Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 246, Issue -, Pages 89-99Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.01.050
Keywords
Protein hydrogels; Metal-free electrocatalysts; Heteroatom-doped carbon; Hierarchically porous carbon; Oxygen reduction reaction
Funding
- National Natural Science Foundation of China [21636010, 21878342]
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China
- China Postdoctoral Science Foundation [2018M64300]
- Postdoctoral Seience Foundation of Central South University [205440]
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TIPC, CAS, Beijing, China [PCOM201816]
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It is of great allure but still challenging to construct carbon-based metal free electrocatalysts to replace Pt-based ones for efficient ORR in both acidic and alkaline media. In this work, protein-hydrogel networks are demonstrated as a precursor for preparing N, S-codoped, hierarchically porous carbon (NSPC) materials with tunable pore structure. Of note, NSPC-0.2-900 possesses a high pore volume of 0.8552 cm(3) g(-1) and shows excellent ORR activity in both alkaline (E-onset, similar to 0.93 vs. RHE) and acidic (E-onset, similar to 0.89 V vs RHE) media. As a cathode catalyst for zinc-air batteries, NSPC exhibits higher power density and better long-term durability than Pt/C does. The work presents a great potential of using protein as a precursor for preparing heteroatom doped, hierarchically porous carbon materials for energy and environmental applications.
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