Details

Autor(en) / Beteiligte

• ul Haq, Mahmood
• Wu, Dong-Hui
• Ajmal, Zeeshan
• Ruan, Qi-Dong
• Khan, Shahid
• Zhang, Lu
• Wang, Ai-Jun
• Feng, Jiu-Ju

Titel

Derived-2D Nb4C3Tx sheets with interfacial self-assembled Fe-N-C single-atom catalyst for electrocatalysis in water splitting and durable zinc-air battery

Ist Teil von

• Applied catalysis. B, Environmental, 2024-05, Vol.344, p.123632, Article 123632

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In pursuit of advanced nanocatalysts with multifunctionality, cost-effectiveness and durability for water splitting and zinc-air batteries, we unveil a novel strategy by combination of electrochemically etched Nb4C3Tx-MXene nanosheets with Fe-N-C single-atom catalyst. The resultant Fe-N-C/Nb4C3Tx demonstrates exceptional electrocatalytic performances for the ORR (E1/2 = 0.911 V), OER (η10 = 1.52 V), and HER (η10 = 91 mV) in the alkaline media. Besides, the catalyst shows excellent application in water splitting electrolyzer, only requiring 1.58 V for a current density of 10 mA cm−2. Further, the Fe-N-C/Nb4C3Tx assembled battery displays an open-circuit voltage of 1.51 V, a higher peak power density (136 mW cm−2), a narrower polarization gap (0.85 V), and remarkable stability (660 cycles over 220 h), surpassing the Pt/C + RuO2 based counterpart. Our study integrates DFT calculations to guide the catalyst design, laying the foundation for development of reliable and effective trifunctional catalysts in advanced energy-related systems. [Display omitted] •Nb4C3Tx-MXene sheets with self-assembled Fe-N-C single-atom catalyst were prepared.•The Fe-N-C/Nb4C3Tx showed highly efficient catalytic activities for ORR, OER and HER.•The trifunctional catalyst was employed in water splitting and Zn-air battery.•Theoretical calculations further confirmed the active sites of the catalysts.