Ni Foam-Supported Fe-Doped β-Ni(OH)2 Nanosheets Show Ultralow Overpotential for Oxygen Evolution Reaction,ACS Energy Letters

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Ni Foam-Supported Fe-Doped β-Ni(OH)2 Nanosheets Show Ultralow Overpotential for Oxygen Evolution Reaction
ACS Energy Letters ( IF 19.3 ) Pub Date : 2019-01-31 00:00:00 , DOI: 10.1021/acsenergylett.9b00047
Tianyi Kou ₁ , Shanwen Wang ₁ , Jesse L. Hauser ₁ , Mingpeng Chen ₁ , Scott R. J. Oliver ₁ , Yifan Ye ₂ , Jinghua Guo ₂ , Yat Li ₁

Affiliation

Oxygen evolution reaction (OER) involves multiple electron-transfer processes, resulting in a high activation barrier. Developing catalysts with low overpotential and high intrinsic activity toward OER is critical but challenging. Here we report a major advancement in decreasing the overpotential for oxygen evolution reaction. Ni foam-supported Fe-doped β-Ni(OH)₂ nanosheets achieve an overpotential of 219 mV at the geometric current density of 10 mA cm^–2. To our knowledge, this is the best value reported for Ni- or Fe hydroxide-based OER catalysts. In addition, the catalyst yields a current density of 6.25 mA cm^–2 at the overpotential of 300 mV when it is normalized to the electrochemical surface area of the catalyst. This intrinsic catalytic activity is also better than the values reported for most state-of-the-art OER catalysts at the same overpotential.

中文翻译：

Ni泡沫负载的Fe掺杂的β-Ni（OH）₂纳米片显示出超低的氧释放反应超电势

氧气析出反应（OER）涉及多个电子转移过程，从而导致很高的活化势垒。开发具有低过电势和对OER的高内在活性的催化剂至关重要，但具有挑战性。在这里，我们报告了在减少氧释放反应的超电势方面的重大进展。Ni泡沫负载的Fe掺杂的β-Ni（OH）₂纳米片在10 mA cm ^–2的几何电流密度下实现了219 mV的超电势。据我们所知，这是报道的基于镍或铁氢氧化物的OER催化剂的最佳价值。此外，催化剂产生的电流密度为6.25 mA cm ^–2当将其归一化到催化剂的电化学表面积时，在300 mV的超电势下。在相同的超电势下，这种固有的催化活性也优于大多数最新的OER催化剂所报道的值。

更新日期：2019-01-31

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