By integrating ZnSe passivation nanoparticles into a binary heterostructure via a facile consecutive ion-replacement reaction method, we demonstrate a solar-light-driven CdSe/ZnSe/ZnO sandwich nanotube array photoanode for hydrogen evolution via a photoelectrochemical cell. The constructed CdSe/ZnSe/ZnO sandwich nanotube array photoanode displays drastically boosted photoelectrochemical ability to generate hydrogen. The hydrogen production rate of the CdSe/ZnSe/ZnO sandwich nanotube array photoanode reaches up to 54.4 μmol h⁻¹, which is around 5 and 6 times that of the ZnSe/ZnO and ZnO nanotube array photoanodes, respectively. Moreover, the photoconversion efficiency of the CdSe/ZnSe/ZnO sandwich nanotube array photoanode reaches up to 1.7 % at 0.5 V versus RHE, which is 34 and 24 times that of the ZnO and ZnSe/ZnO nanotube array photoanodes, respectively. The measurements of the electrochemical properties demonstrate that the drastically enhanced PEC water splitting for hydrogen evolution of the sandwiched CdSe/ZnSe/ZnO nanotube arrays is attributed to the efficient separation of the photogenerated charge carriers.

通过一种简便的连续离子置换反应方法，将ZnSe钝化纳米颗粒整合到二元异质结构中，我们证明了太阳光驱动的CdSe / ZnSe / ZnO夹层纳米管阵列光阳极可通过光电化学电池释放氢。构造的CdSe / ZnSe / ZnO夹层纳米管阵列光电阳极显示出显着增强的光电化学生成氢的能力。CdSe / ZnSe / ZnO夹层纳米管阵列光阳极的产氢率高达54.4μmolh ^-1分别是ZnSe / ZnO和ZnO纳米管阵列光阳极的5倍和6倍。此外，CdSe / ZnSe / ZnO夹层纳米管阵列光电阳极在0.5V电压下的光转换效率相对于RHE高达1.7％，分别是ZnO和ZnSe / ZnO纳米管阵列光电阳极的34倍和24倍。电化学性能的测量结果表明，夹层CdSe / ZnSe / ZnO纳米管阵列产生氢的PEC水分解大大增强，这归因于光生载流子的有效分离。