过电位
异质结
多孔性
材料科学
分解水
密度泛函理论
电解水
离解(化学)
催化作用
化学物理
化学工程
纳米技术
电解
光电子学
化学
电解质
电化学
计算化学
光催化
复合材料
物理化学
电极
工程类
生物化学
作者
Lechen Diao,Pingping Wang,Feng Ge,Biao Zhang,Zhichao Miao,Li Xu,Jin Zhou
标识
DOI:10.1016/j.jcis.2024.02.056
摘要
Constructing in-plane heterojunctions with high interfacial density using two-dimensional materials represents a promising yet challenging avenue for enhancing the hydrogen evolution reaction (HER) in water electrolysis. In this work, we report that three-dimensional porous MoS2–ReS2 in-plane heterojunctions, fabricated via chemical vapor deposition, exhibit robust electrocatalytic activity for the water splitting reaction. The optimized MoS2–ReS2 in-plane heterojunction achieves superior HER performance across a wide pH range, requiring an overpotential of only 200 mV to reach a current density of 10 mA cm−2 in alkaline seawater. Thus, it outperforms standalone MoS2 and ReS2. Furthermore, the catalyst exhibits remarkable stability, enduring up to 200 h in alkaline seawater. Experimental results coupled with density functional theory calculations confirm that electron redistribution at the MoS2–ReS2 heterointerface is likely driven by disparities in in-plane work functions between the two phases. This leads to charge accumulation at the interface, thereby enhancing the adsorptive activity of S atoms toward H* intermediates and facilitating the dissociation of water molecules at the interface. This discovery offers valuable insights into the electrocatalytic mechanisms at the interface and provides a roadmap for designing high-performance, earth-abundant HER electrocatalysts suitable for practical applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI