Huang Jie, Liu Xuejun, Yuan Ding, Chen Xiaolan, Wang Minghui, Li Meiyue, Zhang Lixue
College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Hydrogen Energy Key Materials and Technologies of Shandong Province, Qingdao University, Qingdao 266071, PR China.
College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Hydrogen Energy Key Materials and Technologies of Shandong Province, Qingdao University, Qingdao 266071, PR China.
J Colloid Interface Sci. 2024 Jun 15;664:25-32. doi: 10.1016/j.jcis.2024.03.022. Epub 2024 Mar 5.
Lignin upgrading to various functional products is promising to realize high-value utilization of low-cost and renewable biomass waste, but is still in its infancy. Herein, using industry waste lignosulfonate as the biomass-based carbon source and urea as the dopant, we constructed a heteroatom-doped porous carbon nanosheet structure by a simple NaCl template-assisted pyrolytic strategy. Through the synergistic effect of the NaCl template and urea, the optimized lignin-derived porous carbon catalyst with high content of active nitrogen species and large specific surface area can be obtained. As a result, the fabricated catalysts exhibited excellent electrocatalytic oxygen reduction activity, as well as good methanol tolerance and stability, comparable to that of commercial Pt/C. Moreover, rechargeable Zn-air batteries assembled with this electrocatalyst have a peak power density of up to 150 mW cm and prominent long-term cycling stability. This study offers an inexpensive and efficient way for the massive production of highly active metal-free catalysts from the plentiful, inexpensive and environmentally friendly lignin, offering a good direction for biomass waste recycling and utilization.
将木质素升级转化为各种功能产品有望实现低成本可再生生物质废弃物的高价值利用，但目前仍处于起步阶段。在此，我们以工业废弃物木质素磺酸盐为生物质基碳源、尿素为掺杂剂，通过简单的氯化钠模板辅助热解策略构建了一种杂原子掺杂的多孔碳纳米片结构。通过氯化钠模板和尿素的协同作用，可获得具有高活性氮物种含量和大比表面积的优化木质素衍生多孔碳催化剂。结果表明，所制备的催化剂表现出优异的电催化氧还原活性，以及良好的甲醇耐受性和稳定性，与商业铂碳催化剂相当。此外，用这种电催化剂组装的可充电锌空气电池具有高达150 mW/cm²的峰值功率密度和出色的长期循环稳定性。本研究为从丰富、廉价且环境友好的木质素中大规模生产高活性无金属催化剂提供了一种廉价且高效的方法，为生物质废弃物的回收利用提供了良好的方向。
