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Microwave-assisted fast synthesis of hierarchical NiCo2O4 nanoflower-like supported Ni(OH)2 nanoparticles with an enhanced electrocatalytic activity towards methanol oxidation
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2017-11-10 00:00:00 , DOI: 10.1039/c7qi00583k Bingrong Wang 1, 2, 3, 4, 5 , Yang Cao 1, 2, 3, 4 , Yong Chen 1, 2, 3, 4 , Ruzhi Wang 4, 5, 6, 7 , Xiaohong Wang 1, 2, 3, 4 , Xiaoyong Lai 4, 8, 9, 10 , Chunhui Xiao 11, 12, 13, 14, 15 , Jinchun Tu 1, 2, 3, 4 , Shujiang Ding 11, 12, 13, 14, 15
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2017-11-10 00:00:00 , DOI: 10.1039/c7qi00583k Bingrong Wang 1, 2, 3, 4, 5 , Yang Cao 1, 2, 3, 4 , Yong Chen 1, 2, 3, 4 , Ruzhi Wang 4, 5, 6, 7 , Xiaohong Wang 1, 2, 3, 4 , Xiaoyong Lai 4, 8, 9, 10 , Chunhui Xiao 11, 12, 13, 14, 15 , Jinchun Tu 1, 2, 3, 4 , Shujiang Ding 11, 12, 13, 14, 15
Affiliation
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NiCo2O4 nanoflowers were synthesized through a microwave-assisted hydrothermal method and used as a type support for Ni(OH)2 nanoparticles. In the three-dimensional NiCo2O4 nanoflowers, two-dimensional ultrathin nanosheets supported the Ni(OH)2 nanoparticles by homogeneous precipitation. The materials were characterized by field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. The electrochemical oxidation of methanol was probed through the NiCo2O4/Ni(OH)2 modification on a glassy carbon electrode in an alkaline medium by employing cyclic voltammetry (CV) and chronoamperometry (CA). The current density of the NiCo2O4/Ni(OH)2 electrode in 1 M KOH with 0.5 M methanol ascends to 92.3 A g−1 and restores to 94.6% of the primitive value through the replacement with a new solution after a long-term CV cycling (500 cycles). Therefore, the compounds further corroborate their excellent electrocatalytic activity and superb perennial stability for methanol oxidation. This study demonstrates that NiCo2O4/Ni(OH)2 is a peculiar material with an outstanding performance in direct methanol fuel cells.
中文翻译：
微波辅助快速合成具有增强的甲醇氧化电催化活性的分层NiCo 2 O 4纳米花状负载Ni（OH）2纳米颗粒
通过微波辅助水热法合成了NiCo 2 O 4纳米花，并用作Ni（OH）2纳米粒子的型载体。在三维NiCo 2 O 4纳米花中，二维超薄纳米片通过均匀沉淀支撑了Ni（OH）2纳米粒子。通过场发射扫描电子显微镜，透射电子显微镜，X射线光电子能谱和拉曼光谱对材料进行了表征。通过NiCo 2 O 4 / Ni（OH）2探测甲醇的电化学氧化通过使用循环伏安法（CV）和计时电流法（CA）对碱性介质中的玻璃碳电极进行修饰。在1 M KOH和0.5 M甲醇中，NiCo 2 O 4 / Ni（OH）2电极的电流密度上升至92.3 A g -1，并通过长期更换新溶液恢复至原始值的94.6％长期CV循环（500个循环）。因此，这些化合物进一步证实了其优异的电催化活性和对甲醇氧化的超常年稳定性。这项研究表明，NiCo 2 O 4 / Ni（OH）2是一种特殊的材料，在直接甲醇燃料电池中具有出色的性能。
更新日期：2017-11-24
中文翻译：
微波辅助快速合成具有增强的甲醇氧化电催化活性的分层NiCo 2 O 4纳米花状负载Ni（OH）2纳米颗粒
通过微波辅助水热法合成了NiCo 2 O 4纳米花，并用作Ni（OH）2纳米粒子的型载体。在三维NiCo 2 O 4纳米花中，二维超薄纳米片通过均匀沉淀支撑了Ni（OH）2纳米粒子。通过场发射扫描电子显微镜，透射电子显微镜，X射线光电子能谱和拉曼光谱对材料进行了表征。通过NiCo 2 O 4 / Ni（OH）2探测甲醇的电化学氧化通过使用循环伏安法（CV）和计时电流法（CA）对碱性介质中的玻璃碳电极进行修饰。在1 M KOH和0.5 M甲醇中，NiCo 2 O 4 / Ni（OH）2电极的电流密度上升至92.3 A g -1，并通过长期更换新溶液恢复至原始值的94.6％长期CV循环（500个循环）。因此，这些化合物进一步证实了其优异的电催化活性和对甲醇氧化的超常年稳定性。这项研究表明，NiCo 2 O 4 / Ni（OH）2是一种特殊的材料，在直接甲醇燃料电池中具有出色的性能。
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