Yolk-shelled CoS₂ nanospheres are designed through Kirkendall Effect and subsequently converted into defect-rich CdS/CdCO₃-CoS₂ photocatalysts via in-situ growth method. The optimal CdS/CdCO₃-CoS₂ exhibits a significant hydrogen evolution rate of 64867.88 μmol h^-1 g_cat^-1 that is 3.23 and 49.45 folds higher than CoS₂-CdS and pure CdS. CO₂ reduction rate of CdS/CdCO₃-CoS₂ is detected additionally (654.7 μmol h^-1 g_cat^-1). Yolk-shelled CdS/CdCO₃-CoS₂ induces the multi-scattering of incident light, possessing 1.52-fold H₂ production rate than that of full hollow ones. Enhanced photoexcited-carriers migration efficiency is attributed to the synergistic effect between possible Mie resonance at about λ = 450 nm in yolk-shelled architecture based on Mie’s theory and monochromatic light HER test, and the formation of defect energy level within the wide-band gap of CdCO₃ in Schottky-type/type II heterojunction. Electron paramagnetic resonance, positron annihilation spectroscopy and density functional theory calculation etc. are employed to validate the presence of oxygen vacancies and the photocatalytic mechanism.

蛋黄壳CoS ₂纳米球是通过柯肯达尔效应设计的，随后通过原位生长方法转化为富含缺陷的CdS/CdCO ₃ -CoS _{2光催化剂。}最佳CdS/CdCO ₃ -CoS ₂的析氢速率显着为64867.88 μmol h ^-1 g _cat ^{-1 ，分别是CoS} ₂ -CdS和纯CdS的3.23倍和49.45倍。_{另外检测CdS/CdCO 3} -CoS ₂的CO ₂还原率(654.7 μmol h ^-1 g _cat ^-1 )。蛋黄壳 CdS/CdCO ₃ -CoS₂引起入射光的多次散射，H ₂的产生率是全空心的1.52倍。增强的光激发载流子迁移效率归因于基于 Mie 理论的蛋黄壳结构中约 λ = 450 nm 处可能的 Mie 共振和单色光 HER 测试之间的协同效应，以及在宽带隙内形成缺陷能级肖特基型/II型异质结中的CdCO _{3 。}采用电子顺磁共振、正电子湮没光谱和密度泛函理论计算等方法验证了氧空位的存在和光催化机理。