Pastor Ernest, Pesci Federico M, Reynal Anna, Handoko Albertus D, Guo Mingjia, An Xiaoqiang, Cowan Alexander J, Klug David R, Durrant James R, Tang Junwang
Department of Chemistry, Imperial College London, Exhibition Road, SW7 2AZ, London, UK.
Phys Chem Chem Phys. 2014 Apr 7;16(13):5922-6. doi: 10.1039/c4cp00102h.
We employ transient absorption spectroscopy to record the absorption spectrum of photogenerated charge carriers in Cu2O. We have found that CO2 reduction in Cu2O is limited by fast electron-hole recombination. The deposition of RuOx nanoparticles on Cu2O results in a twofold increased yield of long-lived electrons, indicating partially reduced electron-hole recombination losses. This observation correlates with an approximately sixfold increase in the yield of CO2 reduction to CO.
我们采用瞬态吸收光谱法来记录氧化亚铜中光生电荷载流子的吸收光谱。我们发现，氧化亚铜中的二氧化碳还原受到快速电子-空穴复合的限制。在氧化亚铜上沉积氧化钌纳米颗粒会使长寿命电子的产率提高两倍，这表明电子-空穴复合损失有所降低。这一观察结果与二氧化碳还原为一氧化碳的产率提高约六倍相关。
