Li Yang, Luo Kai
School of Energy and Power, Jiangsu University of Science and Technology Zhenjiang Jiangsu 212003 P. R. China
School of Science, Tianjin University Tianjin 300072 China.
RSC Adv. 2019 Mar 13;9(15):8350-8354. doi: 10.1039/c9ra00865a. eCollection 2019 Mar 12.
CuO is a promising but unstable photocathode in solar water splitting. Herein, a flexible CuO photocathode is prepared and its degradation mechanisms and stabilization strategies have been discussed. Briefly, we find alkali environment and low light intensity are the critical factors in the stabilization of the CuO photocathode. For practical usage, a composite semiconductor layer, composed of TiO, LaO and NiO, is deposited on the CuO photocathode, which is proved to be effective for enhancing the stabilization of the CuO photocathode. 100% of the photocurrent density has been retained after 20 minutes of continuous illumination. The optimized stable photocurrent density is measured as 0.3 mA cm at 0.5 V.
氧化铜是太阳能水分解中一种有前景但不稳定的光阴极。在此，制备了一种柔性氧化铜光阴极，并讨论了其降解机制和稳定策略。简而言之，我们发现碱性环境和低光照强度是氧化铜光阴极稳定的关键因素。对于实际应用，在氧化铜光阴极上沉积了由TiO、LaO和NiO组成的复合半导体层，事实证明这对于提高氧化铜光阴极的稳定性是有效的。连续光照20分钟后，光电流密度保持了100%。在0.5 V时，优化后的稳定光电流密度测得为0.3 mA/cm² 。
