CoP nanotubes formed by Kirkendall effect as efficient hydrogen evolution reaction electrocatalysts
CoP nanotubes formed by Kirkendall effect as efficient hydrogen evolution reaction electrocatalysts
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柯肯达尔效应形成的CoP纳米管作为高效析氢反应电催化剂
DOI：
10.1016/j.matlet.2017.04.154
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发表时间：
2017
影响因子：
3
通讯作者：
Zhuang Zhongbin
中科院分区：
文献类型：
--
作者：
Zhang Juntao;Liang Xin;Wang Xiaopeng;Zhuang Zhongbin
以Co（CO3）0.35Cl0.2（OH）1.10纳米棒为钴源和模板，通过Kirkendall效应合成了CoP纳米管。通过控制磷化过程中Co和P的摩尔比可以选择性地合成CoP纳米管和纳米棒，进一步证实了扩散控制的Kirkendall效应。得益于高的比表面积和改善的质量和电荷传输，CoP纳米管表现出比CoP纳米棒和纳米颗粒更高的析氢催化活性。CoP纳米管的析氢反应起始电位为55 mV，循环伏安法测试2000次后，其催化活性几乎没有变化。
CoP nanotubes are synthesized through a nanoscale Kirkendall effect using Co(CO3)0.35Cl0.2(OH)1.10nanorods as the cobalt source and template. CoP nanotubes and nanorods can be selectively synthesized by controlling the Co and P molar ratio in the phosphidation process, further confirming the diffusion controlled Kirkendall effect. Benefiting from the high surface area and improved mass and charge transportation, the CoP nanotubes exhibit higher hydrogen evolution catalytic activity than that of CoP nanorods and nanoparticles. The CoP nanotubes have a small onset potential of 55 mV for hydrogen evolution reaction, and high durability indicating by that the catalytic activity almost no change after 2000 cyclic voltammetry cycles.