利用原位合成法、还原法和浸渍法合成了石墨烯改性NiY分子筛,分别得到还原氧化石墨烯(rGO)-NiY、h-rGO-NiY和j-rGO-NiY子筛。利用X射线衍射仪、红外光谱和扫描电镜表征石墨烯改性NiY分子筛,结果表明:改性后,样品具有较高的结晶度,保持NiY分子筛的骨架结构,晶粒尺寸增大到3μm左右。在微生物电解池(MEC)阴极对石墨烯改性NiY分子筛进行催化析氢活性评价,评价结果为:12h内,rGO-NiY分子筛的最大电流密度8.10A/m2,产气量11.1mL,氢气净产量9.29mL,表现出优异的催化析氢性能。
A series of graphene modified NiY zeolites (including rGO-NiY,h-rGO-NiY and j-GO-NiY zeolites) were synthesized through in-situ method,reduction method and dipping method,respectively.With the help of XRD,FT-IR and SEM characterizations,high crystallinity,intact skeleton structure and big particle size(～3μm) were realized and confirmed after modification.Most importantly,the graphene modified NiY zeolites can be used as cathode catalyst in microbial electrolysis cell (MEC) to separate hydrogen.The evaluation of rGO-NiY showed as follows:during 12h,the maximum current density reached to 8.10A/m2,gas production were 11.1mL (pure hydrogen:9.29mL),demonstrating the excellent catalytic activity of hydrogen evolution.
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基金资助
山西省自然科学基金(2014011014-6)
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