College of Environment and Chemical Engineering & State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin, PR China.
College of Environment and Chemical Engineering & State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin, PR China.
J Colloid Interface Sci. 2018 Aug 15;524:360-367. doi: 10.1016/j.jcis.2018.03.099. Epub 2018 Apr 10.
In this paper, platinum nanoparticles were deposited on a carbon carrier with the partly graphitized carbon and the highly dispersive carbon-coated nickel particles. An efficient electron transfer structure can be fabricated by controlling the contents of the deposited platinum. The high resolution transmission electron microscopy images of Pt/Ni@C sample prove the electron transfer channel from Pt (1 1 1) crystal planes to graphite (1 0 0) or Ni (1 1 1) crystal planes due to these linked together crystal planes. The Pt/Ni@C with low Pt contents cannot form the electron transfer structure and the Pt/Ni@C with high Pt contents show an obvious aggregation of Pt nanoparticles. The electrochemical tests of all the catalysts show that the Pt/Ni@C sample presents the highest catalytic activity, the strongest CO tolerance and the best catalytic stability. The high performance is attributed to the efficient electronic transport structure of the Pt/Ni@C sample and the synergistic effect between Pt and Ni nanoparticles. This paper provides a promising method for enhancing the conductivity of electrode material.
本文在部分石墨化碳和高分散性碳包覆镍粒子的碳载体上沉积了铂纳米粒子。通过控制沉积铂的含量，可以制备高效的电子传递结构。Pt/Ni@C 样品的高分辨率透射电子显微镜图像证明了由于这些相连的晶面，电子传递通道可以从 Pt（111）晶面转移到石墨（100）或 Ni（111）晶面。由于 Pt 含量低的 Pt/Ni@C 不能形成电子传递结构，而 Pt 含量高的 Pt/Ni@C 则表现出 Pt 纳米粒子的明显聚集。所有催化剂的电化学测试表明，Pt/Ni@C 样品具有最高的催化活性、最强的 CO 耐受性和最佳的催化稳定性。这种高性能归因于 Pt/Ni@C 样品高效的电子输运结构以及 Pt 和 Ni 纳米粒子之间的协同效应。本文为提高电极材料的导电性提供了一种有前景的方法。
