Hydrogen energy storage and transportation are critical issues that must be addressed to ensure the development of alternatives to fossil fuel energy in the future. Herein, the poly(Schiff base) strategy is used to explore the carbon substrate, which is enclosed with binary metal Fe and Co as precursors. After the calcination and acid treatment steps, one of the FeCo alloy, termed FeCoNC-1000A900, was assembled with porous carbon skeleton as a shell and enclosed with FeCo alloy as a core. The FeCoNC-1000A900 exhibits outstanding H2 capture properties from NaBH4/EtOH mixtures circumstance owing to its large average particle size of 45 nm and high specific surface area of 462.07 m2/g. Notably, the FeCoNC-1000A900 acquires bi-functional catalysis efficacy, one is for chemoselectivity in the hydrogenation of nitroarene substrates and shows a high turnover frequency in 690 h−1 within the overall conversion yield. The other one is the O2 capture performance toward the oxygen reduction reaction with the excellent onset potential of 0.89 V, the half-wave potential of 0.77 V, and limiting current density of − 5.56 mA cm−2, which are comparable to those of the commercial Pt/C catalyst. In addition, the Tafel slope of 79.6 mV dec−1 is lower than those for other catalysts. Consequently, the development of the novel FeCoNC-1000A900 catalyst has two functional applications.

中文翻译：

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多功能捕氢捕氧 FeCo-NC 催化剂，改善硝基芳烃加氢和 ORR 活性


氢能的储存和运输是确保未来开发化石燃料能源替代品必须解决的关键问题。在此，采用聚希夫碱策略来探索以二元金属 Fe 和 Co 作为前驱体封闭的碳基底。经过煅烧和酸处理步骤后，一种名为 FeCoNC-1000A900 的 FeCo 合金以多孔碳骨架作为壳组装而成，并用 FeCo 合金作为核进行封装。 FeCoNC-1000A900 由于其 45 nm 的大平均粒径和 462.07 m2/g 的高比表面积，在 NaBH4/EtOH 混合物环境中表现出出色的 H2 捕获性能。值得注意的是，FeCoNC-1000A900 具有双功能催化功效，其一是硝基芳烃底物氢化中的化学选择性，并且在总转化率内显示出 690 h−1 的高周转频率。另一个是氧还原反应的O2捕获性能，其优异的起始电位为0.89 V，半波电位为0.77 V，极限电流密度为− 5.56 mA cm−2，与O2捕获性能相当。商业 Pt/C 催化剂。此外，79.6 mV dec−1 的塔菲尔斜率低于其他催化剂。因此，新型 FeCoNC-1000A900 催化剂的开发具有两个功能应用。