Photocatalytic H2 evolution from NADH with carbon quantum dots/Pt and 2-phenyl-4-(1-naphthyl)quinolinium ion.
Photocatalytic H2 evolution from NADH with carbon quantum dots/Pt and 2-phenyl-4-(1-naphthyl)quinolinium ion.
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DOI：
10.1016/j.jphotobiol.2014.10.018
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发表时间：
2015-11
期刊：
影响因子：
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通讯作者：
Wenting Wu;Liying Zhan;K. Ohkubo;Yusuke Yamada;Mingbo Wu;S. Fukuzumi
中科院分区：
文献类型：
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作者：
Wenting Wu;Liying Zhan;K. Ohkubo;Yusuke Yamada;Mingbo Wu;S. Fukuzumi
将碳量子点（CQDs）与铂盐（k2ptcl4和K2PtCl6）简单混合，在NADH（电子和质子源）和2-苯基-4-（1-萘基）喹啉离子（QuPh+−NA）作为有机光催化剂的水溶液的光照射下，Pt盐分散在CQDs表面，转化为析氢共催化剂。共催化剂（CQDs/Pt）表现出与纯Pt纳米颗粒（PtNPs）相似的h2析出催化活性，尽管CQDs/Pt的Pt量仅为先前报道的PtNPs的1/200。cqd能够捕获作为Pt载体的Pt盐。同时，CQDs作为电子储层，在促进电子从QuPh+−NA向Pt盐的转移中发挥了重要作用，这一点通过动力学研究、XPS和HRTEM得到了证实。
Carbon quantum dots (CQDs) were simply blended with platinum salts (K2PtCl4and K2PtCl6) and converted into a hydrogen-evolution co-catalystin situ, wherein Pt salts were dispersed on the surface of CQDs under photoirradiation of an aqueous solution of NADH (an electron and proton source) and 2-phenyl-4-(1-naphthyl)quinolinium ion (QuPh+−NA) employed as an organic photocatalyst. The co-catalyst (CQDs/Pt) exhibits similar catalytic reactivity in H2evolution as that of pure Pt nanoparticles (PtNPs) although the Pt amount of CQDs/Pt was only 1/200 that of PtNPs previously reported. CQDs were able to capture the Pt salt acting as Pt supports. Meanwhile, CQDs act as electron reservoir, playing an important role to enhance electron transfer from QuPh+−NA to the Pt salt, which was confirmed by kinetic studies, XPS and HRTEM.