TY - JOUR
T1 - Hierarchically ordered macro-microporous metal-organic framework derived oxygen reduction electrocatalyst
AU - Zhang, Hongjuan
AU - Xia, Wei
AU - Ge, Jianping
AU - Tang, Jing
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/2/1
Y1 - 2022/2/1
N2 - The electrocatalytic performance of carbon-based materials determined by the active sites' density, accessibility, and utilization rate. In this work, ordered macroporous Fe-containing zeolitic-imidazole frameworks (Fe-ZIF) single-crystalline was carefully synthesized by confined growing Fe-ZIF in the interior space of closely-packed polystyrene sphere template. Then ordered macro-microporous carbon with atomically dispersed Fe-Nx sites (Fe-Nx/HPC) were successfully fabricated by direct carbonizing the ordered macroporous Fe-ZIF. The optimized catalyst Fe-Nx/HPC-1000 shows a high specific surface area of 1293 m2·g−1, a nitrogen and iron doping of 3.4 and 0.12 at.%, respectively. Thanks to the open and hierarchically porous structure, high specific surface area, and rich Fe-Nx moieties, Fe-Nx/HPC-1000 demonstrates outstanding oxygen reduction reaction (ORR) performance with an onset potential of 0.97 V, a half-wave potential of 0.881 V, and excellent durability. Secondary sulfur-doping was carried out to modify the properties of Fe-Nx/HPC-1000, which is favorable for ORR. These findings provide new insight into producing atomically dispersed Fe-Nx- and sulfur-modified MOF-derived ordered macroporous carbon electrocatalyst.
AB - The electrocatalytic performance of carbon-based materials determined by the active sites' density, accessibility, and utilization rate. In this work, ordered macroporous Fe-containing zeolitic-imidazole frameworks (Fe-ZIF) single-crystalline was carefully synthesized by confined growing Fe-ZIF in the interior space of closely-packed polystyrene sphere template. Then ordered macro-microporous carbon with atomically dispersed Fe-Nx sites (Fe-Nx/HPC) were successfully fabricated by direct carbonizing the ordered macroporous Fe-ZIF. The optimized catalyst Fe-Nx/HPC-1000 shows a high specific surface area of 1293 m2·g−1, a nitrogen and iron doping of 3.4 and 0.12 at.%, respectively. Thanks to the open and hierarchically porous structure, high specific surface area, and rich Fe-Nx moieties, Fe-Nx/HPC-1000 demonstrates outstanding oxygen reduction reaction (ORR) performance with an onset potential of 0.97 V, a half-wave potential of 0.881 V, and excellent durability. Secondary sulfur-doping was carried out to modify the properties of Fe-Nx/HPC-1000, which is favorable for ORR. These findings provide new insight into producing atomically dispersed Fe-Nx- and sulfur-modified MOF-derived ordered macroporous carbon electrocatalyst.
KW - Fe-N
KW - Nanoporous carbon
KW - Ordered macropore
KW - Oxygen reduction reaction
KW - Sulfur doping
UR - https://www.scopus.com/pages/publications/85114673750
U2 - 10.1016/j.cej.2021.132214
DO - 10.1016/j.cej.2021.132214
M3 - 文章
AN - SCOPUS:85114673750
SN - 1385-8947
VL - 429
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 132214
ER -