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本工作探究了共价有机框架负载贵金属Pt的电催化析氢性能。以2, 6-二氨基蒽醌和2,4,6-三甲酰基间苯三酚为构筑单元,采用溶剂热法合成了TP-DAAQ COF。随后通过金属前驱体浸渍法制备了Pt-TP-DAAQ COF。X射线粉末衍射,傅里叶红外光谱,氮气吸附/脱附等表明成功制备了TP-DAAQ COF和Pt-TP-DAAQ COF。电化学测试结果表明Pt-TP-DAAQ COF (其中含有5.8%的Pt)展现了比20% Pt/C还优异的电催化活性。当电流密度为10 mA cm?2时,Pt-TP-DAAQ COF的过电位为45 mV,Tafel 斜率为29 mV dec?1。这高效的电催化活性源于TP-DAAQ COF与Pt之间良好的协同效应。Pt-TP-DAAQ COF具有较大的比表面积和规整的一维孔道,使催化位点更易于与电解液中的物质发生接触和相互作用,从而增强了其催化性能。 相似文献
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A new compound [CoⅢ(aea)(2,2′-bipy)]Cl·H2O (aea=N-(2-aminoethyl)aspartate, 2,2′-bipy=2,2′-bipyridine) was hydrothermally synthesized and structurally characterized, which contains a new quadridentate ligand (aea) came from malic acid and ethylenediamine via in-situ reaction. The asymmetric molecules are interconnected through N-H…O hydrogen bond to form helical chains that are further hold together into a two-dimensional network via the N-H…Cl hydrogen bond. The formation of aea can be considered as the substitution of hydroxyl group in malate by ethylenediamino group, which presents a type of new in-situ ligand reaction. CCDC: 222018. 相似文献
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