Abstract The performance polymer electrolyte membrane fuel cells (PEMFCs) and alkaline fuel cells (AFCs) relays on the kinetics of oxygen reduction reaction at the cathode side of the fuel cell. Efficient electrocatalyst with high activity and selectivity are of great importance to achieve ORR with four-electron reaction pathway. Targeting robust and cost-effective alternatives to noble metal electrocatalysts, we skillfully fabricated nitrogen doped carbon supported cobalt phosphide (N-C@CoP) nanorod arrays as an earth abundant material for catalyzing ORR. The obtained N-C@CoP composite with relatively high surface area and favorable mesoporous features exhibits intriguing ORR catalytic performances in alkaline conditions due to ease mass diffusion, fast charge transport, and abundance of electroactive sites as a result of doped nitrogen moieties. In addition, the composite catalyst exhibits remarkable durability through an 80,000 s test compared to benchmark Pt catalyst, demonstrating excellent structure stability. The enhanced ORR performances of N-C@CoP catalyst suggest it as a potential non-Pt containing electrocatalyst for efficient ORR.

中文翻译：

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氮和碳功能化的磷化钴作为碱性环境下氧还原反应电催化的高效非贵重电催化剂

摘要 高性能聚合物电解质膜燃料电池 (PEMFC) 和碱性燃料电池 (AFC) 依赖于燃料电池阴极侧的氧还原反应动力学。具有高活性和选择性的高效电催化剂对于通过四电子反应途径实现 ORR 具有重要意义。针对贵金属电催化剂的稳健且具有成本效益的替代品，我们巧妙地制造了氮掺杂碳负载磷化钴 (NC@CoP) 纳米棒阵列，作为用于催化 ORR 的地球丰富材料。获得的具有较高表面积和良好介孔特征的 NC@CoP 复合材料在碱性条件下表现出引人入胜的 ORR 催化性能，因为容易质量扩散、快速电荷传输以及由于掺杂的氮部分导致的大量电活性位点。此外，与基准 Pt 催化剂相比，该复合催化剂在 80,000 秒的测试中表现出卓越的耐久性，表现出优异的结构稳定性。NC@CoP 催化剂增强的 ORR 性能表明它是一种潜在的不含 Pt 的电催化剂，可实现高效的 ORR。