Liu Changhai, Zhang Chao, Yin Ge, Zhang Tingting, Wang Wenchang, Ou Guofu, Jin Haozhe, Chen Zhidong
School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu 213164, China.
School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China.
ACS Appl Mater Interfaces. 2021 Mar 24;13(11):13301-13310. doi: 10.1021/acsami.1c00948. Epub 2021 Mar 16.
Photoelectrochemical (PEC) water splitting provides an alternative strategy for clean and renewable hydrogen production; however, the practical application is severely limited by the low solar conversion. Herein, a novel and simple strategy has been developed to construct a 3D branched TiO photoanode with an ultrathin AlO passivation layer and NiOOH cocatalyst. The structure and properties of the as-obtained photoanodes are explored by X-ray diffraction, Mott-Schottky, electrochemical impedance spectroscopy, and open circuit voltage measurements. The as-obtained B-TiO/AlO/NiOOH ternary heterojunction with a high-quality contact interface exhibits improved light absorption ability, an enhanced photocurrent density of 1.42 mA/cm at 1.23 V, high conversion efficiency (0.44% at 0.80 V), and excellent stability compared to pristine TiO and alone-AlO or NiOOH decorated TiO photoanodes. Therefore, this work could offer a new approach to designing and fabricating high-quality contact interfaces between photoelectrodes and various cocatalysts.
光电化学（PEC）水分解为清洁和可再生制氢提供了一种替代策略；然而，实际应用受到低太阳能转换效率的严重限制。在此，已开发出一种新颖且简单的策略来构建具有超薄AlO钝化层和NiOOH助催化剂的三维分支TiO光阳极。通过X射线衍射、莫特-肖特基、电化学阻抗谱和开路电压测量来探究所得光阳极的结构和性能。与原始TiO以及单独的AlO或NiOOH修饰的TiO光阳极相比，所获得的具有高质量接触界面的B-TiO/AlO/NiOOH三元异质结表现出改善的光吸收能力、在1.23 V时增强的光电流密度1.42 mA/cm²、高转换效率（在0.80 V时为0.44%）以及优异的稳定性。因此，这项工作可为设计和制造光电极与各种助催化剂之间的高质量接触界面提供一种新方法。
