Supporting Information files for S vacancy modulated ZnxCd1-xS/CoP quantum dots for efficient H2 evolution from water splitting under visible light Untitled Item

Supporting Information files for S vacancy modulated ZnxCd1-xS/CoP quantum dots for efficient H2 evolution from water splitting under visible light Untitled Item<br>nergy band structure and interfacial compatibility of heterojunctions are crucial for photocatalysts inpromoting photogenerated charge separation and transfer. Here, a combined strategy of vacancy engi-neering and quantum effect via a facile phosphating process is reported, for the first time, to modulatethe energy band structure and the interface of ZnxCd1?xS/CoP quantum dots (ZCSv/CoP QDs) heterojunc-tion. The combined experimental and theoretical investigation revealed that phosphating process trans-formed CoOxQDs to CoP QDs, and more importantly, generated considerable amount of sulfur vacanciesin ZCSv. As a result, a Type II ZCSv/CoP QDs heterojunction with compatible interfaces was constructed viain-situ generated P-Zn, P-Cd and S-Co bonds, which facilitated the separation and transfer of the photo-generated charge and thus resulted in a high ability towards hydrogen evolution under visible light(17.53 mmol g?1h?1). This work provides an effective and adaptable strategy to modulate band structureand interfacial compatibility of heterojunctions via vacancy engineering and quantum effect<br>