《Rational Design and Synthesis of Hierarchical Porous Mn-N-C Nanoparticles with Atomically Dispersed MnNx Moieties for Highly Efficient Oxygen Reduction Reaction》 was written by Wang, Yunqiu; Zhang, Xiaoran; Xi, Shibo; Xiang, Xue; Du, Yonghua; Chen, Pinsong; Lyu, Dandan; Wang, Shuangbao; Tian, Zhi Qun; Shen, Pei Kang. Application In Synthesis of 2,6-Diaminopyridine And the article was included in ACS Sustainable Chemistry & Engineering in 2020. The article conveys some information:
Developing transition-metal excluding iron and cobalt-nitrogen-carbon (M-N-C) electrocatalysts for the oxygen reduction reaction (ORR) is critical to substantially promote the development of precious-metal-free metal-air batteries and fuel cells. In the work, Mn-N-C nanoparticles with atomically dispersed MnNx moieties were synthesized by pyrolyzing Mn-ion-dual-pyridine coordinated complex, which was obtained via a simple condensation reaction between 2,6-diamino-pyridine and 2,6-diacetyl-pyridine with MnCl2 as the Mn source. The precursor features with a characteristic structure of dual-pyridine ligand, which possesses a strong coordinating capability for Mn2+, facilitating the formation of highly dispersed nitrogen-coordinated Mn sites (MnNx). Attributed to the highly active at. MnNx sites, hierarchical pore structure, and high surface area of the Mn-N-C derived from the new precursor, it exhibits outstanding ORR performance in 0.1 M KOH with an almost direct four-electron reaction path and high selectivity of O2 into H2O (low H2O2 production < 3.5%). The half-wave potential of Mn-N-C is 0.88 V vs. RHE, which is 20 mV higher than that of com. Pt/C catalyst and reaches to the level of Fe-N-C catalyst obtained by the same method. Meanwhile, the feasibility of Mn-N-C for practical application is validated by its higher-performance power output in Zn-air battery with a maximum power d. of 132 mW cm-2 compared to that of Pt/C (121 mW cm-2) using the same catalyst loading of 1.0 mg cm-2. This work develops a convenient route to develop non-Fe or Co-N-C electrocatalyst for the ORR. Highly efficient Mn-N-C electrocatalysts with atomically dispersed MnNx moieties were developed for oxygen reduction reaction in Zn-Air batteries. In the part of experimental materials, we found many familiar compounds, such as 2,6-Diaminopyridine(cas: 141-86-6Application In Synthesis of 2,6-Diaminopyridine)
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.Application In Synthesis of 2,6-Diaminopyridine