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首页> 外文期刊>Catalysis science & technology >Structural modulation of CdS/ZnO nanoheterojunction arrays for full solar water splitting and their related degradation mechanisms
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Structural modulation of CdS/ZnO nanoheterojunction arrays for full solar water splitting and their related degradation mechanisms

机译：结构调制cd /氧化锌nanoheterojunction装满水太阳能阵列分裂及其相关降解机制

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摘要

The loading of a cocatalyst is an important strategy for developing efficient and stable photoanodes. CdS/ZnO nanoheterojunction arrays (NHAs) are not suitable for full solar water splitting due to the easy photocorrosion of CdS if there is no sacrificial agent. Herein, CoPi was loaded onto CdS/ZnO NHAs to improve the PEC current and stability. Heat treatment had a critical effect on the PEC performance of the Co-Pi-loaded NHA. The higher crystallinity of the CdS layer with CdCl2-assisted treatment affords the largest stable current (2.5 mA cm(-2)) for 3 h without performance degradation in 0.1 M phosphate solution (pH = 14). According to the measured band/electrolyte level alignment, the smaller current for full water splitting compared to that in the sacrificial solution is attributed to the large hole transfer resistance owing to the lowered conduction band with CoPi loading. The decrease in photocurrent over 3 h was demonstrated to be due to the photocorrosion of CdS and then the chemical corrosion of ZnO by the phosphate solution. The results suggest that the PEC performance is expected to be improved by optimizing the cocatalyst and the electrolyte solution.
机译：助催化剂是一种重要的加载发展高效、稳定的策略光电阳极。(nha)不适合全太阳能水分裂的简单photocorrosion cd如果没有牺牲剂。加载到cd /氧化锌nha改善压电陶瓷吗当前和稳定。关键的压电陶瓷性能的影响Co-Pi-loaded NHA。cd层与CdCl2-assisted提供治疗最大的稳定当前马(2.5厘米(2))3在0.1 h没有性能下降磷酸溶液(pH = 14)。测量带/电解质水平对齐,较小的电流完全水分裂相比原因是在牺牲,解决方案由于大洞传输阻力CoPi负荷的降低了导带。减少光电流/ 3 h由于photocorrosion演示cd然后氧化锌的化学腐蚀磷酸溶液。压电陶瓷性能有望得到改善优化助催化剂和电解质解决方案。

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