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Received:May 20, 2019
Received:May 20, 2019
中文摘要: 镍基催化剂作为碱性溶液中高催化活性和稳定的非贵金属催化剂，广泛用于小分子电催化氧化领域研究。以磷掺杂碳纳米管为载体，将负载镍/氧化镍核壳的纳米粒子用于甲醇小分子的电氧化，获得了良好的稳定性及催化活性。在仅有3%的低负载量时，在氧化峰电位，其质量活性为6 800 mA/mg，未掺杂碳纳米管载体上负载的纳米粒子活性仅为2 070 mA/mg。而且，与CNTs相比，PCNTs为载体时甲醇电氧化的起始电位及氧化电位均有一定程度的负移。该高催化性能归因于镍/氧化镍核壳纳米粒子的小粒径，以及磷掺杂碳纳米管载体与金属之间的相互作用。
Abstract:Ni-based catalysts,as active and stable non-noble metal catalysts in alkaline solutions are widely used in the research of small molecule electrocatalytic oxidation.The Ni/NiO nanoparticles were anchoring on phosphorous doped carbon nanotubes for electrocatalytic methanol oxidation.Efficient catalytic activity and stability in electrocatalytic reaction were obtained.The NiO/Ni-PCNTs with a low nickel loading shows an mass activity of 6 800 mA mg-1 at the peak potential of 3%,while that of its undoped counterpart is 2 070 mA mg-1.In addition both the onset and oxidation peak potentials of NiO/Ni-PCNTs for methanol oxidation shift negatively in comparison to CNTs.We proposed that the small particle size of Ni/NiO nanoparticles,and electronic effect arising from the interactions between PCNTs and Ni/NiO contribute to the improved electrocatalytic performances.
keywords: phosphorous doping carbon nanotubes electrocatalytic methanol oxidation supports catalysts interaction
文章编号：20201005 中图分类号：O646 文献标志码：
基金项目:国家自然科学基金青年基金（51802190）。
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