Electrocatalysis of the hydrogen oxidation reaction on carbon-supported bimetallic NiCu particles prepared by an improved wet chemical synthesis
Electrocatalysis of the hydrogen oxidation reaction on carbon-supported bimetallic NiCu particles prepared by an improved wet chemical synthesis
复制标题
DOI：
10.1016/j.jelechem.2016.11.031
复制
发表时间：
2016-12-15
影响因子：
4.5
通讯作者：
Savinova, Elena R.
中科院分区：
文献类型：
--
作者：
Cherstiouk, Olga V.;Simonov, Pavel A.;Savinova, Elena R.
采用等体积浸渍法和冷冻干燥法制备了不同Ni：Cu原子比的碳载Ni 1-xCux/C催化剂。用X射线粉末衍射、透射电镜和循环伏安法对催化剂进行了表征。采用线性扫描伏安法研究了Ni 1-xCux/C催化剂在碱性介质中对氢氧化反应的电催化活性。结果发现，在低分数的Cu的添加显着提高在氢氧化反应中的Ni的电催化活性，而增加的Cu分数超过5%的结果，其衰减。将所观察到的NiCu催化剂的行为与文献数据进行了比较，并初步解释了Cu对Ni上氢吸附能的影响。(C)© 2016 Elsevier B. V.版权所有。
Carbon supported Ni1-xCux/C catalysts with different Ni:Cu atomic ratios comprising ca 30 nm particles uniformly distributed over the surface of carbon support were prepared by the incipient wetness impregnation followed by freeze-drying. The catalysts have been characterized by X-ray powder diffraction, transmission electron microscopy and cyclic voltammetry. The electrocatalytic activities of Ni1-xCux/C catalysts in the hydrogen oxidation reaction in alkaline medium were examined with linear sweep voltammetry. It was found that addition of Cu at low fractions significantly improves the electrocatalytic activity of Ni in the hydrogen oxidation reaction, while increasing the Cu fraction above 5% results in its attenuation. The observed behavior of NiCu catalysts is compared to the literature data and tentatively explained by the influence of Cu on the energy of hydrogen adsorption on Ni. (C) 2016 Elsevier B.V. All rights reserved.