Heteroatom embedded graphene-like structure anchored on porous biochar as efficient metal-free catalyst for ORR
Heteroatom embedded graphene-like structure anchored on porous biochar as efficient metal-free catalyst for ORR
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DOI：
10.1016/j.ijhydene.2019.09.239
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发表时间：
2019-11
影响因子：
7.2
通讯作者：
Feng Zhang;J. Miao;Wenqi Liu;Dongyan Xu;Xiaojing Li
中科院分区：
文献类型：
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作者：
Feng Zhang;J. Miao;Wenqi Liu;Dongyan Xu;Xiaojing Li
高效的生物质衍生碳作为金属基催化剂的替代物用于氧还原反应（ORR）具有很大的潜力。该研究为大量制备N，S嵌入类石墨烯结构的浒苔生物炭提供了一种可行的方法，首次将其作为高效的无金属电催化剂用于有机电还原反应。省略原材料的选择和分类以及通过掺杂剂的进一步额外的活化和/或改性，仅通过热解和酸蚀刻来调节制备过程。所得催化剂具有低N含量（3.80at%）、低S含量（1.00at%）和大表面积（778.2 m2 g-1），在四电子途径中表现出相对于RHE的0.95 V的起始电位，与商业Pt/C催化剂相比，表现出优越的稳定性和耐久性。与商业Pt/C催化剂相比，这是上级的稳定性和耐久性。该催化剂的优异性能有望在不久的将来成为可持续和大规模工业能源转换和储存过程的潜在候选者。
Efficient biomass-derived carbon have large potential as alternative to metal-based catalysts for oxygen reduction reaction (ORR). This study demonstrates a feasible strategy to largely prepare enteromorpha (EP) derived biochar with N, S embedded graphene-like structure anchored, which is firstly used as efficient metal-free electrocatalyst for ORR. Omitting the selection and classification of raw material as well as further additional activation and/or modification by dopants, the preparation process was merely adjusted via pyrolysis and acid etching. The obtained catalyst with low content of N (3.80 at%), S (1.00 at%) and large surface area (778.2 m2g−1) exhibited an onset potential of 0.95 V vs RHE in a four electron pathway, which showed superior stability and durability compared to that of commercial Pt/C catalyst. The outstanding performance of the catalyst is expected to be a potential candidate for sustainable and large-scale industrial energy conversion and storage processes in the near future.