Hierarchical Urchin-like Cobalt-Doped CuO for Enhanced Electrocatalytic Oxygen Evolution Reaction,ACS Applied Energy Materials

当前位置： X-MOL 学术 › ACS Appl. Energy Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Hierarchical Urchin-like Cobalt-Doped CuO for Enhanced Electrocatalytic Oxygen Evolution Reaction
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-09-14 , DOI: 10.1021/acsaem.1c01632
Abhaya Kumar Mishra ₁ , Debabrata Pradhan ₁

Affiliation

Designing an efficient, low-cost, and earth-abundant electrocatalyst for water oxidation is the center of attraction in renewable energy technology, but it is still a grand challenge. Herein, we report a simple microwave-assisted solvothermal method to synthesize cobalt-doped CuO as a noble metal-free efficient electrocatalyst for oxygen evolution reaction (OER) in an alkaline medium. Optimal cobalt doping (5%) in CuO manifests an improved OER activity with an overpotential of 120 mV, which is ∼2.66 times lower than that obtained with pristine CuO to achieve a current density of 10 mA cm^–2, superior to the state-of-the-art OER catalysts. A Tafel slope of 118 mV dec^–1 with an electrochemical active surface area of 40 cm² and a charge transfer resistance of 2.58 Ω were achieved with 5% cobalt-doped CuO, which validate the role of metal doping and importance of doping in transition metal oxides to enhance the electrochemical OER activity.

中文翻译：

用于增强电催化析氧反应的多级海胆状钴掺杂 CuO

设计一种高效、低成本、地球储量丰富的水氧化电催化剂是可再生能源技术的热点，但仍然是一个巨大的挑战。在此，我们报道了一种简单的微波辅助溶剂热法合成钴掺杂的 CuO 作为一种不含贵金属的高效电催化剂，用于碱性介质中的析氧反应 (OER)。CuO 中的最佳钴掺杂 (5%) 表现出改善的 OER 活性，过电势为 120 mV，比使用原始 CuO 获得的电流密度低 2.66 倍，以获得 10 mA cm ^–2的电流密度，优于状态-最先进的 OER 催化剂。Tafel 斜率为 118 mV dec ^–1，电化学活性表面积为 40 cm ² 使用 5% 钴掺杂的 CuO 实现了 2.58 Ω 的电荷转移电阻，这验证了金属掺杂的作用以及在过渡金属氧化物中掺杂以提高电化学 OER 活性的重要性。

更新日期：2021-09-27

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11