【摘要】 通过电化学法在铜片表面生长Cu（OH）₂纳米线阵列，在氮气氛围下将其进行退火处理得到Cu₂O纳米线阵列，然后采用电沉积法在电极上沉积Cu₂O阻挡层和CeO₂,制备得到Cu₂O/CeO₂异质结光阴极材料。利于扫描电子显微镜（SEM）、X-射线衍射（XRD）和X-射线光电子能谱（XPS）对材料的形貌和化学成分等进行表征，紫外-可见吸收光谱（UV-Vis）、线性扫描伏安法（LSV）和莫特肖特基曲线（M-S）等测试对其光电化学性能进行分析。实验数据结果表明，在0 V、RHE（可逆氢电极）下，Cu₂O/CeO₂光阴极的光电流密度达到-6.55 mA/cm²,相比仅Cu₂O的光电流密度（-3.67 mA/cm²）提升了1.78倍。随后，通过ALD（原子层沉积）制备TiO₂作为保护层，负载Pt作为析氢反应（HER）的助催化剂。最终Cu₂O/CeO₂/TiO₂/Pt光阴极的光电流密度达到-10.9 mA/cm²（0 V vs.RHE）,应用偏压光子-电流效率（ABPE）达2.02%。实验的研究成果对Cu₂O基光阴极材料在光电化学水分解领域的广泛应用具有重要意义。更多还原

【Abstract】 Cu（OH）₂ nanowire arrays were grown on the surface of copper sheets by electrochemical method, annealed under nitrogen atmosphere to obtain Cu₂O nanowire arrays, and then Cu₂O/CeO₂ heterojunction photocathode materials were prepared by depositing Cu₂O blocking layer and CeO₂ on the electrode by electrodeposition method. The material is characterized by scanning electron microscopy（SEM）, X-ray diffraction（XRD） and X-ray photoelectron spectroscopy（XPS） for its morphology and chemical composition, and by ultraviolet-visible absorption spectroscopy（UV-Vis）, linear scanning voltammetry（LSV） and Mott-Schottky plot（M-S） for its photoelectrochemical properties. The results of the experimental data show that the photocurrent density of the Cu₂O/CeO₂ photocathode reaches-6.55 mA/cm² at 0V vs. RHE（reversible hydrogen electrode）, which is 1.78 times higher than that of Cu₂O（-3.67 mA/cm²）. Subsequently, TiO₂ was prepared by ALD（atomic layer deposition） as a protective layer and loaded with Pt as a co-catalyst for the hydrogen evolution reaction（HER）. The final photocurrent density of the Cu₂O/CeO₂/TiO₂/Pt photocathode reached-10.9 mA/cm² and the applied bias photon-to-current conversion efficiency（ABPE） reached 2.02%. The results of the experiments are of great importance for the wide application of Cu₂O-based photocathode materials in the field of photoelectrochemical water splitting.更多还原