制备工艺对碱性溶液中石墨相氮化碳氧还原活性的影响
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- 英文论文题名：The effect of g-C_3N_4 manufacturing processing on its performance for ORR in alkaline solution
- 论文作者：孙天航 ; 孙银 ; 黄乃宝 ; 王晓晔 ; 詹溯 ; 王东超
- 英文论文作者：Tianhang Sun ; Yin Sun ; Naibao Huang ; Xiaoye Wang ; Su Zhan ; Dongchao Wang ; Transportation Equipments and Ocean Engineering College ; Dalian Maritime University
- 年：2016
- 作者机构：大连海事大学交通运输装备与海洋工程学院;
- 论文关键词：燃料电池 ; 非铂催化剂 ; 氧还原活性 ; 三聚氰胺 ; 氧化石墨烯
- 英文论文关键词：Fuel cell ; Metal-free catalysts ; Oxygen reduction reaction ; Melamine ; Graphitic carbon nitride(g-C3N4)
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十九分会：电化学材料
- 语种：中文
- 分类号：TQ426;TM911.4
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：114k
- 原文格式：D
- 会议级别：全国
摘要
开发新型非贵金属或非金属基氧还原催化剂对加快阴离子膜燃料电池的发展具有重要意义。本文以三聚氰胺为前驱体,采用热解法分别制备不同形貌的石墨型氮化碳,利用XRD、SEM、TEM等对其形貌和结构进行了分析,同时利用DFT进行了模拟计算并评价了其电化学性能。结果表明,常温热解工艺能制备出块状石墨型氮化碳(g-C_3N_4),而常温热解和水热结合能制备出花球状g-C_3N_4,二者对氧还原均表现出一定的催化活性。DFT计算结果证实,花球状g-C_3N_4的禁带宽度为0.995e V,其费米能级穿过价带位置,因而表现出ORR催化活性,且花球状C_3N_4的氧还原活性明显高于块状C_3N_4。
It is of great significance to develop Pt-free catalysts or metal-free oxygen reduction catalyst for fuel cell. In this paper, using melamine as precursor, graphitic carbon nitride(g-C_3N_4) having different morphology were prepared by pyrolysis. Its Morphology and structure were analyzed by XRD, SEM, TEM. Meanwhile, its catalytic activity for oxygen reduction reaction(ORR) was evaluated by electrochemical method. The results indicated that the bulk g-C_3N_4 was obtained by pyrolysis while globular flower g-C_3N_4 could be produced by combining pyrolysis with hydrothermal process. The obtained g-C_3N_4 all showed ORR catalytic activity. DFT calculation manifested the band gap of globular flower g-C_3N_4 is 0.995 eV and its fermi level could across the valence band. So, the ORR catalytic activity of globular flower g-C_3N_4 was higher than that of bulk g-C_3N_4.
It is of great significance to develop Pt-free catalysts or metal-free oxygen reduction catalyst for fuel cell. In this paper, using melamine as precursor, graphitic carbon nitride(g-C_3N_4) having different morphology were prepared by pyrolysis. Its Morphology and structure were analyzed by XRD, SEM, TEM. Meanwhile, its catalytic activity for oxygen reduction reaction(ORR) was evaluated by electrochemical method. The results indicated that the bulk g-C_3N_4 was obtained by pyrolysis while globular flower g-C_3N_4 could be produced by combining pyrolysis with hydrothermal process. The obtained g-C_3N_4 all showed ORR catalytic activity. DFT calculation manifested the band gap of globular flower g-C_3N_4 is 0.995 eV and its fermi level could across the valence band. So, the ORR catalytic activity of globular flower g-C_3N_4 was higher than that of bulk g-C_3N_4.
引文
[1]Huang,N.;Kirk,D W.;Thorpe,S J,et al.Energy Education Science and Technology,2014,32(6):5675-5682.
[2]Tamain,C.;Poynton,S D.;Slade,R C T,et al.Chem.Phys.2007,111:10421.
[3]丁炜,张雪,李莉,等.电化学,2014,20(5):426-438
[4]李文震,梁长海,辛勤.催化学报,2004,10:839-843.
[2]Tamain,C.;Poynton,S D.;Slade,R C T,et al.Chem.Phys.2007,111:10421.
[3]丁炜,张雪,李莉,等.电化学,2014,20(5):426-438
[4]李文震,梁长海,辛勤.催化学报,2004,10:839-843.