Scholarlink

<p>Chitin carbon aerogel (CCA) was prepared from chitin in this work, which exhibits a highly porous fibrous network structure and a large specific surface area (SSA). Molybdenum disulfide (MoS<sub>2</sub>) nanosheets were synthesized on CCA (MoS<sub>2</sub>-CCA) by a hydrothermal method. The unique structure of CCA prevents the aggregation of MoS<sub>2</sub> and increases its SSA, thereby exposing more catalytic active sites. The catalytic performance of MoS<sub>2</sub>-CCA for the hydrogen evolution reaction (HER) was investigated, and it was found that its catalytic activity significantly outperforms that of MoS<sub>2</sub> supported on chitin carbon (MoS<sub>2</sub>-CC), commercial MoS<sub>2</sub>, and homemade MoS<sub>2</sub>, with a low onset overpotential (151&#xa0;mV) and good cycling stability. According to the analyses for structure, morphology, surface properties, and element valence states, besides the large SSA and porous structure of CCA, the rich oxygen and nitrogen-containing functional groups in CCA are also useful to the excellent catalytic activity, which increase the content of low-valence Mo and S. The synthesis strategy described herein is simple, and the biomass chitin used is a naturally occurring marine polymer that is inexpensive and non-polluting. This approach offers new avenues for designing high-efficiency HER electrocatalysts.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Molybdenum disulfide supported on chitin carbon aerogels as an efficient and stable hydrogen evolution electrocatalyst

  • 期刊论文

  • 发表日期：

    2025年1月23日

查看全文
  • Zhongya Jia,
  • Pengran Qi,
  • Junfeng Wang,
  • Yi Wang,
  • Yanli Ma,
  • Chunjian Xu,
  • Liangliang Tian,
  • Tao Qi

摘要

Chitin carbon aerogel (CCA) was prepared from chitin in this work, which exhibits a highly porous fibrous network structure and a large specific surface area (SSA). Molybdenum disulfide (MoS2) nanosheets were synthesized on CCA (MoS2-CCA) by a hydrothermal method. The unique structure of CCA prevents the aggregation of MoS2 and increases its SSA, thereby exposing more catalytic active sites. The catalytic performance of MoS2-CCA for the hydrogen evolution reaction (HER) was investigated, and it was found that its catalytic activity significantly outperforms that of MoS2 supported on chitin carbon (MoS2-CC), commercial MoS2, and homemade MoS2, with a low onset overpotential (151 mV) and good cycling stability. According to the analyses for structure, morphology, surface properties, and element valence states, besides the large SSA and porous structure of CCA, the rich oxygen and nitrogen-containing functional groups in CCA are also useful to the excellent catalytic activity, which increase the content of low-valence Mo and S. The synthesis strategy described herein is simple, and the biomass chitin used is a naturally occurring marine polymer that is inexpensive and non-polluting. This approach offers new avenues for designing high-efficiency HER electrocatalysts.