期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 9, 期 39, 页码 13324-13336出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.1c04745
关键词
trifunctional electrocatalysis; defect-rich carbon; polyphenylene sulfide; rechargeable Zn-air batteries; water splitting
资金
- National Natural Science Foundation of China [21676202, 21878231, 51802216]
- Natural Science Foundation of Tianjin [19JCZDJC37300]
- Tianjin Research Innovation Project for Postgraduate Students [2020YJSB152]
- TGU Grant for Fiber Studies [TGF-21-A6]
- Tianjin College Student Innovation and Entrepreneurship Training Program [202010058024]
- China National Textile and Apparel Council [J201406]
This study presents a new type of porous carbon doped with Cu, N, S as a trifunctional catalyst, which exhibits excellent electrocatalytic performance and stability for the ORR, OER, and HER reactions, surpassing noble metals in certain aspects. The catalyst shows promising potential for applications in Zn-air batteries and overall water splitting, demonstrating superior performance. The synthesis method offers opportunities for new catalyst design and discovery, enabling versatile and robust energy applications.
Fuel cells and water splitting are promising sustainable energy storage and conversion systems that can facilitate the usage of renewable resources and reduce the reliance on fossil fuels. These applications require catalysts to perform the required oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). It would be ideal to use a non-noble metal-based multifunctional catalyst for these reactions. Herein, a new type of porous carbon doped with Cu, N, S was prepared as a trifunctional catalyst for the ORR, OER, and HER from S-rich polyphenylene sulfide (PPS). By oxidatively treating the PPS, we critically prevented high-temperature melting of the precursor. Further, high-temperature pyrolysis using ammonia (NH3) desulfurized and introduced N into the carbon matrix, increasing structural defects and the surface area. By introducing copper during the pyrolysis, the tridoped (Cu, N, S) catalyst was successfully synthesized. The extremely large number of active sites and the local chemical environment enable excellent electrocatalytic performance and stability across ORR, OER, and HER at levels superior or comparable to noble metals. This catalyst was also used as the sole catalyst in Zn-air batteries and overall water splitting to demonstrate excellent performance. This synthesis method can pave the way toward new catalyst design and discovery, enabling more versatile and robust energy applications.
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