摘要
通过水热法,在黑磷(BP)纳米片表面生长FeOOH纳米材料,制备出FeOOH/BP纳米复合材料。作为电化学析氧反应(OER)催化剂,该复合材料在20 mA·cm^(-2)时的过电位仅为191 mV,Tafel斜率为49.9 mV·dec^(-1);在循环1000圈后,过电位仅仅增加了3 mV,且循环过程中元素价态不变,表现出优秀的稳定性。纳米FeOOH负载于BP表面,客观上能隔断氧气对BP的氧化,保护BP的载流子传导性能。同时,生长的FeOOH颗粒尺度小,结晶性弱,这有利于丰富其活性位点,增大活性面积。
In the study,by hydrothermal method,FeOOH nano-materials were grown on the surface of black phosphorus(BP)nanosheets to prepare FeOOH/BP composite.As an oxygen evolution reaction(OER)electrocatalyst,its overpotential was only 191 mV at the current density of 20 mA·cm^(-2),with a Tafel slope of 49.9 mV·dec^(-1).After 1000 cycles,its overpotential only increased by 3 mV,showing the best stability.FeOOH was loaded on the BP surface,which can hinder BP oxidation and enhance its carrier conduction ability.And the loaded nano-FeOOH had a small scale and a weak crystalline nature,which is conducive to enriching their active site and increasing the active area.The synergy of this binary system is the main reason for the OER performance improvement.By comparison,it was found that the active area of FeOOH/BP reached 26.9 mF·cm^(-2),which was 2.3 times that of pure FeOOH(11.8 mF·cm^(-2))and 1.6 times that of pure BP nanosheets(16.8 mF·cm^(-2)).The excellent activity of this composite material is not only attributed to the morphology change of FeOOH,which significantly expands its effective active area but also benefits from the encapsulated BP,which has better dispersion and stronger conductivity.
作者
朱亚波
华承烨
谢婷婷
王广兰
冯培忠
ZHU Ya‑Bo;HUA Cheng‑Ye;XIE Ting‑Ting;WANG Guang‑Lan;FENG Pei‑Zhong(School of Materials Science and Physics,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2023年第6期1103-1112,共10页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.52020105011)资助。
关键词
黑磷
FEOOH
复合
析氧反应
电催化机理
black phosphorus
FeOOH
compound
oxygen evolution reaction
electrocatalytic mechanism
