Solar-driven splitting of alcohol utilizing photocatalysts is a promising route to obtain H₂ and fine chemicals. Ni nanoparticles have shown great potential for light-driven splitting of alcohol, and their size, exposed facets, and electronic properties play key roles in the performance of photocatalysts. Therefore, purposefully modifying Ni is of great importance. In this report, Ni–Ag nanostructures were fabricated in situ on graphitic carbon nitride by a sequential photodeposition method. The solar-driven hydrogen production from ethanol was dramatically enhanced on the Ni–Ag nanostructure-modified graphitic carbon nitride compared with pure Ni nanoparticle-modified graphitic carbon nitride. It was found that the beneficial role of Ag is to disperse and stabilize small Ni nanoparticles and, importantly, expose catalytic sites that are less prone to accumulate ethanol decomposition products (acetate species), as proven by in situ diffuse reflectance infrared Fourier transform spectroscopy.

中文翻译：

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Ni-Ag纳米结构改性的石墨碳氮化物可增强乙醇驱动太阳能制氢的性能

利用光催化剂进行太阳能驱动的酒精裂解是获得H ₂的有前途的途径和精细化学品。Ni纳米粒子显示出光驱分解酒精的巨大潜力，其尺寸，裸露的小面和电子特性在光催化剂的性能中起关键作用。因此，有目的地改性Ni非常重要。在本报告中，通过顺序光沉积法在石墨氮化碳上原位制备了Ni-Ag纳米结构。与纯Ni纳米粒子改性的石墨碳氮化物相比，Ni-Ag纳米结构改性的石墨碳氮化物显着提高了乙醇产生的太阳能驱动的氢。发现Ag的有益作用是分散和稳定小的Ni纳米颗粒，并且重要的是，暴露不易积聚​​乙醇分解产物（乙酸物质）的催化部位，