析氧
电催化剂
材料科学
分解水
双功能
化学工程
电解质
超亲水性
异质结
催化作用
电化学
纳米技术
电极
光电子学
光催化
化学
复合材料
润湿
物理化学
生物化学
工程类
作者
Fei Ye,Zhang Lin,Chengjie Lu,Zhuoheng Bao,Zeyi Wu,Qiang Liu,Zongping Shao,Linfeng Hu
标识
DOI:10.1002/smtd.202200459
摘要
Abstract Electrochemical overall water splitting using renewable energy input is highly desirable for large‐scale green hydrogen generation, but it is still challenged due to the lack of low‐cost, durable, and highly efficient electrocatalysts. Herein, 1D nanowires composed of numerous 2 nm Co 0.85 Se‐NiSe nanograin heterojunctions as efficient precious metal‐free bifunctional electrocatalyst are reported for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solution with the merits of high activity, durability, and low cost. The abundant microinterface among the ultrafine nanograins and the presence of lattice distortion around nanograin interface is found to create a superhydrophilic surface of the electrocatalyst, which significantly facilitate the fast diffusion of electrolytes and the release of the formed H 2 and O 2 from the catalyst surface. Furthermore, synergic effect between Co 0.85 Se and NiSe grain on adjusting the electronic structure is revealed, which enhances electron mobility for fast electron transport during the HER/OER process. Owing to these merits, the rationally designed Co 0.85 Se‐NiSe heterostructures display efficient overall water splitting behavior with a low voltage of 1.54 V at 10 mA cm −2 and remarkable long‐term durability for the investigated period of 50 h.
科研通智能强力驱动
Strongly Powered by AbleSci AI