原位核磁共振技术研究共催化剂类型以及光照波长对甲醇光催化重整产物的影响

Effects of Co-Catalysts and Wavelength of Light on the Products of Photocatalytic Methanol Reforming: An Operando NMR Study

本文采用原位核磁共振的方法研究了在真实固-液环境中共催化剂类型以及光照波长对甲醇光催化重整产物及光解水产氢产率的影响.结果发现,不同贵金属担载的锐钛矿型二氧化钛催化剂对甲醇光催化重整产物的产量和产率有着不同程度的影响,但是对其动力学特征影响不大.光照波长对甲醇光催化重整产物的产量也影响较大.通过对比甲醇氧化产率与产氢产率,发现共催化剂的种类对光催化反应速率及氧化还原能力起重要作用,且共催化剂的种类会影响体系氧化和还原能力之间的协同性.

In operando nuclear magnetic resonance(in operando NMR)was used to investigate the effects of co-catalysts and wavelength of light on the products of photocatalytic methanol reforming,as well as the hydrogen production rate,in a real solid-liquid reaction environment.The results demonstrated that adding co-catalysts(i.e.,anatase TiO2 modified with different isolated noble metal atoms)could affect the yields of reforming products to some extents,but had only little effects on the reaction kinetics.And the wavelength of light also had a large effect on the yields.It was concluded that the co-catalysts might play important roles in providing the redox capacity and the synergistic effects between methanol oxidation and hydrogen production.