Realizing a highly efficient catalytic activity for photoelectrochemical (PEC) water splitting has been becoming a key challenge for fabricating TiO₂ photoanode, due to its weak light-response ability and poor electrical conductivity. For the first time, we prepared the TiO₂ nanorods decorated with NH₂-MIL-125 film, and subsequently in-situ implanted Ag nanoparticles (Ag NPs) into NH₂-MIL-125 film by mild reduction process with the help of amine group. The synergistic effect between NH₂-MIL-125 and Ag NPs is aimed at efficiently improving light-response and the overall conductivity of photoanode. The PEC performance of as-prepared Ag/NH₂-MIL-125/TiO₂ hybrid-photoanode has been systemically investigated. The photocurrent density of optimal Ag/NH₂-MIL-125/TiO₂ has reached 1.06 mA/cm² at 1.23 V (vs. RHE) under illumination (100 mW/cm²), which is almost 4.42 times higher than that of pristine TiO₂. The incident photon-to-electron conversion efficiency (IPCE) value of Ag/NH₂-MIL-125/TiO₂ has been increased to 51.0 % at 390 nm. Furthermore, the desirable charge injection (${\eta }_{\mathrm{i}\mathrm{n}\mathrm{j}\mathrm{e}\mathrm{c}\mathrm{t}\mathrm{i}\mathrm{o}\mathrm{n}}$) of 96.4% and charge separation (${\eta }_{\mathrm{s}\mathrm{e}\mathrm{p}\mathrm{a}\mathrm{r}\mathrm{a}\mathrm{t}\mathrm{i}\mathrm{o}\mathrm{n}}$) efficiency of 33.1% have been achieved. The in-situ introduction of Ag NPs into NH₂-MIL-125/TiO₂ heterostructure provides a novel model for understanding the synergistic effect between metal and MOF over PEC water splitting.

由于其光响应能力弱和导电性差，实现用于光电化学（PEC）水分解的高效催化活性已成为制造TiO _2光阳极的关键挑战。我们首次制备了装饰有NH ₂ -MIL-125膜的TiO ₂纳米棒，然后在胺的帮助下通过温和的还原工艺将Ag纳米颗粒（Ag NPs）原位注入NH ₂ -MIL-125膜中。组。NH ₂ -MIL-125和Ag NP之间的协同作用旨在有效改善光响应和光电阳极的整体电导率。制备的Ag / NH ₂ -MIL-125 / TiO ₂的PEC性能混合光阳极已得到系统研究。最佳Ag / NH ₂ -MIL-125 / TiO ₂的光电流密度在1.23 V（vs. RHE）下在光照（100 mW / cm ²）下已达到1.06 mA / cm ²，几乎是1.04 mA / cm ²。原始TiO ₂。Ag / NH ₂ -MIL-125 / TiO ₂的入射光子-电子转换效率（IPCE）值在390 nm下增加至51.0％。此外，理想的电荷注入（${\eta }_{\mathrm{一世}\mathrm{ñ}\mathrm{Ĵ}\mathrm{Ë}\mathrm{C}\mathrm{Ť}\mathrm{一世}\mathrm{Ø}\mathrm{ñ}}$）的96.4％和电荷分离（${\eta }_{\mathrm{s}\mathrm{Ë}\mathrm{p}\mathrm{一种}\mathrm{[R}\mathrm{一种}\mathrm{Ť}\mathrm{一世}\mathrm{Ø}\mathrm{ñ}}$）的效率已达到33.1％。Ag NPs原位引入NH ₂ -MIL-125 / TiO ₂异质结构为理解金属和MOF在PEC水分解中的协同效应提供了一个新模型。