能源化学(英文版)

能源化学(英文) ›› 2019, Vol. 28 ›› Issue (7): 33-42.DOI: 10.1016/j.jechem.2018.09.021

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Preparation of nitrogen and sulfur co-doped ultrathin graphitic carbon via annealing bagasse lignin as potential electrocatalyst towards oxygen reduction reaction in alkaline and acid media

Yixing Shena, Feng Pengb, Yonghai Caoa, Jianliang Zuob, Hongjuan Wanga, Hao Yua   

  1. a School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China;
    b Guangzhou Key Laboratory for New Energy and Green Catalysis, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, Guangdong, China
  • 收稿日期:2018-08-26 修回日期:2018-09-27 出版日期:2019-07-15 发布日期:2019-07-15
  • 通讯作者: Feng Peng
  • 基金资助:
    We acknowledge the financial support from the National Natural Science Foundation of China (Nos. 21476089, 21373091), the Provincial Science and Technology Project of Guangdong (No. 2014A030312007).

Preparation of nitrogen and sulfur co-doped ultrathin graphitic carbon via annealing bagasse lignin as potential electrocatalyst towards oxygen reduction reaction in alkaline and acid media

Yixing Shena, Feng Pengb, Yonghai Caoa, Jianliang Zuob, Hongjuan Wanga, Hao Yua   

  1. a School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China;
    b Guangzhou Key Laboratory for New Energy and Green Catalysis, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, Guangdong, China
  • Received:2018-08-26 Revised:2018-09-27 Online:2019-07-15 Published:2019-07-15
  • Contact: Feng Peng
  • Supported by:
    We acknowledge the financial support from the National Natural Science Foundation of China (Nos. 21476089, 21373091), the Provincial Science and Technology Project of Guangdong (No. 2014A030312007).

摘要： Renewable lignin used for synthesizing materials has been proven to be highly potential in specific electrochemistry. Here, we report a simple method to synthesize nitrogen and sulfur co-doped carbon nanosheets by using bagasse lignin, denoted as lignin-derived carbon (LC). By adjusting the ratio of nitrogen source and annealing temperature, we obtained the ultrathin graphitic lignin carbon (LC-4-1000) with abundant wrinkles with high surface area of 1208 m2g-1 and large pore volume of 1.40 cm3g-1. In alkaline medium, LC-4-1000 has more positive half-wave potential and nearly current density compared to commercial Pt/C for oxygen reduction reaction (ORR). More importantly, LC-4-1000 also exhibits comparable activity and superior stability for ORR in acid medium due to its high graphitic N ratio and a direct four electron pathway for ORR. This study develops a cost-effective and highly efficient method to prepare biocarbon catalyst for ORR in fuel cells.

关键词: Electrocatalyst, Biocarbon, Lignin, Nitrogen and sulfur co-doped carbon, Oxygen reduction reaction

Abstract: Renewable lignin used for synthesizing materials has been proven to be highly potential in specific electrochemistry. Here, we report a simple method to synthesize nitrogen and sulfur co-doped carbon nanosheets by using bagasse lignin, denoted as lignin-derived carbon (LC). By adjusting the ratio of nitrogen source and annealing temperature, we obtained the ultrathin graphitic lignin carbon (LC-4-1000) with abundant wrinkles with high surface area of 1208 m2g-1 and large pore volume of 1.40 cm3g-1. In alkaline medium, LC-4-1000 has more positive half-wave potential and nearly current density compared to commercial Pt/C for oxygen reduction reaction (ORR). More importantly, LC-4-1000 also exhibits comparable activity and superior stability for ORR in acid medium due to its high graphitic N ratio and a direct four electron pathway for ORR. This study develops a cost-effective and highly efficient method to prepare biocarbon catalyst for ORR in fuel cells.

Key words: Electrocatalyst, Biocarbon, Lignin, Nitrogen and sulfur co-doped carbon, Oxygen reduction reaction