>>MXene with controlled surface termination groups for boosting photoelectrochemical water splitting
题名：MXene with controlled surface termination groups for boosting photoelectrochemical water splitting
来源：Journal of Materials Chemistry A
发表年代：2022年
作者：Zihao Wu, a Hui Zong,b Baihe Fua and Zhonghai Zhang*
Abstract: Interface engineering is a promising strategy to optimize the interfacial photoelectrochemical (PEC) water splitting system. However, previously, attention was paid to the engineering of the semiconductor/water interface and the other essential interface of the electrode/current collector was seriously undervalued. Herein, MXenes with controllable surface termination groups were synthesized using a molten salt etching method and used as electron transfer layer materials to modulate the interface between the semiconductor and the current collector. With BiVO4 as a model photo-responsive material, the combination of Br-MXene significantly contributed to a 33% increase in the photocurrent density compared with the pristine BiVO4-based photoelectrode. In addition, after attaching cobalt borate (CoBi) as a cocatalyst, the Br-MXene/BiVO4/CoBi photoelectrode achieved a high photocurrent density of 5.47 mA cm−2 at 1.23 V vs. RHE and photoconversion efficiency of 1.46%. The interface engineering strategy for efficient charge transfer is a promising and universal solution for the rational design of the photoelectrode and will inspire great research enthusiasm in the solar energy conversion fields.
