非(少)贵金属介孔结构PEMFC电极催化剂
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- 英文论文题名：Mesostructured electrocatalysts as low-cost electrods for PEMFCs
- 论文作者：施剑林
- 英文论文作者：Jianlin Shi ; Shanghal Instiute of Ceramics ; Chinese Academy of Sciences ; Shanghal Key Lab.of Green Chemistry and chemical processes ; ECNU
- 年：2016
- 作者机构：中科院上海硅酸盐研究所;华东师范大学上海市绿色化学重点实验室;
- 论文关键词：介孔结构 ; 电催化剂 ; 氮掺杂碳 ; 介孔沸石
- 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-第三十三分会：绿色化学
- 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-第三十三分会 ; 绿色化学
- 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：422k
- 原文格式：D
- 会议级别：全国
摘要
质子交换膜燃料电池(PEMFCs)是一种将化学能转化为电能的新型能源,但目前机阳极和阴极催化剂均需要使用贵金属Pt。开发新型的低成本、高效、稳定的非贵金属PEMFC电极催化剂意义重大。采用模板复制法设计合成了高比表面积和结晶性能稳定的介孔结构的WO3材料,加入少量碳后该材料表现出良好的氢电化学催化氧化活性(图1)[1-3];而后,采用模板法合成出了高导电性耐酸碱腐蚀的介孔WC材料,以合成的介孔WC作为催化剂载体负载少量Pt纳米颗粒,获得了优于商用E-TEK的阴极氧还原电催化剂[4]。我们以WO3/C为氢氧化阳极催化剂以避免贵金属的CO中毒,以Pt/WC为氧还原阴极以防止碳的氧化腐蚀,以此组装成单电池其输出功率达到标准全Pt/C电极的PEMFC的70%[5]。探索了多种基于纳米碳材料的非贵金属氧还原电催化材料,如采用模板共浇注的热分解法制备含Fe Cx和Co Cx的N掺杂多壁碳纳米管或空心/介孔结构的氮掺杂碳立方体[6-7],材料表现出良好的氧还原电催化性能。以此为阴极催化剂组装的单电池,其功率输出为全E-TEK的38%-67%。探索基于介孔沸石的氧还原电极催化剂,获得了优良的氧还原电催化活性[8-9]。探讨了多组分催化剂组分之间的协同催化效应[10-11]。
Mesoporous WO_3 was synthesized and used as the carrier of 7.5%Pt NPs,showing comparable performance in H_2and methanol electro-oxidations,especially in preventing the Pt-poisoning.Mesostructured WO_3/C alone was found to be capable of electro-oxidizing hydrogen.Novel routes have been developed in synthesizing nanoscale N-doped carbon nanomaterials for use as cathodes in alkaline media,and further metal carbide NPs can be encapsulated in the N-doped carbons for the efficient ORR under acidic environments.By using mesostructured WO_3/C as the anode and mesostructured Pt/WC as the cathode,a single PEMFC has been constructured which demonstrated comparable overall power density output,and especially remarkably enhanced durability of operation.Most recently,mesostructured zeolite-based eletrocatalysts for both anode and cathodes of PEMFCs have been developed,which showed attractive electrochemical activities in methanol oxidation and oxygen reduction reactions.
Mesoporous WO_3 was synthesized and used as the carrier of 7.5%Pt NPs,showing comparable performance in H_2and methanol electro-oxidations,especially in preventing the Pt-poisoning.Mesostructured WO_3/C alone was found to be capable of electro-oxidizing hydrogen.Novel routes have been developed in synthesizing nanoscale N-doped carbon nanomaterials for use as cathodes in alkaline media,and further metal carbide NPs can be encapsulated in the N-doped carbons for the efficient ORR under acidic environments.By using mesostructured WO_3/C as the anode and mesostructured Pt/WC as the cathode,a single PEMFC has been constructured which demonstrated comparable overall power density output,and especially remarkably enhanced durability of operation.Most recently,mesostructured zeolite-based eletrocatalysts for both anode and cathodes of PEMFCs have been developed,which showed attractive electrochemical activities in methanol oxidation and oxygen reduction reactions.
引文
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10)Cui,X.;Shi,J*.;et al,Journal of Catalysis,2010,270,310-317;
11)Shi,J*,Chemical Reviews,2013,113,2139-2181.
2)Cui,X.;Shi,J*.;et al,Journal of Physical Chemistry C,2009,113,4134-4138;
3)Cui,X.;Shi,J*.;et al,Chem.Asian J.,2013,8,429 -436;
4)Cui,X.;Shi,J*.;et al,Chem Sus Chem,2014,7,135-145;
5)Chen,L.;Shi,J*.;et al,Chem Suschem,2015,8,623-627;
6)Wang,Y.;Shi,J*.;et al,Carbon,2014,68,232-239;
7)Cui,X.;Shi,J*.;et al,Energy&Environmental Science,2015,8,1261–1266,
8)Cui,X.;Shi,J*.;et al,Chem Sus Chem,2016,DOI:10 .1002/cssc.201600012;
9)Cui,X.;Shi,J*.;et al,ACS Catalysis,2014,4,2195-2206;
10)Cui,X.;Shi,J*.;et al,Journal of Catalysis,2010,270,310-317;
11)Shi,J*,Chemical Reviews,2013,113,2139-2181.
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