Cu-assisted induced atomic-level bivalent Fe confined on N-doped carbon concave dodecahedrons for acid oxygen reduction electrocatalysis
| Autor: | Guiqiang Cao, Lai Qingxue, Yan Luo, Da Bi, Liang Yanyu, Xiaohong Li, Adeline Loh, Zeming Tang, David P. Trudgeon |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology Proton exchange membrane fuel cell 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrocatalyst 01 natural sciences Bivalent (genetics) 0104 chemical sciences Catalysis Dodecahedron Fuel Technology Chemical engineering Transition metal Specific surface area Reversible hydrogen electrode 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 46:1997-2006 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.10.058 |
| Popis: | Atomically dispersed transition metals anchored on N-doped carbon have been successfully developed as promising electrocatalysts for acidic oxygen reduction reaction (ORR). Nonetheless, how to introduce and construct single-atomic active sites is still a big challenge. Herein, a novel concave dodecahedron catalyst of N-doped carbon (FeCuNC) with well confined atomically dispersed bivalent Fe sites was facilely developed via a Cu-assisted induced strategy. The obtained catalyst delivered outstanding ORR performance in 0.5 M H2SO4 media with a half-wave potential (E1/2) of 0.82 V (vs reversible hydrogen electrode, RHE), stemming from the highly active bivalent Fe-Nx sites with sufficient exposure and accessibility guaranteed by the high specific surface area and curved surface. This work provides a simple but efficient metal-assisted induced strategy to tune the configurations of atomically dispersed active sites as well as microscopy structures of carbon matrix to develop promising PGM-free catalysts for proton exchange membrane fuel cell (PEMFC) applications. |
| Databáze: | OpenAIRE |
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