阴离子膜燃料电池g-C_3N_4/WO_3(H_2O)_(0.33)氧还原催化剂性能研究
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- 英文论文题名：Research of g-C_3N_4/WO_3(H_2O)_(0.33) catalysts for oxygen reduction reaction in anion exchange membrane fuel cell
- 论文作者：詹溯 ; 黄乃宝 ; 周锋
- 英文论文作者：Su Zhan ; Naibao Huang ; Feng Zhou ; 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：阴离子膜燃料电池 ; 非铂催化剂 ; 氧还原活性 ; 石墨相C3N4 ; WO3(H2O)0.33
- 英文论文关键词：Anion exchange membrane Fuel cell ; Metal-free catalysts ; Oxygen reduction reaction ; g-C3N4 ; WO3(H2O)0.33
- 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：O643.36;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：221k
- 原文格式：D
- 会议级别：全国
摘要
开发新型的非贵金属氧还原催化剂是阴离子膜燃料电池的研究热点之一。本文采用自组装法制备了g-C_3N_4/WO_3(H_2O)_(0.33)氧还原催化剂,利用X射线衍射(XRD)、场发射电子扫描显微镜(FE-SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)对其形貌和结构进行表征,并通过电化学方法评价了其催化氧还原性能。结果表明,利用g-C_3N_4杂化WO_3(H_2O)_(0.33)可提高其氧还原活性。第一性原理的计算结果证实,由于g-C_3N_4具有共轭π键结构,WO_3(H_2O)_(0.33)d层电子与π*电子形成的导电能带为电子的转移提供了有效通道,从而提升其催化剂活性。
The development of non-precious metal oxygen reduction catalysts which used in Anion exchange membrane fuel cell(AMFC) is the research hotspot of new energy technology. In this works, g-C_3N_4/WO_3(H_2O)_(0.33) were synthesized by self-assembly methods. The samples were evidently investigated by X-ray diffraction(XRD), field emission on scanning electron microscopy(FE-SEM), transmission electron microscopy(TEM) and X-ray photo-electron spectroscopy(XPS). The oxygen reduction reaction(ORR) activity of catalysts was tested by electrochemical methods. Result shows that the g-C_3N_4/WO_3(H_2O)_(0.33) presented a significantly enhanced ORR performance than WO_3(H_2O)_(0.33). The calculated results from the first principles revealed the mechanisms of g-C_3N_4 enhancing the ORR performance of WO_3(H_2O)_(0.33). g-C_3N_4 as a π-conjugated material can form d-π* bond with d orbital of WO_3(H_2O)_(0.33). This new bond can provide an effective way for electronic transmissions resulted in the enhancement of ORR performance.
The development of non-precious metal oxygen reduction catalysts which used in Anion exchange membrane fuel cell(AMFC) is the research hotspot of new energy technology. In this works, g-C_3N_4/WO_3(H_2O)_(0.33) were synthesized by self-assembly methods. The samples were evidently investigated by X-ray diffraction(XRD), field emission on scanning electron microscopy(FE-SEM), transmission electron microscopy(TEM) and X-ray photo-electron spectroscopy(XPS). The oxygen reduction reaction(ORR) activity of catalysts was tested by electrochemical methods. Result shows that the g-C_3N_4/WO_3(H_2O)_(0.33) presented a significantly enhanced ORR performance than WO_3(H_2O)_(0.33). The calculated results from the first principles revealed the mechanisms of g-C_3N_4 enhancing the ORR performance of WO_3(H_2O)_(0.33). g-C_3N_4 as a π-conjugated material can form d-π* bond with d orbital of WO_3(H_2O)_(0.33). This new bond can provide an effective way for electronic transmissions resulted in the enhancement of ORR performance.
引文
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[3]Parvez,K.,Yang,S.B.,Hermandez,Y.,et al.ACS Nano 2012,6(11):9541-9550.