Yang Dan, Cao Liyun, Feng Liangliang, Huang Jianfeng, Feng Yongqiang, Liu Qianqian, He Danyang, Wang Jun
School of Materials Science & Engineering, International S&T Cooperation Foundation of Shaanxi Province, Xi'an Key Laboratory of Green Manufacture of Ceramic Materials, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, P.R. China.
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, PR China.
Langmuir. 2021 Jan 12;37(1):357-365. doi: 10.1021/acs.langmuir.0c02943. Epub 2020 Dec 29.
The development of low-cost and high-efficient electrocatalysts toward hydrogen evolution reaction (HER) is highly desirable and challenging. Herein, the novel V-doped NiS/NiS heterostructure nanorod arrays grown on nickel foam (VNS/NF-WM) are synthesized a facile methanol-assisted hydrothermal method. We demonstrate that the morphology, phase composition, and crystallinity of VNS/NF are well modulated by tuning the ratios of water/methanol solvent. The optimized VNS/NF-WM-heterostructured nanorod (volume ratio of water/methanol is 3:1) exhibits superior HER electrocatalytic activity with low overpotentials of 85 and 218 mV to yield current density values of 10 and 100 mA cm, respectively, meanwhile sustaining an excellent stability with almost an unchanged current density of 10 mA cm for 60 h. Our work offers fresh insights into the rational design of highly active and stable earth-abundant-heterostructured electrocatalysts for the hydrogen fuel production.
开发低成本、高效的析氢反应（HER）电催化剂是非常必要且具有挑战性的。在此，通过简便的甲醇辅助水热法合成了生长在泡沫镍上的新型V掺杂NiS/NiS异质结构纳米棒阵列（VNS/NF-WM）。我们证明，通过调节水/甲醇溶剂的比例，可以很好地调控VNS/NF的形貌、相组成和结晶度。优化后的VNS/NF-WM异质结构纳米棒（水/甲醇体积比为3:1）表现出优异的HER电催化活性，在低过电位85和218 mV时分别产生10和100 mA cm的电流密度值，同时保持优异的稳定性，在60小时内10 mA cm的电流密度几乎不变。我们的工作为合理设计用于氢燃料生产的高活性、稳定的富含地球元素的异质结构电催化剂提供了新的见解。
