TY  - JOUR
A1  - Petitdemange, Eliot
A1  - Zhu, Jinjie
A1  - Pedersen, Angus
A1  - Parker, Joseph
A1  - Balaghi, Esmael
A1  - Li, Shaohua
A1  - Favero, Silvia
A1  - Ignacio Martínez, José
A1  - Haigh, Sarah
A1  - Titirici, Maria-Magdalena
A1  - Fischer, Anna
A1  - Barrio, Jesús
T1  - High-Yield Synthesis of Fe-NC Electrocatalysts Using Mg2+ Templating and Schiff-Base Porous Organic Polymers
JF  - Advanced Functional Materials
N2  - The decoupled synthesis of Fe-NC single-site electrocatalysts mediated by Lewis acids enables high active site density and utilization. However, current approaches often rely on small organic molecules and suffer from low synthesis yields due to the high Lewis acid-to-precursor ratios required to achieve highly porous carbons. Here, a porous organic polymer (POP) based on 2,4,6-Triaminopyrimidine (TAP) is utilized as a carbon-nitrogen-based scaffold for the synthesis of Fe─NC electrocatalysts. By tuning the amounts of MgCl2 ·6H2O used both as porogen and active site templating agent, synthetic yields exceeding 45% are achieved, a significant improvement compared to the 6% yield from the molecular analogue and the highest reported forMg2+ templated systems. Subsequent low-temperature exchange with Fe leads to atomically dispersed FeNx, minimizing Fe aggregation. The resulting materials exhibit high specific surface areas (>1000 m2 g−1) with micro-, meso-, and macropores, which promote mass transport and active site accessibility. Compared to Fe─NC synthesized via direct pyrolysis of Fe-coordinated POP, the decoupled method enables significantly higher catalytic activity in both alkaline and acidic media, and delivers 1 A cm−2 at 0.687 ± 0.004 VRHE in an alkaline gas diffusion electrode, highlighting its potential for practical oxygen reduction devices.
KW  - Porous Organic Polymers
KW  - Single Atom
KW  - Oxygen reduction
PY  - 2025
UR  - https://nbn-resolving.org/urn:nbn:de:kobv:b43-652618
DO  - https://doi.org/10.1002/adfm.202518944
SN  - 1616-3028
SP  - 1
EP  - 15
PB  - Wiley-VCH GmbH
AN  - OPUS4-65261
LA  - eng
AD  - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER  -