A novel ITO/NiO/Cu₂O structure served as photocathodes was applied in photoelectrochemical (PEC) water splitting for the first time. The NiO integration is found to slightly ameliorate the crystalline structure of Cu₂O. PEC measurements showed that NiO-modified Cu₂O photocathodes can deliver a higher PEC performance, as the photocurrent density was up to − 1.68 mA/cm² at − 0.6 V versus RHE under simulated AM 1.5G illumination, which is 2.8 times higher than that of nude one. The enhanced PEC performance may come from the improved charge separation and migration properties of NiO modification.

中文翻译：

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用于光电化学水分解的新型NiO修饰的Cu 2 O光电阴极

首次将新型的ITO / NiO / Cu ₂ O结构作为光阴极应用于光电化学（PEC）水分解中。发现NiO集成可以稍微改善Cu ₂ O的晶体结构。PEC测量表明，NiO修饰的Cu ₂ O光电阴极可以提供更高的PEC性能，因为在-0.6时光电流密度高达-1.68 mA / cm ²。在模拟AM 1.5G照明下，V与RHE的比值是裸裸照的2.8倍。增强的PEC性能可能来自NiO改性剂改善的电荷分离和迁移性能。