In this work, a novel photocatalyst of ZnIn₂S₄/Ni(dmgH)₂ was designed by a simple chemical precipitation method and used to enhance hydrogen evolution under visible light irradiation. Along with vigorous discharges of hydrogen bubbles, an optimal rate of 36.3 mmol/g/h was reached under UV–Vis light for hydrogen evolution, nearly 4.9 times of the one from pure ZnIn₂S₄. The heterojunction exhibits steady hydrogen evolution capability and owns a high apparent quantum efficiency (AQE) of 20.45% under the monochromatic light at 420 nm. By coupling ZnIn₂S₄ with Ni(dmgH)₂, an extraordinary photochromic phenomenon was detected and attributed to the active Ni-S component in situ formed between the nickel and sulfur composites under light irradiation. The emerging sulfide benefits light absorption of the system and separation of photogenerated electron and hole pairs. Besides providing a promising photocatalyst for visible light hydrogen production, the present work is hoped to inspire new trends of catalytic medium designs and investigations.

在这项工作中，通过简单的化学沉淀法设计了一种新型 ZnIn ₂ S ₄ /Ni(dmgH) ₂光催化剂，并用于在可见光照射下增强析氢。随着氢气泡的剧烈释放，紫外-可见光下析氢的最佳速率达到36.3 mmol/g/h，是纯ZnIn 2 S 4 的_近4.9_倍。该异质结表现出稳定的析氢能力，在 420 nm 的单色光下具有 20.45% 的高表观量子效率 (AQE)。通过将 ZnIn ₂ S ₄与 Ni(dmgH) _2偶联，检测到一种非凡的光致变色现象，并将其归因于在光照射下镍和硫复合材料之间原位形成的活性 Ni-S 组分。新出现的硫化物有利于系统的光吸收和光生电子和空穴对的分离。除了为可见光制氢提供一种有前途的光催化剂外，目前的工作还有望激发催化介质设计和研究的新趋势。