Dramatically Enhanced Visible-light-responsive H2 Evolution of Cd1-xZnxS via the Synergistic Effect of Ni2P and 1T/2H MoS2 Cocatalysts

• 作者: MA Xiao-Wei LIN Hai-Feng LI Yan-Yan WANG Lei PU Xi-Peng YI Xiu-Jie
• 来源期刊: 结构化学
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: materials structural cbemistry
• 页码范围: 7-22
• 页数: 16页
• 语种: 英文
• DOI: 10.14102/j.cnki.0254-5861.2011-2752

摘要

Photocatalytic hydrogen generation from water-splitting holds huge promise for resolving the current energy shortage and environmental issues.Nevertheless,it is still challenging so far to develop non-noble-metal photocatalysts which are efficient toward solar-powered hydrogen evolution reaction(HER).In this work,through an ultrasonic water-bath strategy combined with solvothermal and electrostatic assembly processes,we obtain homogeneous Cd1-xZnxS-Ni2P-MoS2 hybrid nano-spheres consisting of Cd1-xZnxS solid solutions decorated by Ni2P and 1T/2H MoS2 cocatalysts,which demonstrate excellent activity and stability for visible-light-responsive(λ＞420 nm)H2 production.Specifically,the Cd1-xZnxS-Ni2P-MoS2 nano-spheres with 2 wt％Ni2P and 0.2 wt％MoS2(CZ0.7S-2N-0.2M)exhibit the optimal HER activity of 55.77 mmol·g-1·h-1,about 47 and 32 times more than that of CZ0.7S and Pt-CZ0.7S,respectively.The outstanding HER performance of Cd1-xZnxS-Ni2P-MoS2 can be ascribed to the presence of abundant HER active sites in Ni2P nanoparticles and 1T/2H MoS2 nanosheets as well as the effective transfer and separation of charge carriers.Moreover,the coupling sequence of cocatalysts in Cd1-xZnxS-Ni2P-MoS2 is found to be critical in the regulation of charge transfer pathways and thus the resultant photocatalytic efficiency.The results displayed here could facilitate the engineering of high-performance photocatalysts employing multi-component cocatalysts for sustainable solar-to-fuel conversion.