“…Nanosized metal Co can be prepared by different synthetic routes. Those routes include: electron beam irradiation [10], reduction in gas phase [11, 12], sonochemical preparation [13], reduction of micellar solutions [14], usage of organic templates [15, 16], high‐energy ball milling [17], treatment with microwave radiation [18] and others [1, 19, 20]. Our preparation of metal Co nanofoams is unique, since it only requires one easily produced precursor.…”