电催化剂的表面调控:缺陷化学
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- 英文论文题名：Surface Engineering of Electrocatalysts:Defect Chemistry
- 论文作者：王双印
- 英文论文作者：Shuangyin Wang ; Hunan University
- 年：2016
- 作者机构：湖南大学;
- 论文关键词：电催化 ; 缺陷化学 ; 氧还原 ; 氧析出 ; 表面调控
- 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-第三十分会：化学电源
- 语种：中文
- 分类号：O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十分会 ; 化学电源
- 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：2
- 文件大小：158k
- 原文格式：D
- 会议级别：全国
摘要
电催化过程主要发生在电催化剂的表面。因此,在催化剂设计中,针对电催化剂的表面设计与调控至关重要。那么,什么样的表面对电催化性能较为有利呢?早期的大量研究表明,电催化剂的表面缺陷,包括杂质缺陷、空位缺陷、填隙缺陷等,对电催化性能的提高具有正效应。因此,围绕缺陷化学,对电催化剂进行表面调控具有非常大的研究空间。本文将介绍近年来,我们课题组利用等离子体技术在催化剂表面调控方面取得的一些进展。氧析出(OER)与氧还原(ORR)是燃料电池、金属空气电池、电解水等系统的核心过程。目前最常用的ORR催化剂是铂,OER催化剂是氧化钌、氧化钇等。但这些贵金属催化剂价格昂贵,稳定性差。因此,研究者致力于开发非铂、非金属电催化剂,用于催化OER和ORR。本文选取的催化剂体系包括碳基非金属催化剂、钴基氧化物催化剂、层状材料。之所以选择等离子体技术去实现电催化剂表面结构的调控,是因为等离子体技术具有以下功能:1)表面清洁:在电催化剂合成中,表面会有部分有机杂质的残留。经等离子体处理后,表面有机杂质能被有效去除,可暴露更多的催化位点。2)产生氧空穴:等离子体状态下,存在大量的高能电子,可对过渡金属氧化物部分还原,产生氧空穴;氧空穴可以增大表面缺陷,提高电导率。3)刻蚀:等离子体有刻蚀功能。使用等离子体对催化剂进行表面刻蚀,可产生更多催化位点,提高比表面积。
Surface engineering on the electrocatalyts is one of the most popular strategies to tune the electrocatalytic activities.Here,we will present our recent progress on the electrocatalyst design by using the plasma technology.Oxygen evolution reaction(OER) and oxygen reduction reaction(ORR) are the key process for fuel cell,metal-air batteries,and water splitting.Currently,the typical electrocatalyst for ORR is Pt-based nanomaterials;and RuO_2 and IrO_2 are the typical electrocatalysts for OER.However,these noble metal-based electrocatalysts are of high cost and poor stability.Therefore,various strategies have been developed to enhance the electrocatalyst performance through the surface control.Recently,we have developed the plasma technology to tune the electrocatalytic performance of carbon-based metal-free electrocatalyst,Co-based compound and 2D layered nanomaterials for ORR,OER,and even hydrogen evolution reaction.
Surface engineering on the electrocatalyts is one of the most popular strategies to tune the electrocatalytic activities.Here,we will present our recent progress on the electrocatalyst design by using the plasma technology.Oxygen evolution reaction(OER) and oxygen reduction reaction(ORR) are the key process for fuel cell,metal-air batteries,and water splitting.Currently,the typical electrocatalyst for ORR is Pt-based nanomaterials;and RuO_2 and IrO_2 are the typical electrocatalysts for OER.However,these noble metal-based electrocatalysts are of high cost and poor stability.Therefore,various strategies have been developed to enhance the electrocatalyst performance through the surface control.Recently,we have developed the plasma technology to tune the electrocatalytic performance of carbon-based metal-free electrocatalyst,Co-based compound and 2D layered nanomaterials for ORR,OER,and even hydrogen evolution reaction.
引文
1.Lei Xu,Qianqian Jiang,Zhaohui Xiao,Xingyue Li,Jia Huo,Shuangyin Wang*,and Liming Dai,"Less is More:Plasma-Engraved Co_3O_4 Nanosheets with Oxygen Vacancies and High Surface Area for Oxygen Evolution Reaction",Angew.Chem.Int.Ed.2016,DOI:10.1002/anie.201600687
2.Zhaoling Ma,Shuo Dou,Anli Shen,Li Tao,Liming Dai,*and Shuangyin Wang*,"Sulfur Doped Graphene Derived from Cycled Lithium-Sulfur Batteries as Metal-free Electrocatalyst for Oxygen Reduction Reaction"Angew.Chem.Int.Ed.2015.54,1888-1892
3.Anli Shen,Yuqin Zou,Qiang Wang,Robert Dryfe,Xiaobing Huang,Liming Dai*,and Shuangyin Wang*,Oxygen Reduction Reaction in a Droplet on Graphite:Direct Evidence that the Edge Is More Active than the Basal Plane,Angew.Chem.Int.Ed.2014,53,10804
4.Shuo Dou,Li Tao,Jia Huo,Shuangyin Wang*and Liming Dai,"Etched and Doped Co9S8/Graphene Hybrid for Oxygen Electrocatalysis",Energy&Environmental Science,2016,DOI:10.1039/C6EE00054A
2.Zhaoling Ma,Shuo Dou,Anli Shen,Li Tao,Liming Dai,*and Shuangyin Wang*,"Sulfur Doped Graphene Derived from Cycled Lithium-Sulfur Batteries as Metal-free Electrocatalyst for Oxygen Reduction Reaction"Angew.Chem.Int.Ed.2015.54,1888-1892
3.Anli Shen,Yuqin Zou,Qiang Wang,Robert Dryfe,Xiaobing Huang,Liming Dai*,and Shuangyin Wang*,Oxygen Reduction Reaction in a Droplet on Graphite:Direct Evidence that the Edge Is More Active than the Basal Plane,Angew.Chem.Int.Ed.2014,53,10804
4.Shuo Dou,Li Tao,Jia Huo,Shuangyin Wang*and Liming Dai,"Etched and Doped Co9S8/Graphene Hybrid for Oxygen Electrocatalysis",Energy&Environmental Science,2016,DOI:10.1039/C6EE00054A