TY - JOUR
T1 - Ultrahigh-Content Nitrogen-doped Carbon Encapsulating Cobalt NPs as Catalyst for Oxidative Esterification of Furfural
AU - Wang, Ting
AU - Ma, Hong
AU - Liu, Xin
AU - Luo, Yang
AU - Zhang, Shujing
AU - Sun, Yuxia
AU - Wang, Xinhong
AU - Gao, Jin
AU - Xu, Jie
N1 - Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/5/2
Y1 - 2019/5/2
N2 - It is an attractive and challenging topic to endow non-noble metal catalysts with high efficiency via a nitrogen-doping approach. In this study, a nitrogen-doped carbon catalyst with high nitrogen content encapsulating cobalt NPs (CoO x @N-C(g)) was synthesized, and characterized in detail by XRD, HRTEM, N 2 -physisorption, ICP, CO 2 -TPD, and XPS techniques. g-C 3 N 4 nanosheets act as nitrogen source and self-sacrificing templates, giving rise to an ultrahigh nitrogen content of 14.0 %, much higher than those using bulk g-C 3 N 4 (4.4 %) via the same synthesis procedures. As a result, CoO x @N-C(g) exhibited the highest performance in the oxidative esterification of biomass-derived platform furfural to methylfuroate under base-free conditions, achieving 95.0 % conversion and 97.1 % selectivity toward methylfuroate under 0.5 MPa O 2 at 100 °C for 6 h, far exceeding those of other cobalt-based catalysts. The high efficiency of CoO x @N-C(g) was closely related to its high ratio of pyridinic nitrogen species that may act as Lewis basic sites as well as its capacity for the activation of dioxygen to superoxide radical O 2 .− .
AB - It is an attractive and challenging topic to endow non-noble metal catalysts with high efficiency via a nitrogen-doping approach. In this study, a nitrogen-doped carbon catalyst with high nitrogen content encapsulating cobalt NPs (CoO x @N-C(g)) was synthesized, and characterized in detail by XRD, HRTEM, N 2 -physisorption, ICP, CO 2 -TPD, and XPS techniques. g-C 3 N 4 nanosheets act as nitrogen source and self-sacrificing templates, giving rise to an ultrahigh nitrogen content of 14.0 %, much higher than those using bulk g-C 3 N 4 (4.4 %) via the same synthesis procedures. As a result, CoO x @N-C(g) exhibited the highest performance in the oxidative esterification of biomass-derived platform furfural to methylfuroate under base-free conditions, achieving 95.0 % conversion and 97.1 % selectivity toward methylfuroate under 0.5 MPa O 2 at 100 °C for 6 h, far exceeding those of other cobalt-based catalysts. The high efficiency of CoO x @N-C(g) was closely related to its high ratio of pyridinic nitrogen species that may act as Lewis basic sites as well as its capacity for the activation of dioxygen to superoxide radical O 2 .− .
KW - cobalt
KW - furfural
KW - g-C N nanosheets
KW - nanoparticles
KW - nitrogen-doped carbon
KW - oxidative esterification
UR - https://www.scopus.com/pages/publications/85063690961
U2 - 10.1002/asia.201900099
DO - 10.1002/asia.201900099
M3 - Article
C2 - 30854805
AN - SCOPUS:85063690961
SN - 1861-4728
VL - 14
SP - 1515
EP - 1522
JO - Chemistry - An Asian Journal
JF - Chemistry - An Asian Journal
IS - 9
ER -