Synergistic Interface Engineering of RuO2/Co3O4 Heterostructures for Enhanced Overall Water Splitting in Acidic Media,Advanced Energy and Sustainability Research

当前位置： X-MOL 学术 › Adv. Energy Sustain. Res. › 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.)

Synergistic Interface Engineering of RuO2/Co3O4 Heterostructures for Enhanced Overall Water Splitting in Acidic Media
Advanced Energy and Sustainability Research ( IF 6.2 ) Pub Date : 2023-08-03 , DOI: 10.1002/aesr.202300057
Yiming Yang ₁ , Luqi Wang ₁ , Mingyue Ma ₁ , Feng Hu ₁ , Linlin Li ₁ , Ying Chuan Tan ₂ , Dan Kai _{2,

3} , Jianwei Ren ₄ , Shengjie Peng ₁

Affiliation

Designing nanocomposites with heterointerface as bifunctional electrocatalysts is a potential strategy to overcome the intrinsic activity limitation of electrocatalytic water splitting in acidic media, but it remains challenging. Herein, the highly efficient RuO₂/Co₃O₄ electrocatalyst with a uniform nanoflower structure is prepared by hydrothermal growth combined with interface engineering. Benefiting from the unique nanostructure, the migration of electrons and intermediates is optimized by the sufficient exposure of abundant micropores and defects. Moreover, the formation of strong electronic interaction at the RuO₂/Co₃O₄ heterointerfaces boosts the electrochemical active surface area and accelerates the reaction kinetics, which effectively improve the catalytic activity and stability of the catalyst. Based on enhanced intrinsic activity and electron transfer, the as-synthesized RuO₂/Co₃O₄ displays impressive hydrogen evolution reaction and oxygen evolution reaction activity, which respectively require low overpotentials of 240 and 100 mV to achieve a current density of 10 mA cm⁻² in 0.5 m H₂SO₄. As a bifunctional electrode, RuO₂/Co₃O₄ exhibits a low operating voltage of 1.58 V at 10 mA cm⁻² for overall electrochemical water splitting. This study demonstrates the importance of heterostructure engineering in providing an avenue to achieve acid-stable bifunctional electrocatalysts for energy conversion applications.

中文翻译：

RuO2/Co3O4 异质结构的协同界面工程增强酸性介质中的整体水分解

设计具有异质界面的纳米复合材料作为双功能电催化剂是克服酸性介质中电催化水分解的固有活性限制的潜在策略，但它仍然具有挑战性。本文通过水热生长结合界面工程制备了具有均匀纳米花结构的高效RuO ₂ /Co ₃ O _{4电催化剂。}受益于独特的纳米结构，电子和中间体的迁移通过充分暴露丰富的微孔和缺陷而得到优化。_{此外，在RuO 2} /Co ₃ O ₄处形成强电子相互作用异质界面增加了电化学活性表面积，加速了反应动力学，有效提高了催化剂的催化活性和稳定性。基于增强的本征活性和电子转移，所合成的RuO ₂ /Co ₃ O ₄显示出令人印象深刻的析氢反应和析氧反应活性，分别需要240和100 mV的低过电势才能实现10 mA cm的电流密度^-2在0.5m H 2 _SO 4_中。作为双功能电极，RuO ₂ /Co ₃ O ₄在 10 mA cm 时表现出 1.58 V 的低工作电压⁻²表示总体电化学水分解。这项研究证明了异质结构工程在为能源转换应用提供酸稳定双功能电催化剂方面的重要性。

更新日期：2023-08-03

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文