State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, P.R. China.
College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P.R. China.
ChemSusChem. 2019 Oct 21;12(20):4685-4692. doi: 10.1002/cssc.201901803. Epub 2019 Sep 17.
An attractive photoanode material, WO , has suffered from its limited visible-light absorption and sluggish surface reaction kinetics, as well as poor stability in neutral electrolytes. Herein, a NiFe/CQD/WO composite photoanode was designed and fabricated, with loading of carbon quantum dots (CQDs) and electrodeposition of NiFe layered double hydroxide. The NiFe/CQD/WO photoanode obtained a photocurrent density of 1.43 mA cm at 1.23 V vs. reversible hydrogen electrode, which is approximately three times higher than that of bare WO . During the test period of 3 h, the stability of WO was improved substantially after the loading of cocatalysts. Furthermore, mechanistic insights of the favored band structure and beneficial charge-transfer pathway elucidate the high photoelectrochemical performance of the NiFe/CQD/WO composite photoanode.
一种有吸引力的光阳极材料 WO ，由于其可见光吸收有限、表面反应动力学缓慢以及在中性电解质中的稳定性差，因此受到限制。在此，设计并制备了 NiFe/CQD/WO 复合光阳极，其中负载了碳量子点（CQD）并进行了 NiFe 层状双氢氧化物的电沉积。所得 NiFe/CQD/WO 光阳极在 1.23 V 相对于可逆氢电极的光电流密度为 1.43 mA cm ，约为 bare WO 的三倍。在 3 h 的测试期间，负载助催化剂后 WO 的稳定性得到了显著提高。此外，对有利的能带结构和有益的电荷转移途径的机理研究阐明了 NiFe/CQD/WO 复合光阳极的高光电化学性能。
