TY - JOUR
T1 - Oxygen Reduction Reaction of Block Copolymer Template-Directed Porous Carbon Catalysts
AU - Septani, Cindy Mutiara
AU - Wang, Chun Chieh
AU - Sun, Ya Sen
N1 - Funding Information:
Financial support from the Ministry of Science and Technology (MOST 107-2221-E-008-034-MY3) is acknowledged. We appreciate that the SAXS instrument (NanoViewer, Rigaku) at National Central University (NCU) enables us to preliminary measure the carbonized samples. We also thank Dr. Chun-Jen Su, Dr. U-Ser Jeng, Dr. Jhih-Min Lin and Dr. Chun-Yu Chen for their assistance in the SAXS measurements at NSRRC. This work benefited from the use of the SasView application, originally developed under NSF award DMR-0520547. SasView contains code developed with funding from the European Union’s Horizon 2020 research and innovation programme under the SINE2020 project, grant agreement No 654000.
Publisher Copyright:
© 2021 American Chemical Society.
PY - 2022/1/24
Y1 - 2022/1/24
N2 - Functional nitrogen-doped hierarchically porous carbon materials (NHPCMs) have received much attention in recent years because of their electrochemical and catalytic activities, which offer potential applications in the field of fuel cells. Herein we demonstrate the NHPCMs with superior performance of the oxygen reduction reaction (ORR) through spontaneous coassembly of polystyrene-block-poly(ethylene oxide) (PS-b-PEO) micelles along with self-polymerization of dopamine (DA). In this study, we aim to deeply understand the effects of HCl addition, DA content, and aging environment on morphologies of NHPCMs through studying self-assembly and phase behavior of PS-b-PEO/DA mixtures in cosolvent using synchrotron small-angle X-ray scattering and transmission X-ray microscopy. The morphology of hierarchical pores can be successfully obtained by fine controls over DA content and pyrolysis temperature. Correlations of morphologies and processes with the ORR performance indicate that hierarchically porous carbon materials exhibit the highest ORR performance with Jk = 8.1 mA cm-2 (measured at -0.4 V of SCE), low onset potential η = -0.11 V, and four-electron transfer pathway over a wide voltage range.
AB - Functional nitrogen-doped hierarchically porous carbon materials (NHPCMs) have received much attention in recent years because of their electrochemical and catalytic activities, which offer potential applications in the field of fuel cells. Herein we demonstrate the NHPCMs with superior performance of the oxygen reduction reaction (ORR) through spontaneous coassembly of polystyrene-block-poly(ethylene oxide) (PS-b-PEO) micelles along with self-polymerization of dopamine (DA). In this study, we aim to deeply understand the effects of HCl addition, DA content, and aging environment on morphologies of NHPCMs through studying self-assembly and phase behavior of PS-b-PEO/DA mixtures in cosolvent using synchrotron small-angle X-ray scattering and transmission X-ray microscopy. The morphology of hierarchical pores can be successfully obtained by fine controls over DA content and pyrolysis temperature. Correlations of morphologies and processes with the ORR performance indicate that hierarchically porous carbon materials exhibit the highest ORR performance with Jk = 8.1 mA cm-2 (measured at -0.4 V of SCE), low onset potential η = -0.11 V, and four-electron transfer pathway over a wide voltage range.
UR - https://www.scopus.com/pages/publications/85122746353
UR - https://www.scopus.com/pages/publications/85122746353#tab=citedBy
U2 - 10.1021/acsaem.1c03321
DO - 10.1021/acsaem.1c03321
M3 - Article
AN - SCOPUS:85122746353
SN - 2574-0962
VL - 5
SP - 897
EP - 914
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 1
ER -