Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, The People's Republic of China.
J Am Chem Soc. 2012 Feb 15;134(6):2930-3. doi: 10.1021/ja211526y. Epub 2012 Jan 31.
The design of efficient, cheap, and abundant oxygen evolution reaction (OER) catalysts is crucial to the development of sustainable energy sources for powering fuel cells. We describe here a novel Mn(3)O(4)/CoSe(2) hybrid which could be a promising candidate for such electrocatalysts. Possibly due to the synergetic chemical coupling effects between Mn(3)O(4) and CoSe(2), the constructed hybrid displayed superior OER catalytic performance relative to its parent CoSe(2)/DETA nanobelts. Notably, such earth-abundant cobalt (Co)-based catalyst afforded a current density of 10 mA cm(-2) at a small overpotential of ~0.45 V and a small Tafel slope down to 49 mV/decade, comparable to the best performance of the well-investigated cobalt oxides. Moreover, this Mn(3)O(4)/CoSe(2) hybrid shows good stability in 0.1 M KOH electrolyte, which is highly required to a promising OER electrocatalyst.
高效、廉价、丰富的氧气析出反应（OER）催化剂的设计对于开发为燃料电池供电的可持续能源至关重要。我们在这里描述了一种新型的 Mn(3)O(4)/CoSe(2) 杂化物，它可能是这种电催化剂的有前途的候选物。可能由于 Mn(3)O(4)和 CoSe(2)之间的协同化学耦合效应，所构建的杂化物相对于其母体 CoSe(2)/DETA 纳米带表现出优异的 OER 催化性能。值得注意的是，这种丰富的钴（Co）基催化剂在小过电势~0.45 V 下提供了 10 mA cm(-2)的电流密度，小塔菲尔斜率低至 49 mV/decade，可与经过充分研究的钴氧化物的最佳性能相媲美。此外，这种 Mn(3)O(4)/CoSe(2) 杂化物在 0.1 M KOH 电解质中表现出良好的稳定性，这是一种有前途的 OER 电催化剂所必需的。
