PCTPro-Evo气体吸附测量仪

Hydrogen isotherms for MOF-177, Zn4O(1,3,5-benzenetribenzoate)2, crystals were independently measured by volumetric and gravimetric methods at 77 K to confirm its hydrogen uptake capacity and to establish the importance of calibrating gas adsorption instrumentation prior to evaluating H2 storage capacities. Reproducibility of hydrogen adsorption experiments is important because non-systematic errors in measurements can easily occur leading to erroneous reports of capacities. The surface excess weight percentage of hydrogen uptake in MOF-177 samples is 7.5 wt% at 70 bar, which corresponds to an absolute adsorbed amount of 11 wt%. These values are in agreement with our previous report and with those found independently by Southwest Research Institute. Considering its well-known structure and its significant H2 uptake properties, we believe MOF-177 is an excellent material to serve as a benchmark adsorber.

储氢载锌空心玻璃微球（HGMs）的制备 目前氢经济的施行最大挑战在于在环境条件下纯氢的生产和材料的存储、控制与释放。 氢以其丰富的储藏量,高能量密度和清洁的废气可作为一种很有前途的备选能源，来满足当前全球化石燃料的枯竭和温室气体排放的挑战。 中空玻璃微球(高梯度磁分离)储氢技术正在全球进行广泛研究中, 但对于如何选择正确的储氢材料人们还在进行探索。由于材料的一些其他特性,如中空玻璃微球的低热导率等,限制了氢气的存储容量。在此基础上,我们试图通过在材料中掺杂氧化锌来提高热导率。在制备球状体的过程中，浸渍的醋酸锌与琥珀色的玻璃粉末的分别以0到10的重量百分比混合。制作好中空玻璃微球样品利用场发射扫描电子显微镜(FE-SEM)、环境扫描电镜、高分辨率透射电子显微镜(HRTEM)、傅里叶变换红外光谱和x射线衍射(XRD)技术及FE-SEM、XRD技术进行检测。在微球壁沉积的氧化锌使用FE-SEM观察，并使用ESEM和TEM的进一步证实XRD和紫外可见光谱数据。研究发现这些样品5小时内，200°C和10bar的压力条件下，样品中的锌的百分比从0增加到2%的过程中，储氢含量不断增加；当锌的比例超出2%时,储氢能力不断下降。这是由于氧化锌纳米晶体沉积在微球表面上关闭了纳米孔，因此减少了储氢容量。玻璃酸锌（HAZn2）的储氢能力在200℃、10-bar压力、3.26 %的重量比的条件下被发现。