Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, P.R. China.
Appl Spectrosc. 2012 May;66(5):600-5. doi: 10.1366/11-06520.
The adsorption and desorption of hydrogen on Ir/SiO(2) catalyst were studied by using in situ diffuse reflection infrared Fourier transform spectroscopy (DRIFTS) combined with curve-fitting analysis. The results indicate that there are three different surface species formed on the catalyst that correspond to the peaks at 1950, 2010, and 2035 cm(-1), respectively, when exposed in H(2) flow at 130 °C. These surface species display different adsorption and desorption trends. Surface hydride forms after the catalyst is cooled to 80 °C and it disappears after the catalyst is heated to 130 °C again. This study may help us understand the interaction between hydrogen and noble metals and thus give more insights to heterogeneous catalytic mechanism involving hydrogen and hydrogen storage using metal materials.
采用原位漫反射红外傅里叶变换光谱（DRIFTS）结合曲线拟合分析的方法研究了 Ir/SiO2 催化剂上氢的吸附和解吸。结果表明，当在 130°C 的 H2 流中暴露时，催化剂上形成了三种不同的表面物种，它们分别对应于 1950、2010 和 2035cm-1 的峰。这些表面物种表现出不同的吸附和解吸趋势。在将催化剂冷却至 80°C 后形成表面氢化物，当再次将催化剂加热至 130°C 时，表面氢化物消失。这项研究可能有助于我们了解氢与贵金属之间的相互作用，从而为涉及氢和金属材料储氢的多相催化机制提供更多的见解。
