Study on Hydrogen Storage and Anti-poisoning Performance of Pd-coated ZrTiCoMm Alloy AITranslate

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Chinese Library Classification Number:TB34[一般工业技术—材料科学与工程]

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ZrCo-based alloy with excellent anti-disproportionation performance was developed by alloying, that is ZrTiCoMm alloy.Pd membrane was deposited on the ZrTiCoMm alloy by chemical plating.The characteristics of Pd membrane was analyzed by SEM,EDS and cross-section BSE imaging.The activation kinetic performance and P-C-T curve of Pd/ZrTiCoMm were tested, and the influence of Pd membrane on anti-poisoning performance of ZrTiCoMm alloy was studied.The results show that a dense and uniform Pd membrane with a thickness of about 3 μm can be deposited on the surface of ZrTiCoMm alloy particles.Pd/ZrTiCoMm alloy has excellent activation kinetic performance, and its saturated hydrogen absorption capacity at room temperature is over 200 mL/g.By fitting Van′t Hoff equation with P-C-T curve of hydrogen absorption and desorption process, the equilibrium pressure of hydrogen absorption is calculated, that is about 1 Pa at room temperature, and the equilibrium pressure of hydrogen desorption can reach 100 kPa only by heating to 520 K.The hydrogen absorption kinetic performance of ZrTiCoMm alloy without coating and coated with Pd membrane was tested in 4% N₂+1% O₂+90% H₂ mixed gas.It is found that uncoated ZrTiCoMm alloy almost loses its hydrogen absorption ability in the mixed gas.However, the hydrogen absorption capacity of Pd/ZrTiCoMm alloy decreases with the increase of hydrogen absorption and desorption times, but the hydrogen absorption capacity in the initial seven times can still reach more than 55% of that in high purity hydrogen, and the hydrogen absorption kinetic performance is also excellent.