| 电化学置换法制备高Pt利用率的类核壳型Ni-Pt电催化剂(英文) |
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| 引用本文： | 孙盾,何建平,周建华,王涛,狄志勇,丁晓春. 电化学置换法制备高Pt利用率的类核壳型Ni-Pt电催化剂(英文)[J]. 物理化学学报, 2010, 26(5): 1219-1224. DOI: 10.3866/PKU.WHXB20100507 |
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| 作者姓名： | 孙盾 何建平 周建华 王涛 狄志勇 丁晓春 |
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| 作者单位： | College of Material Science and Technology, Nanjing University of Aeronautics and Astronautic, Nanjing 210016, P. R. China |
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| 基金项目： | The project was supported by the National Natural Science Foundation，Aeronautical Science Foundation of China(2007ZF52061).国家自然科学基金，航空科学基金 |
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| 摘 要： | 采用电化学置换法,在VulcanXC-72表面制备得到了活性高和分散性好的纳米Ptshell-Nicore电催化剂.该方法先以NaH2PO2为还原剂,化学沉积得到Ni核,Pt在Ni核表面通过原位置换形成Ni-Pt类核壳型结构.通过透射电镜(TEM)、X射线衍射(XRD)、紫外-可见光光谱(UV-Vis)和循环伏安(CV)测试证明了Pt壳层完全包覆在Ni核的表面.电化学氢吸/脱附测试结果显示,Ptshell-Nicore/XC-72的电化学活性面积为Pt/C(JM)的1.2倍,而其理论Pt担载量只为Pt/C(JM)的40%.这表明,核壳型Ni-Pt纳米粒子可以显著提高Pt的催化活性和利用率.
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| 关 键 词： | 电催化剂 Ptshell-Nicore/XC-72 类核壳结构 Pt利用率 |
| 收稿时间： | 2009-09-06 |
| 修稿时间： | 2010-03-23 |
Galvanic Replacement Strategy for a Core-Shell Like Ni-Pt Electrocatalyst with High Pt Utilization |
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| SUN Dun HE Jian-Ping ZHOU Jian-Hua WANG Tao DI Zhi-Yong DING Xiao-Chun. Galvanic Replacement Strategy for a Core-Shell Like Ni-Pt Electrocatalyst with High Pt Utilization[J]. Acta Physico-Chimica Sinica, 2010, 26(5): 1219-1224. DOI: 10.3866/PKU.WHXB20100507 |
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| Authors: | SUN Dun HE Jian-Ping ZHOU Jian-Hua WANG Tao DI Zhi-Yong DING Xiao-Chun |
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| Affiliation: | College of Material Science and Technology, Nanjing University of Aeronautics and Astronautic, Nanjing 210016, P. R. China |
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| Abstract: | A highly active and well-dispersed nanoscale Ptshell-Nicore/XC-72 electrocatalyst was synthesized.The Nicore was reduced by NaH2PO2,followed by an in situ galvanic replacement to yield a Ni-Pt core-shell like structure.Complete coverage of the Ni core by a Pt shell was confirmed by various techniques including transmission electron microscopy(TEM),X-ray diffraction(XRD),UV-visible(UV-Vis) spectrophotometry,and cyclic voltammetry(CV).A probe reaction of hydrogen electrooxidation showed that the electrocataly... |
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| Keywords: | Ptshell-Nicore/XC-72 Electrocatalyst Ptshell-Nicore/XC-72 Core-shell like structure Pt utilization |
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