What Are the Active Species in the Photoinduced H2 Production with Terpyridyl Pt(II) Complexes? An Investigation by in Situ XAFS
What Are the Active Species in the Photoinduced H2 Production with Terpyridyl Pt(II) Complexes? An Investigation by in Situ XAFS
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DOI：
10.1002/cphc.201201093
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发表时间：
2013-04-15
期刊：
影响因子：
2.9
通讯作者：
Yamashita, Hiromi
中科院分区：
文献类型：
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作者：
Martis, Martin;Mori, Kohsuke;Yamashita, Hiromi
阳光是最丰富的清洁能源，越来越多的人努力将其转化为一种可行的能源，作为化石燃料的环境友好替代品。太阳光谱的最大部分由可见光组成。人们致力于利用这部分光谱的各种方法，例如在太阳能电池和光催化中。一个理想的解决方案是，如果分子氢(H2)可以通过直接光催化水分解反应产生。许多方法都致力于开发能够产生氢气的催化系统，氢气是一种具有高重量能量的燃料，燃烧时只释放水。一个被广泛研究的体系是一个由金属络合光敏剂(PS)[Ru(Bpy)32+]、电子介体(甲基紫精)、牺牲电子供体(乙二胺四乙酸二钠，EDTA)和通常为胶体铂的制氢催化剂组成的三组分分子体系。[2]整个反应被认为是EDTA通过电子接力将质子还原为分子氢的可见光驱动反应，如方案1a所示。
Sunlight is the most abundant source of clean energy, and increasingly efforts have been made to convert it to a feasible form of energy, as an environmentally friendly alternative to fossil fuels. The largest part of the solar spectrum is composed of visible light. Various ways have been devoted to utilizing this part of the spectrum, for instance in solar cells and photocatalysis. An ideal solution would be if molecular hydrogen (H2) could be produced by a direct photocatalytic water splitting reaction. Numerous approaches have been devoted to development of catalytic systems that can produce H2,[1] a fuel with a high gravimetric energy and only water release upon combustion. A widely studied system to achieve this is a threecomponent molecular-based system composed of a metal complex photosensitizer (PS)[Ru (bpy) 3 2+], an electron mediator (methyl viologen), a sacrificial electron donor (ethylenediaminetetraacetic acid disodium salt, EDTA), and a hydrogen generating catalyst that is generally colloidal Pt.[2] The overall reaction is considered as a visible-light-driven reduction of protons by EDTA to molecular hydrogen through electron relay, as shown in Scheme 1a.