Using renewable biomass to produce syngas can form a closed carbon cycle, curbing carbon emissions. However, thermocatalysis suffers from high energy consumption, while the reaction rates of photocatalysis are relatively low. Here, we report the light-driven thermocatalytic steam cellulose reforming to hydrogen-rich syngas on the Ni nanoparticles loaded on Ca doping SiO (Ni/Ca-SiO). It exhibits a high production rate of hydrogen-rich syngas (H 3059.4 and CO 1612.1 mmol g h) and good cycling durability. Tar from cellulose pyrolysis, which is inherently challenging to prevent, is substantially decreased by the involvement of HO. Ca doping dramatically enhances HO adsorption, resulting in a significant improvement in catalytic performance. The efficient light-driven thermocatalysis derives from the strong absorption over the whole solar spectrum of Ni/Ca-SiO on the one hand. On the other hand, noticeable photoactivation effect is observed to promote the oxidation of carbon species by oxygen due to the surface Ni-O bonds being activated upon light illumination.

中文翻译：

---

Ca2+掺杂增强的H2O吸附显着提高了Ni/Ca1/8-SiO2上光驱动热催化蒸汽纤维素重整的催化性能

利用可再生生物质生产合成气可以形成封闭的碳循环，抑制碳排放。然而，热催化的能耗较高，而光催化的反应速率相对较低。在这里，我们报道了负载在 Ca 掺杂 SiO (Ni/Ca-SiO) 上的 Ni 纳米颗粒上光驱动热催化蒸汽纤维素重整为富氢合成气。它具有高富氢合成气产率（H 3059.4 和 CO 1612.1 mmol gh）和良好的循环耐久性。纤维素热解产生的焦油本质上很难防止，但通过 H2O 的参与可以大大减少焦油的产生。 Ca 掺杂显着增强了 H2O 吸附，从而显着提高了催化性能。高效的光驱动热催化一方面源于Ni/Ca-SiO在整个太阳光谱上的强吸收。另一方面，由于表面 Ni-O 键在光照射下被激活，观察到明显的光活化效应，促进碳物质被氧氧化。