TY - JOUR
T1 - Anchoring a Co/2-methylimidazole complex on ion-exchange resin and its transformation to Co/N-doped carbon as an electrocatalyst for the ORR
AU - Zhu, Yexin
AU - Miyake, Koji
AU - Shu, Yasuhiro
AU - Gabe, Atsushi
AU - Hirota, Yuichiro
AU - Uchida, Yoshiaki
AU - Tanaka, Shunsuke
AU - Morallón, Emilia
AU - Cazorla-Amorós, Diego
AU - Nishiyama, Norikazu
N1 - Funding Information:
We would like to thank the GHAS laboratory at Osaka University for the XRD measurements. The TEM measurement was carried out using a facility in the Research Center for Ultrahigh Voltage Electron Microscopy, Osaka University. Financial support from MINECO (CTQ2015-66080-R) and HEIWA NAKAJIMA FOUNDATION is acknowledged.
Publisher Copyright:
© 2019 The Royal Society of Chemistry.
PY - 2019
Y1 - 2019
N2 - Synthesizing high-activity metal/heteroatom-co-doped carbon (M/H-C) electrocatalysts for the oxygen reduction reaction (ORR) is critical for the commercialization of fuel cells, but remains challenging because of the difficulty in making highly dispersed (M/H-C) electrocatalysts. Herein, a commercial ion-exchange resin, Amberlyst 15, is used as a support, and Co/2-methylimidazole is anchored on the ion-exchange site of the support to obtain Co/N/Amb as the precursor of the M/H-C electrocatalyst. After the precursor is pyrolyzed and converted into Co/N/C materials, it is activated with CO 2 , and the obtained material (act-Co/N/C) exhibits remarkable ORR activity with a high onset potential of 0.943 V (vs. the reversible hydrogen electrode) and an excellent kinetic current density comparable to commercial 5 wt% Pt/C in an alkaline medium. The favorable activity is mainly attributed to the ultra-dispersed CoN x and high porosity of act-Co/N/C. Our synthetic strategy could be applied to the preparation of other well-dispersed M/H-C materials. This work opens a new direction in the synthetic strategy of carbon materials.
AB - Synthesizing high-activity metal/heteroatom-co-doped carbon (M/H-C) electrocatalysts for the oxygen reduction reaction (ORR) is critical for the commercialization of fuel cells, but remains challenging because of the difficulty in making highly dispersed (M/H-C) electrocatalysts. Herein, a commercial ion-exchange resin, Amberlyst 15, is used as a support, and Co/2-methylimidazole is anchored on the ion-exchange site of the support to obtain Co/N/Amb as the precursor of the M/H-C electrocatalyst. After the precursor is pyrolyzed and converted into Co/N/C materials, it is activated with CO 2 , and the obtained material (act-Co/N/C) exhibits remarkable ORR activity with a high onset potential of 0.943 V (vs. the reversible hydrogen electrode) and an excellent kinetic current density comparable to commercial 5 wt% Pt/C in an alkaline medium. The favorable activity is mainly attributed to the ultra-dispersed CoN x and high porosity of act-Co/N/C. Our synthetic strategy could be applied to the preparation of other well-dispersed M/H-C materials. This work opens a new direction in the synthetic strategy of carbon materials.
UR - http://www.scopus.com/inward/record.url?scp=85061195609&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85061195609&partnerID=8YFLogxK
U2 - 10.1039/c8cy02210k
DO - 10.1039/c8cy02210k
M3 - Article
AN - SCOPUS:85061195609
SN - 2044-4753
VL - 9
SP - 578
EP - 582
JO - Catalysis Science and Technology
JF - Catalysis Science and Technology
IS - 3
ER -