The effect of the shape of rhodium nanoparticles impregnated on TiO₂ on photocatalytic hydrogen generation using methanol as a sacrificial reagent has been investigated by using a simple home-made UV-LED light strip reactor to activate the catalyst surface. For rhodium nanocubes, the normalised rate of H₂ production was 22.4 mmol h⁻¹ m⁻² at 365 nm and 7.5 mmol h⁻¹ m⁻² at 400 nm. The normalised activity/surface area of the studied Rh nanoparticles showed a trend that led to establishing a relationship between the exposed [100] facets and photocatalytic activity. The Rh shape-dependent H₂ production follows a trend of cubic > spherical > octahedral, which is associated with a higher surface energy of the Rh nanoparticles.

中文翻译：

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浸渍在TiO2上的铑纳米颗粒：对产氢的强烈形态学影响

通过使用简单的自制UV-LED光带反应器来活化催化剂表面，研究了浸渍在TiO ₂上的铑纳米颗粒的形状对以甲醇为牺牲试剂的光催化氢产生的影响。对于铑纳米立方体，H ₂产生的归一化速率在365 nm为22.4 mmol h ^-1 m ^-2，在400 nm为7.5 mmol h ^-1 m ^-2。研究的Rh纳米粒子的归一化活性/表面积显示出一种趋势，该趋势导致在暴露的[100]小平面与光催化活性之间建立关系。Rh形状依赖的H ₂ 生产遵循立方>球形>八面体的趋势，这与Rh纳米颗粒的较高表面能有关。