《Zinc-Mediated Template Synthesis of Fe-N-C Electrocatalysts with Densely Accessible Fe-Nx Active Sites for Efficient Oxygen Reduction》 was written by Chen, Guangbo; Liu, Pan; Liao, Zhongquan; Sun, Fanfei; He, Yanghua; Zhong, Haixia; Zhang, Tao; Zschech, Ehrenfried; Chen, Mingwei; Wu, Gang; Zhang, Jian; Feng, Xinliang. SDS of cas: 141-86-6 And the article was included in Advanced Materials (Weinheim, Germany) in 2020. The article conveys some information:
Owing to their earth abundance, high atom use, and excellent activity, single Fe atoms dispersed on N-doped carbons (Fe-N-C) have emerged as appealing alternatives to noble-metal Pt for catalyzing the O reduction reaction (ORR). However, the ORR activity of current Fe-N-C is seriously limited by the low d. and inferior exposure of active Fe-Nx species. Here, a novel Zn-mediated template synthesis strategy is demonstrated for constructing densely exposed Fe-Nx moieties on hierarchically porous C (SA-Fe-NHPC). During the thermal treatment of 2,6-diaminopyridine/ZnFe/SiO2 complex, the Zn prevents the formation of Fe carbide nanoparticles and the SiO2 template promotes the generation of hierarchically pores for substantially improving the accessibility of Fe-Nx moieties after subsequent leaching. As a result, the SA-Fe-NHPC electrocatalysts exhibit an unprecedentedly high ORR activity with a half-wave potential (E1/2) of 0.93 V in a 0.1 M KOH aqueous solution, which outperforms those for Pt/C catalyst and state-of-the-art noble metal-free electrocatalysts. As the air electrode in Zn-air batteries, the SA-Fe-NHPC demonstrates a large peak power d. of 266.4 mW cm-2 and superior long-term stability. Therefore, the developed Zn-mediated template synthesis strategy for boosting the d. and accessibility of Fe-Nx species paves a new avenue toward high-performance ORR electrocatalysts. In the experiment, the researchers used 2,6-Diaminopyridine(cas: 141-86-6SDS of cas: 141-86-6)
2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.SDS of cas: 141-86-6