钴氮共掺杂生物质活性炭提升氧化还原催化剂性能

采用新鲜海带为原料,先真空冷冻干燥,粉碎过筛后与一定量KOH干混,高温活化制备生物质活性炭,选取优化后的活性炭掺杂钴氮元素,经过高温煅烧形成Co-N-C型非贵重金属催化剂.结果表明,海带基生物质活性炭在活化温度为800℃,活化时间60 min下比表面积为2071.72 m²/g,总孔容为1.20 cm³/g,产率为25.06%;该生物质活性炭掺杂钴氮元素获得的催化剂材料拥有很好的ORR (氧还原反应)活性、耐甲醇性和稳定性,可以被广泛的应用在能源领域.

Novel Co-N-C Type Non-Precious Metal Catalyst Fabricated from Fresh Kelp

A novel Co-N-C type non-precious metal oxygen reduction catalyst was developed with the framework of activated carbon made from fresh kelp. First, the vacuum freeze-dried kelp was broken to pieces; second, a mixture of sieved kelp powder and some KOH was activated at high temperature; and finally, the Co-N-C type nonprecious metal catalysts was synthesized via high temperature calcination of the activated carbon co-doped with cobalt and nitrogen. The newly-developed catalyst was characterized with X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy and Autolab electrochemical workstation.The results show that the new catalyst displayed good oxygen reduction reaction activity, strong methanol-resistance and high stability. Moreover, activated at 800℃ for 60 min, its specific surface area, pore volume and yield were found to be 2071. 72 m²/g, 1. 20 cm³/g and 25. 06%, respectively. We suggest that new highly porous catalyst be of some technological interest in energy industry.