Photocatalytic Reduction of Low Concentration of CO2
Photocatalytic Reduction of Low Concentration of CO2
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DOI：
10.1021/jacs.6b08824
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发表时间：
2016-10-26
影响因子：
15
通讯作者：
Ishitani, Osamu
中科院分区：
文献类型：
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作者：
Nakajima, Takuya;Tamaki, Yusuke;Ishitani, Osamu
以Ru(II)-Re(I)双核配合物为光催化剂，开发了一种既具有较高的CO2还原能力又具有较高的CO2捕集能力的新型分子光催化体系。利用该光催化体系可以选择性地将10%的CO2转化为CO，其光催化性能与纯CO2气氛(TONCO>；1000，Phi(CO)>；0.4)几乎相同。与使用纯二氧化碳相比，使用相同的系统，即使是0.5%的二氧化碳浓度也可以减少60%的初始CO生成效率(TONCO>；200)。光催化剂中的Re(I)催化剂单元可以有效地捕获进行CO2插入到Re-O键的CO2，然后通过使用从光化学还原的Ru光敏剂单元提供的电子来还原捕获的CO2。
A novel molecular photocatalytic system with not only high reduction ability of CO2 but also high capture ability of CO2 has been developed using a Ru(II)-Re(I) dinuclear complex as a photocatalyst. By using this photocatalytic system, CO2 of 10% concentration could be selectively converted to CO with almost same photocatalysis to that under a pure CO2 atmosphere (TONCO > 1000, Phi(CO) > 0.4). Even 0.5% concentration of CO2 was reduced with 60% initial efficiency of CO formation by using the same system compared to that using pure CO2 (TONCO > 200). The Re(I) catalyst unit in the photocatalyst can efficiently capture CO2, which proceeds CO2 insertion to the Re-O bond, and then reduce the captured CO2 by using an electron supplied from the photochemically reduced Ru photosensitizer unit.