Enhanced catalytic activity of electrodeposited Ni-Cu-P toward oxygen evolution reaction
Enhanced catalytic activity of electrodeposited Ni-Cu-P toward oxygen evolution reaction
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DOI：
10.1016/j.apcatb.2018.05.082
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发表时间：
2018-12-05
影响因子：
22.1
通讯作者：
Kim, Jae Jeong
中科院分区：
文献类型：
--
作者：
Kim, Byung Keun;Kim, Soo-Kil;Kim, Jae Jeong
析氧反应（OER）的缓慢动力学和用于OER的贵金属催化剂的高成本限制了水裂解的效率和成本效益。在这项研究中，我们介绍了电沉积镍铜磷（NiCuP）作为一种有效的OER电催化剂在碱性介质中。在NiP电催化剂中添加Cu显著提高了OER活性。电沉积条件的优化表明，与NiP相比，Nis（9）Cu（19）P（9）（以原子百分比计）表现出最好的活性，具有降低的Tafel斜率和电荷转移电阻。Ni 59 Cu 19 P9催化剂成功地经受了在10 mA/cm（2）下的OER操作长达30 h，同时保持了超过99%的法拉第效率。X射线光电子能谱（XPS）分析表明，Cu的加入增加了催化剂中活性氢氧化镍（NiOOH）物种的数量，这可能是催化剂活性提高的原因之一。
The slow kinetics of the oxygen evolution reaction (OER) and the high cost of the precious metal catalysts for the OER limit the efficiency and cost-effectiveness of water splitting. In this study, we introduce electrodeposited nickel-copper-phosphorous (NiCuP) as an efficient OER electrocatalyst in alkaline medium. The addition of Cu into the NiP electrocatalyst significantly enhanced the OER activity. Optimization of the electrodeposition conditions revealed that Nis(9)Cu(19)P(9) in terms of atomic percent exhibited the best activity with a reduced Tafel slope and charge transfer resistance for the OER, compared to NiP. The Ni59Cu19P9 catalyst successfully endured the OER operation at 10 mA/cm(2) for up to 30 h while maintaining a Faradaic efficiency of over 99%. The X-ray photoelectron spectroscopy showed that the amount of active Ni hydroxide (NiOOH) species increased with the addition of Cu, which likely contributed to the enhanced of catalytic activity.