Oxygen reduction reaction (ORR) plays a key role in the application of fuel cells. Here, we used shaddock peel to fabricate a set of N, P dual-doped hierarchical porous carbons, abbreviated as NPSPs, where the carbons were carbonized, activated and dual-doped via a simple one-step pyrolyzation. Contrast results indicate the contents of pyridinic-N, graphitic-N and P–C species increase with the rising of temperatures, and the temperature also affects the degree of graphitization, surface area, morphology, thus influences the ORR performance. More importantly, the NPSP-900 demonstrates an outstanding ORR activity with a comparable half-wave potential (0.83 V vs. RHE) and higher current density with respect to commercial Pt/C, following 4e transfer pathway. Our work illustrates that NPSP-900 is a promising cathode for fuel cells because of its simple preparation, waste utilization, excellent ORR performance, good methanol tolerance and superior stability.

氧还原反应（ORR）在燃料电池的应用中起着关键作用。在这里，我们用柚子皮制作了一组N，P双掺杂的分级多孔碳，缩写为NPSP，其中碳通过简单的一步热解进行碳化，活化和双掺杂。对比结果表明，吡啶-N，石墨-N和P–C种类的含量随温度的升高而增加，温度还影响石墨化程度，表面积，形态，从而影响ORR性能。更重要的是，NPSP-900遵循4e转移途径，具有出色的ORR活性，具有可比的半波电势（相对于RHE为0.83 V）和相对于商业Pt / C更高的电流密度。