氮掺杂褶皱石墨烯的自下而上制备及其氧气还原反应研究(英文)

被引：15

作者：

张国新 ^{[1
]}

金秀彦 ^{[1
]}

李昊远 ^{[1
]}

王琳 ^{[1
]}

胡策军 ^{[1
,2
]}

孙晓明 ^{[1
,2
]}

机构：

[1] State Key Laboratory of Chemical Resource Engineering

[2] College of Energy, Beijing University of Chemical Technology

来源：

ScienceChinaMaterials | 2016年 / 59卷 / 05期

关键词：

dehalogenation; crumpled graphene; diffussion; oxygen reduction reaction;

D O I：

暂无

中图分类号：

O613.71 [碳C]; O632.2 [不饱和烃卤素衍生物的聚合物];

学科分类号：

070301 ; 081704 ; 070305 ; 080501 ;

摘要：

本文首次报道了自下而上液相合成褶皱石墨烯,所使用的制备方法为:卤化高分子聚偏二氟乙烯（PVDF）在崎岖的强碱CaC2表面进行脱官能团碳化.因PVDF的官能团脱除需要CaC2的存在,导致二者的界面反应深度受限,故经由CaC2脱官能团并模板得到的褶皱薄层碳材料的厚度非常小,继续高温焙烧可将薄层碳转化为寡层（3～6层）石墨烯,通过BET测试分析所得到的褶皱石墨烯（CrG）在900°C下焙烧具有高达324.8 m2 g-1的比表面积.经过N掺杂修饰的CrG应用于电化学催化氧气还原反应（ORR）,发现其具有和商用铂碳催化剂（20 wt.%Pt/C）相当的起峰电位和半波电位,且具有更为优秀的促进载荷物质在其孔道内的输运行为.更为有趣的是:通过增加催化剂的负载量,N掺杂的CrG表现出极限电流的稳定增加,而Pt催化剂无此行为,这种特性可潜在提供给整装器件更高密度的比能量.

引用

页码：337 / 347

页数：11

共 19 条

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