Molybdenum disulfide (MoS₂), although it has shown great potential use in electrocatalysis, owns inert basal planes and the low electrical conductivity that limit its effective application. In this work, a MoS₂/carbon nanocage hybrid catalyst (MoS₂/Co–N–CN₂) with a higher density of exposed edge sites and conductivity was developed for efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The hybrid catalyst was successfully prepared via confined growth of MoS₂ in the porous carbon matrix derived from the metal organic framework ZIF-67. X-ray photoelectron spectroscopy revealed that the hybrid catalyst contained a significantly higher density of terminal sulfur edges than bulk MoS₂. The hybrid catalyst exhibited a high catalytic activity for HER and OER, with low onset overpotentials and small Tafel slopes. This enhanced catalytic performance is a direct result of the increased exposed sulfur edge sites, high surface area, and unique synergic effects between MoS₂ nanoplates and Co–N-doped porous carbon matrix. Therefore, the hybrid (MoS₂/Co–N–CN₂) catalyst serves as a highly promising bifunctional catalyst for HER and OER.

中文翻译：

---

嵌入Co-N掺杂碳纳米笼中的MoS ₂纳米板作为HER和OER的高效催化剂

二硫化钼（MoS ₂）尽管在电催化中显示出巨大的潜力，但它具有惰性的基面和低电导率，限制了其有效应用。在这项工作中，开发了具有更高暴露边缘位点密度和电导率的MoS ₂ /碳纳米笼杂化催化剂（MoS ₂ / Co-N-CN ₂），以进行有效的氢气释放反应（HER）和氧气释放反应（OER） 。通过在金属有机骨架ZIF-67衍生的多孔碳基质中MoS _2的有限生长，成功制备了杂化催化剂。X射线光电子能谱显示，杂化催化剂的末端硫边缘密度明显高于本体MoS。₂。杂化催化剂对HER和OER表现出高催化活性，具有低的起始过电势和小的Tafel斜率。这种增强的催化性能是暴露的硫边缘位点增加，高表面积以及MoS ₂纳米板与Co-N掺杂的多孔碳基质之间独特的协同效应的直接结果。因此，杂化（MoS ₂ / Co-N-CN ₂）催化剂可作为用于HER和OER的极有前景的双功能催化剂。