Rational design of a highly active electrocatalyst for the oxygen reduction reaction (ORR) is critical for several advanced energy conversion and storage technologies such as fuel cells and rechargeable metal–air batteries. Engineering carbonaceous materials with heteroatoms can achieve optimal electronic and porous structures and show considerable electrocatalytic performance. In this work, a facile and highly efficient method for nitrogen and sulfur incorporation into a carbon skeleton has been developed based on CdS-polydopamine composites to derive the N,S-codoped hierarchical porous carbons. CdS plays an important role in the formation of this unique structure and the sulfur doping. Through pyrolyzing under inert atmosphere, the CdS-polydopamine can be easily transformed into N- and S-codoped porous carbons. The resultant N,S-codoped carbons possess hierarchically porous structures with high specific surface area, demonstrating superior ORR performance, which is higher than that of a commercial Pt/C catalyst in alkaline media in terms of onset potential, half-wave potential, and diffuse-limiting current density. The high ORR performance is also shown in both neutral and acidic media. In addition, the much higher stability and better methanol tolerance than Pt/C allow them to be a potential candidates for large-scale practical applications.

中文翻译：

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CdS-聚多巴胺衍生的N，S-掺杂的多级多孔碳作为还原氧的高活性电催化剂

合理设计用于氧还原反应（ORR）的高活性电催化剂对于几种先进的能量转换和存储技术（例如燃料电池和可充电金属空气电池）至关重要。具有杂原子的工程碳质材料可以实现最佳的电子结构和多孔结构，并显示出可观的电催化性能。在这项工作中，已经开发了一种基于CdS-聚多巴胺复合材料的氮和硫掺入碳骨架的简便高效的方法，可以得到N，S掺杂的分级多孔碳。CdS在这种独特结构的形成和硫掺杂中起着重要作用。通过在惰性气氛下热解，CdS-聚多巴胺可轻松转化为N和S掺杂的多孔碳。结果N S掺杂的碳具有高比表面积的分层多孔结构，显示出优异的ORR性能，在碱性电介质中的起始电势，半波电势和扩散限制电流方面，其ORR性能高于市售Pt / C催化剂。密度。在中性和酸性介质中也显示出高ORR性能。此外，比Pt / C高得多的稳定性和更好的甲醇耐受性使它们成为大规模实际应用的潜在候选者。在中性和酸性介质中也显示出高ORR性能。此外，比Pt / C高得多的稳定性和更好的甲醇耐受性使它们成为大规模实际应用的潜在候选者。在中性和酸性介质中也显示出高ORR性能。此外，比Pt / C高得多的稳定性和更好的甲醇耐受性使它们成为大规模实际应用的潜在候选者。