Surface‐Modified Porous Carbon Nitride Composites as Highly Efficient Electrocatalyst for Zn‐Air Batteries,Advanced Energy Materials

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Surface‐Modified Porous Carbon Nitride Composites as Highly Efficient Electrocatalyst for Zn‐Air Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2017-09-14 , DOI: 10.1002/aenm.201701642
Wenhan Niu ₁ , Zhao Li ₂ , Kyle Marcus _{1,

2} , Le Zhou ₁ , Yilun Li ₃ , Ruquan Ye ₃ , Kun Liang ₁ , Yang Yang _{1,

2}

Affiliation

Porous carbon nitride (PCN) composites are fabricated using a top‐down strategy, followed by additions of graphene and CoS_x nanoparticles. This subsequently enhances conductivity and catalytic activity of PCN (abbreviated as CoS_x@PCN/rGO) and is achieved by one‐step sulfuration of PCN/graphene oxides (GO) composite materials. As a result, the as‐prepared CoS_x@PCN/rGO catalysts display excellent activity and stability toward both oxygen evolution and reduction reactions, surpassing electrocatalytic performance shown by state‐of‐the‐art Pt, RuO₂ and other carbon nitrides. Remarkably, the CoS_x@PCN/rGO bifunctional activity allows for applications in zinc‐air batteries, which show better rechargeability than Pt/C. The enhanced catalytic performance of CoS_x@PCN/rGO can primarily be attributed to the highly porous morphology and sufficiently exposed active sites that are favorable for electrocatalytic reactions.

中文翻译：

表面改性的氮化碳多孔复合材料，作为锌空气电池的高效电催化剂

多孔碳氮化物（PCN）复合材料是采用自上而下的策略制造的，然后添加石墨烯和CoS _x纳米颗粒。随后，这可以增强PCN（缩写为CoS _x @ PCN / rGO）的电导率和催化活性，并通过PCN /氧化石墨烯（GO）复合材料的一步硫化来实现。结果，所制备的CoS _x @ PCN / rGO催化剂对氧气的释放和还原反应均显示出出色的活性和稳定性，超过了最新的Pt，RuO ₂和其他碳氮化物所显示的电催化性能。值得注意的是，CoS _x@ PCN / rGO的双功能活性使其可用于锌-空气电池，该电池比Pt / C具有更好的可充电性。CoS _x @ PCN / rGO的增强的催化性能主要归因于高度多孔的形态和充分暴露的活性部位，这些部位对电催化反应有利。

更新日期：2017-09-14

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