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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

查看全文 作　　者：Yixing [1]Shen;Feng [2]Peng;Yonghai [1]Cao;Jianliang [2]Zuo;Hongjuan [1]Wang;Hao [1]Yu 高影响力作者 机构地区：[1]School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;[2]Guangzhou Key Laboratory for New Energy and Green Catalysis,School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,Guangdong,China高影响力机构 出　　处：《Journal of Energy Chemistry》索引2019年第28卷第7期,共10页高影响力期刊 基　　金：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
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