Cao Weimin, Shen Zeru, Li Jiayi, Li Jingyu, Zhao Yiying, Zhang Qingran, Liu Qiang
College of Science, Shanghai University, Shanghai 200444, China.
School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
J Colloid Interface Sci. 2025 Mar 15;682:242-250. doi: 10.1016/j.jcis.2024.11.194. Epub 2024 Nov 26.
Electrochemical oxidation of glycerol into value-added chemicals represents a sustainable approach for not only valorizing biomass resources but also improving the energy efficiency of electrolysis by replacing the kinetically sluggish oxidation of water at the anode. Here, we present a nickel (oxy)hydroxide supported cobalt nanoneedle arrays catalyst (CoNA-NiOH/NF-2) for effective oxidation of glycerol. The loaded Co(OH) forms more oxygen defects, increases the active sites, and enhances the performance of glycerol oxidation. The CoNA-NiOH/NF-2 catalyst significantly reduces energy consumption by achieving a current density of 10 mA cm at a low voltage of 1.22 V vs. RHE, and 100 mA cm at 1.42 V vs. RHE, which is approximately 240 mV lower than oxygen evolution reaction (OER). Additionally, the Faraday efficiency of formate generation reached 98 %. The growth of renewable energy sources will greatly benefit from this strategy, which calls for replacing anodic OER with biomass oxidation.
将甘油电化学氧化为高附加值化学品，不仅是一种使生物质资源增值的可持续方法，而且通过取代阳极动力学缓慢的析氧反应，还能提高电解的能源效率。在此，我们展示了一种用于高效氧化甘油的氢氧化镍负载钴纳米针阵列催化剂（CoNA-NiOH/NF-2）。负载的Co(OH)形成更多氧缺陷，增加活性位点，并提高甘油氧化性能。CoNA-NiOH/NF-2催化剂在相对于可逆氢电极（RHE）为1.22 V的低电压下实现10 mA cm的电流密度，在1.42 V vs. RHE下实现100 mA cm的电流密度，显著降低了能耗，这比析氧反应（OER）低约240 mV。此外，甲酸盐生成的法拉第效率达到98%。可再生能源的发展将极大地受益于这一策略，该策略要求用生物质氧化取代阳极OER。
