Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy.
Department of Chemical Science and Technologies, University of Rome "Tor Vergata", via della Ricerca Scientifica, snc 00133 Roma, Italy.
Chem Commun (Camb). 2020 Feb 20;56(15):2248-2251. doi: 10.1039/c9cc09805d.
A pentacyclic quinoid dye, KuQ(O)3OH, combining (i) extended visible absorption up to 600 nm, (ii) excited state reduction potential >2 V vs. NHE, and (iii) a photoinduced proton-coupled electron transfer mechanism, has been used for the fabrication of dye-sensitized SnO2 photoanodes integrating a ruthenium polyoxometalate water oxidation catalyst. The resulting photoelectrode SnO2|KuQ(O)3OH|Ru4POM displays a light harvesting efficiency up to 90% in the range 500-600 nm, an onset potential as low as 0.2 V vs. NHE at pH 5.8, photoinduced oxygen evolution with a faradaic efficiency of 70 ± 15% and an absorbed-photon-to-current efficiency up to 0.12 ± 0.01%.
一种五环醌型染料 KuQ(O)3OH，结合了(i) 可见光吸收扩展至 600nm，(ii) 激发态还原电位>2V 相对于 NHE，以及(iii) 光诱导质子耦合电子转移机制，已被用于制造染料敏化 SnO2 光阳极，其中集成了钌多金属氧酸盐水氧化催化剂。所得的光电电极 SnO2|KuQ(O)3OH|Ru4POM 在 500-600nm 范围内的光捕获效率高达 90%，在 pH5.8 时的起始电位低至 0.2V 相对于 NHE，光诱导氧气析出的法拉第效率为 70±15%，吸收光子到电流的效率高达 0.12±0.01%。
