It is of great importance to find non-precious metal based oxygen reduction reaction (ORR) catalysts with high stability, high performance and low cost. In this context, hierarchically porous carbon-based nanomaterials doped with heteroatoms are regarded as one of promising catalysts for ORR. Herein, a bottom-up approach is proposed by using the initial MOF-derived CoO@ZIF-67 core-shell structure as a template to obtain hollow cobalt-anchored N-doped carbon material followed by acid etching (A-CoNC). It exhibits a type of hollow porous nitrogen-carbon network anchored by well-dispersed atomic Co-N_x sites with high activity and stable catalytic performance. The as-obtained A-CoNC shows high electrocatalytic ORR activity, good reaction selectivity with the low Tafel slope of 55.5 mV dec⁻¹, large limited current density of 5.37 mA cm⁻² and excellent long-term stability (retention = 96.1%, time = 10 h). Furthermore, A-CoNC can also be serving as efficient electrocatalysts for zinc-air battery with a high power density of 144.0 mW cm⁻². Our synthetic strategy from the MOF-derived core-shell structure to ORR electrocatalyst provides new pathway for the design and preparation of highly efficient electro-/photo-catalysts stemmed from MOFs materials.

寻找具有高稳定性，高性能和低成本的基于非贵金属的氧还原反应（ORR）催化剂是非常重要的。在这种情况下，掺杂杂原子的分层多孔碳基纳米材料被认为是ORR的有前途的催化剂之一。在本文中，提出了一种自底向上的方法，该方法使用初始的源自MOF的CoO @ ZIF-67核-壳结构作为模板，以获得中空钴锚定的N掺杂碳材料，然后进行酸蚀刻（A-CoNC）。它表现出一种由良好分散的Co-N _x原子位点锚定的中空多孔氮碳网络，具有高活性和稳定的催化性能。获得的A-CoNC显示出高的电催化ORR活性，良好的反应选择性以及55.5 mV dec ^-1的低Tafel斜率，5.37 mA cm ^-2的大极限电流密度和出色的长期稳定性（保留= 96.1％，时间= 10 h）。此外，A-CoNC还可以用作具有144.0 mW cm ^-2的高功率密度的锌-空气电池的有效电催化剂。我们从MOF衍生的核-壳结构到ORR电催化剂的合成策略为设计和制备源自MOFs材料的高效电/光催化剂提供了新途径。