We have investigated a series of supported and unsupported nickel and cobalt catalysts, principally using neutron vibrational spectroscopy (inelastic neutron scattering, INS). For an alumina supported Ni catalyst we are able to detect hydrogen on the metal for the first time, all previous work has used Raney Ni. For an unsupported Ni foam catalyst, which has similar behaviour to Raney Ni but with a much lower density, the spectra show that there are approximately equal numbers of (100) and (111) sites, in contrast to Raney Ni that shows largely (111) sites. The observation of hydrogen on cobalt catalysts proved to be extremely challenging. In order to generate a cobalt metal surface, reduction in hydrogen at 250–300 °C is required. Lower temperatures result in a largely hydroxylated surface. The spectra show that on Raney Co (and probably also on a Co foam catalyst), hydrogen occupies a threefold hollow site, similar to that found on Co(\(10\bar{1}0\)). The reduced surface is highly reactive: transfers between cells in a high quality glovebox were sufficient to re-hydroxylate the surface.

我们研究了一系列负载和不负载的镍和钴催化剂，主要使用中子振动光谱法（非弹性中子散射，INS）。对于氧化铝负载的Ni催化剂，我们能够首次检测到金属上的氢，以前的所有工作都使用了阮内镍。对于无载体的Ni泡沫催化剂，其行为与阮内镍相似，但密度低得多，光谱显示（100）和（111）位大约相等，而阮内镍则主要表现为（111） ）网站。在钴催化剂上观察氢极具挑战性。为了产生钴金属表面，需要在250–300°C的温度下还原氢。较低的温度导致表面大量羟基化。\（10 \ bar {1} 0 \））。减少的表面具有很高的反应活性：高质量手套箱中细胞之间的转移足以使表面重新羟基化。