CoPy/C催化剂应用碱性介质氧还原催化的电化学性能

引用本文: 徐莉, 乔锦丽, 丁蕾, 胡隆宇, 刘玲玲, 王海江. CoPy/C催化剂应用碱性介质氧还原催化的电化学性能[J]. 物理化学学报, 2011, 27(10): 2251-2254. doi: 10.3866/PKU.WHXB20111015 shu

Citation: XU Li, QIAO Jin-Li, DING Lei, HU Long-Yu, LIU Ling-Ling, WANG Hai-Jiang. Electrocatalytic Activity of CoPy/C Catalyst for the Oxygen Reduction Reaction in Alkaline Electrolyte[J]. Acta Physico-Chimica Sinica, 2011, 27(10): 2251-2254. doi: 10.3866/PKU.WHXB20111015 shu

CoPy/C催化剂应用碱性介质氧还原催化的电化学性能

徐莉 ^1, ,
乔锦丽 ^1, ,
丁蕾 ^1, ,
胡隆宇 ^1, ,
刘玲玲 ^1, ,
王海江 ^2,

基金项目:
国家自然科学基金(21173039) (21173039)

上海市浦江人才基金(08PJ14096) (08PJ14096)

上海市自然科学基金(09ZR1433300) (09ZR1433300)

浙江省重中之重学科开放基金(20110927) (20110927)

教育部归国留学人员基金(2009(1001)) (2009(1001))

上海市重点学科项目(B604)资助 (B604)

摘要: 利用碳黑(Vulcan XC-72R)中加入硫酸钴和吡啶(Py)作为催化剂前驱体, 经溶剂分散热处理构建了一类新型的高效氧还原CoPy/C复合催化剂. 并运用循环伏安法(CV)和旋转圆盘电极(RDE)技术研究了不同Co含量的CoPy/C催化剂在碱性介质中对氧还原的电催化活性. 结果表明: Co的存在对氧的催化剂活性位的形成有重要影响, 800 °C下所制备的10%Co30%Py/C (质量分数)复合催化剂表现出最佳的氧还原催化活性. 以其制备的气体扩散电极在3.0 mol·L^-1 KOH电解质溶液(O₂气氛)中0.014 V (相对于标准氢电极(RHE))即可产生明显的氧还原电流. 同40%Py/C 相比, 10%Co30%Py/C 催化氧还原的起峰电位正移了71 mV, 同时表现出明显的极限扩散电流. 在-0.16 V时电流密度达到最大值, 电流密度为1.0 mA·cm^-2, 半波电位在-0.07 V. 透射电镜分析表明所制备的碳黑载吡啶钴(10%Co30%Py/C)催化剂平均粒径为20 nm.

关键词:

English

Electrocatalytic Activity of CoPy/C Catalyst for the Oxygen Reduction Reaction in Alkaline Electrolyte

1.
1. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, P. R. China;
2. Institute for Fuel Cell Innovation, National Research Council Canada, Vancouver, B.C., V6T 1W5, Canada
Received Date: 11 July 2011
Available Online: 27 September 2011
Fund Project:
国家自然科学基金(21173039)

上海市浦江人才基金(08PJ14096)

上海市自然科学基金(09ZR1433300)

浙江省重中之重学科开放基金(20110927)

教育部归国留学人员基金(2009(1001))

上海市重点学科项目(B604)资助

Abstract: In this communication, we report a novel CoPy/C catalyst for the oxygen reduction reaction (ORR) in alkaline electrolyte using cobalt sulfate heptahydrate (CoSO₄·7H₂O) and pyridine (Py) as the Co and N precursors supported on Vulcan XC-72R, followed by heat treatment in an inert atmosphere. Electrochemical performances were evaluated using cyclic voltammograms (CVs) and rotating disk electrode (RDE) technique in terms of its ORR activity as a function of Co content in the catalyst synthesis. Results show that the presence of Co in the CoPy/C catalyst greatly affects the formation of ORR catalytic active sites and that the best performing catalyst is 10%Co%30Py/C, which was synthesized at 800°C. In 3.0 mol·L^-1 KOH, 10%Co30%Py/C (in O₂) produces an obvious ORR current with an on-set potential at 0.014 V. Compared with the 40% Py/C the on-set potential of the 10% Co30% Py/C for oxygen reduction shifted positively by 71 mV (versus RHE (reversible hydrogen electrode)) and a well-defined limiting current plateau was achieved. Therefore, a maximum current density of 1.0 mA·cm^-2 was obtained at -0.16 V with a half-wave potential of -0.07 V. Transmission electron microscopy (TEM) measurements show that the nanoparticles with a diameter of 20 nm are uniformly dispersed on Vulcan carbon (Vulcan XC-72R).

Key words:

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CoPy/C催化剂应用碱性介质氧还原催化的电化学性能

English

Electrocatalytic Activity of CoPy/C Catalyst for the Oxygen Reduction Reaction in Alkaline Electrolyte

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

CoPy/C催化剂应用碱性介质氧还原催化的电化学性能

English

Electrocatalytic Activity of CoPy/C Catalyst for the Oxygen Reduction Reaction in Alkaline Electrolyte

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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