Premium
A N, P Dual‐Doped Carbon with High Porosity as an Advanced Metal‐Free Oxygen Reduction Catalyst
Author(s) -
Sun YaNan,
Zhang MingLi,
Zhao Li,
Sui ZhuYin,
Sun ZhenYu,
Han BaoHang
Publication year - 2019
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201900592
Subject(s) - catalysis , materials science , carbonization , mesoporous material , carbon fibers , chemical engineering , graphene , metal , aerogel , specific surface area , oxygen reduction reaction , inorganic chemistry , nanotechnology , chemistry , organic chemistry , composite number , electrode , metallurgy , electrochemistry , composite material , scanning electron microscope , engineering
Oxygen reduction reaction (ORR) is the critical reaction in metal–air batteries and fuel cells. This reaction suffers from sluggish kinetics and use of Pt‐based catalysts that are prohibitively expensive and in shortage of resource. Therefore, an alternative advanced metal‐free catalyst for ORR is highly desired. Herein, a N, P dual‐doped porous carbon (NPPC) with large surface area is obtained through the CO 2 activation of a novel N, P‐doped aerogel (NPA). Ascribed to the CO 2 activation of NPA, NPPC possesses a large Brunauer–Emmett–Teller specific surface area (2850 m 2 g −1 ) and N, P dual doping. CO 2 activation as an environmentally friendly method with no corrosion can not only produce abundant micropores and mesopores in NPPC, but also provide a positive influence for the transformation of N species from pyrrolic N to pyridinic and graphitic N, which can promote the ORR activities. Therefore, compared with carbonized NPA, NPPC exhibits a higher ORR activity, including a larger transfer electron number (3.95 at 0.2 V vs reversible hydrogen electrode). Additionally, NPPC possesses a much better long‐term stability compared with commercial 20 wt% Pt/C. This work gives an inspiration on the new strategy for preparing the future catalyst for ORR.