Lavacchi , Hamish Andrew Miller , Carlo Bartoli , Francesco Vizza

The electrochemical reforming of ethanol to H2 is achieved at 150 °C in an autoclave electrochemical cell that allows the safe pressurization of the H2 produced as no O2 is evolved. The alkaline conditions are very aggressive to catalysts including noble metals like Pt and Pd. We report a highly active ethanol oxidation catalyst (PdCoNifoam) composed of Pd nanoparticles supported on nanostructured Co oxide structures grown on nickel foam. Treatment with phosphorous vapors at high temperature yields a thin coating of phosphate that confers enhanced stability to the electrode operating in an electrolysis cell at 150 °C. A combination of scanning electron microscopy (energy dispersive X-ray spectroscopy) and X-ray photoelectron spectroscopy reveal a 3D nano-flake surface with an external layer of phosphates that prevents Pd dissolution. The [email protected]foam catalyst was successfully used for ethanol electrochemical reforming at 150 °C with self-pressurization of the H2 produced by the electrochemical reaction.



中文翻译:

磷酸盐稳定的PdCoP @ Nifoam催化剂,用于在150°C的条件下对乙醇进行电化学重整以自加压制氢

在高压釜电化学池中,在150°C的温度下将乙醇电化学重整为H 2,可以安全加压生成的H 2,因为不会释放O 2。碱性条件对包括贵金属(如Pt和Pd)在内的催化剂具有很强的侵蚀性。我们报告了一种高活性乙醇氧化催化剂(PdCoNi泡沫)由负载在镍泡沫上生长的纳米结构Co氧化物结构上的Pd纳米颗粒组成。在高温下用磷蒸汽处理会产生一层薄薄的磷酸盐涂层,从而使在150°C的电解槽中工作的电极具有更高的稳定性。扫描电子显微镜(能量色散X射线能谱)和X射线光电子能谱的组合显示3D纳米片状表面具有防止Pd溶解的磷酸盐外层。[电子邮件保护的]泡沫催化剂已成功用于150°C的乙醇电化学重整,并通过电化学反应产生的H 2自加压。

更新日期:2020-01-11
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