|Title||N,B-codoped defect-rich graphitic carbon nanocages as high performance multifunctional electrocatalysts|
|Affiliation||Yanshan Univ, Key Lab Appl Chem, Qinhuangdao 066004, Peoples R China.|
Peking Univ, Coll Engn, Dept Mat Sci & Engn, BKLMMD, Beijing 100871, Peoples R China.
Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China.
Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China.
Shanghai Univ, Inst Sustainable Energy, Shanghai 200444, Peoples R China.
Yanshan Univ, Key Lab Appl Chem, Qinhuangdao 066004, Peoples R China.
Hou, YL (reprint author), Peking Univ, Coll Engn, Dept Mat Sci & Engn, BKLMMD, Beijing 100871, Peoples R China.
Li, YG (reprint author), Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China.
OXYGEN REDUCTION REACTION
HYDROGEN EVOLUTION REACTION
SUPERIOR BIFUNCTIONAL ELECTROCATALYSTS
|Citation||NANO ENERGY. 2017, 42, 334-340.|
|Abstract||Nanocarbon materials recognized as effective and inexpensive catalysts for independent electrochemical reactions, are anticipated to possess a broader spectrum of multifunctionality toward oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). A rational design of trifunctional nanocarbon catalyst requires balancing the heteroatoms-doping and defect-engineering to afford desired active centers and satisfied electric conductivity, which however is conceptually challenging while desires in-depth research both experimentally and theoretically. This work reports a N,B-codoped graphitic carbon nanocage (NB-CN) with graphitic yet defect-rich characteristic as a promising trifunctional electrocatalyst through a facile thermal pyrolysis assisted in-situ catalytic graphitization (TPCG) process. Density functional theory (DFT) calculations are conducted, for the first time, to demonstrate that the best performance for ORR/OER and HER can be originated from the configuration with B meta to a pyridinic-N, which presents a minimum theoretical overpotential of 0.34 V for ORR, 0.39 V for OER, and a lowest Gibbs free-energy (Delta G(ads)) of 0.013 eV for HER. A primary zinc-air battery is assembled presenting a maximum power density of 320 mW cm(-2) along with excellent operation durability, evidencing great potential in practical applications.|
|Appears in Collections:||工学院|