Dong Yan, Liu Sheng, Deng Wenjing, Zhang Hao, Liu Guangyi, Wang Xiaolei
College of Chemistry and Chemical Engineering, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, PR China; Department of Chemical and Materials Engineering, University of Alberta, 9211-116 Street NW, Edmonton, Alberta T6G 1H9, Canada.
College of Chemistry and Chemical Engineering, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, PR China.
J Colloid Interface Sci. 2024 Jan;653(Pt B):1557-1565. doi: 10.1016/j.jcis.2023.09.189. Epub 2023 Oct 2.
Heteroatom doping is a possible way to regulate the catalytic capability of electrocatalysts for hydrogen evolution reaction (HER). This work focuses on the development of bimetallic Cobalt-Iron sulfide ultrathin nanosheets supported on the graphitic carbon nitride (g-CN) catalyst as efficient HER electrocatalysts (CoS/FeS/CN) with good stability at wide pH value. The ultrathin nanosheet exposes more active sites and enhances the catalyst activity. Electrochemical experiments demonstrate that adding g-CN and Fe to CoS increases its catalytic activity and stability. Furthermore, g-CN and Fe co-doped with CoS can modulate electronic structures on the interface. The CoS/FeS/CN exhibits outstanding HER performance, reaching a current density of 10 mA cm with overpotentials of only 76.5 mV in an acidic solution and 175.6 mV in an alkaline solution. It also demonstrates exceptional durability, superior to commercial platinum/carbon catalysts. This work introduces a promising approach for designing low-cost, high-performance HER electrocatalysts with a wide pH range.
杂原子掺杂是调节电催化剂析氢反应(HER)催化能力的一种可行方法。这项工作致力于开发负载在石墨相氮化碳(g-CN)上的双金属硫化钴 - 铁超薄纳米片作为高效析氢电催化剂(CoS/FeS/CN),该催化剂在较宽pH值范围内具有良好的稳定性。超薄纳米片暴露出更多活性位点,提高了催化剂活性。电化学实验表明,向CoS中添加g-CN和Fe可提高其催化活性和稳定性。此外,g-CN和Fe与CoS共掺杂可以调节界面处的电子结构。CoS/FeS/CN表现出出色的析氢性能,在酸性溶液中过电位仅为76.5 mV时达到10 mA cm的电流密度,在碱性溶液中过电位为175.6 mV时达到该电流密度。它还表现出优异的耐久性,优于商业铂/碳催化剂。这项工作为设计低成本、高性能且适用于宽pH范围的析氢电催化剂引入了一种有前景的方法。