Institute of Urban & Rural Mining, Changzhou University, Changzhou 213164, China.
Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Changzhou 213164, China.
Int J Environ Res Public Health. 2023 Mar 1;20(5):4383. doi: 10.3390/ijerph20054383.
Lignin is an ideal carbon source material, and lignin-based carbon materials have been widely used in electrochemical energy storage, catalysis, and other fields. To investigate the effects of different lignin sources on the performance of electrocatalytic oxygen reduction, different lignin-based nitrogen-doped porous carbon catalysts were prepared using enzymolytic lignin (EL), alkaline lignin (AL) and dealkaline lignin (DL) as carbon sources and melamine as a nitrogen source. The surface functional groups and thermal degradation properties of the three lignin samples were characterized, and the specific surface area, pore distribution, crystal structure, defect degree, N content, and configuration of the prepared carbon-based catalysts were also analyzed. The electrocatalytic results showed that the electrocatalytic oxygen reduction performance of the three lignin-based carbon catalysts was different, and the catalytic performance of N-DLC was poor, while the electrocatalytic performance of N-ELC was similar to that of N-ALC, both of which were excellent. The half-wave potential (E) of N-ELC was 0.82 V, reaching more than 95% of the catalytic performance of commercial Pt/C (E = 0.86 V) and proving that EL can be used as an excellent carbon-based electrocatalyst material, similar to AL.
木质素是一种理想的碳源材料，基于木质素的碳材料已经广泛应用于电化学储能、催化等领域。为了研究不同木质素来源对电催化氧还原性能的影响，我们使用酶解木质素（EL）、碱性木质素（AL）和脱碱木质素（DL）作为碳源，三聚氰胺作为氮源，制备了不同的基于木质素的氮掺杂多孔碳催化剂。对三种木质素样品的表面官能团和热降解性能进行了表征，并对制备的碳基催化剂的比表面积、孔分布、晶体结构、缺陷程度、N 含量和构型进行了分析。电催化结果表明，三种木质素基碳催化剂的电催化氧还原性能不同，N-DLC 的催化性能较差，而 N-ELC 的电催化性能与 N-ALC 相似，均表现出优异的性能。N-ELC 的半波电位（E）为 0.82 V，达到了商业 Pt/C（E = 0.86 V）催化性能的 95%以上，证明了 EL 可以作为一种优秀的基于碳的电催化剂材料，类似于 AL。
