Electrocatalysis ( IF 2.7 ) Pub Date : 2019-06-04 , DOI: 10.1007/s12678-019-00542-5 Shengliang Wei , Lihong Qian , Dongling Jia , Yuqing Miao
The 3D flower-like Ni0.6Zn0.4O microspheres were prepared by calcination treatment of Ni–Zn LDHs (layered double hydroxides) that were obtained through a hydrothermal method. The yielded Ni0.6Zn0.4O microspheres were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET). The results showed that the calcinated microspheres of Ni0.6Zn0.4O still well maintained the flower-like architecture of Ni–Zn LDHs. The surface area, total pore volume, and average pore diameter of the Ni0.6Zn0.4O microspheres were obtained with the values of 36.106 m2 g−1, 0.111 cm3 g−1, and 5.676 nm, respectively. As modified anode active materials, the Ni0.6Zn0.4O microspheres exhibited excellent electrocatalytic performance and fast electrochemical kinetics for methanol oxidation in strong alkaline electrolyte where the high surface area of flower-like Ni0.6Zn0.4O microspheres provides the high contact probability between catalysts and reactants. The presence of Zn also improves the electron transfer within catalysts inside. Also, the Ni0.6Zn0.4O modified electrode maintained good electrocatalytic performance during the term of 36,000 s.
中文翻译:
3D花样镍的合成
通过煅烧水热法制得的Ni-Zn LDHs(层状双氢氧化物),制备了3D花状Ni 0.6 Zn 0.4 O微球。通过扫描电子显微镜(SEM),能量色散X射线能谱(EDS),X射线衍射(XRD),X射线光电子能谱(XPS)和Brunauer-Emmett表征Ni 0.6 Zn 0.4 O产生的Ni 0.6 Zn 0.4 O微球–Teller(BET)。结果表明,Ni 0.6 Zn 0.4 O的煅烧微球仍然很好地保持了Ni-Zn LDH的花状结构。Ni 0.6 Zn 0.4的表面积,总孔体积和平均孔径用的36.106米值所得的O微球体2 克-1,0.111厘米3 克-1分别与5.676纳米。作为改性阳极活性材料,Ni 0.6 Zn 0.4 O微球在强碱性电解质中表现出优异的电催化性能和甲醇氧化的快速电化学动力学,其中花状Ni 0.6 Zn 0.4 O微球的高表面积提供了催化剂之间的高接触概率和反应物。Zn的存在还改善了内部催化剂内的电子转移。另外,Ni 0.6 Zn 0.4O修饰电极在36,000 s的时间内保持了良好的电催化性能。