Nickel iron(hydroxyl)hydroxide with unique layered structure and controllable composition is widely regarded as typical oxygen evolution reaction(OER)catalysts.Recently,developing top-down approaches to realize the fa...Nickel iron(hydroxyl)hydroxide with unique layered structure and controllable composition is widely regarded as typical oxygen evolution reaction(OER)catalysts.Recently,developing top-down approaches to realize the facile preparation of transition metal hydroxide catalyst has received wide attention.Based on the natural microorganism corrosion behavior,this work demonstrates the external magnetic field-assisted microbial corrosion strategy to construct advanced transition metal hydroxide OER catalyst,and the prepared biofilm electrode presents superior OER performance in the existence of magnetic field,which needs an overpotential of 287 mV at 100 mA cm^(-2).Experimental and theoretical calculations show the applied magnetic field can accelerate sulfate reducing bacteria(SRB)corrosion and chemical corrosion.The additional magnetic field can promote SRB corrosion to produce FeS,which can facilitate the optimization of O intermediate desorption from the NiOOH catalyst during OER process,reducing the reaction energy barrier for O→OOH.The synergistic effect between the nickel-iron oxyhydroxides originated from the accelerated chemical corrosion and FeS produced from the accelerated SRB corrosion interprets the improved OER activity.This work explores the influence of magnetic field on the construction of advanced OER materials,which can provide an effective magnetic field-assisted corrosion engineering strategy,and promote the development of multidisciplinary fields of physics,biology,and emerging energy conversion technologies.展开更多
基金supported by the Innovation and Entrepreneurship Training Program Funded by Wuhan Institute of Technology(202210490007)The National Natural Science Foundation of China(22102125)the Natural Science Foundation of Hubei Province(2023AFB620)are also acknowledged.
文摘Nickel iron(hydroxyl)hydroxide with unique layered structure and controllable composition is widely regarded as typical oxygen evolution reaction(OER)catalysts.Recently,developing top-down approaches to realize the facile preparation of transition metal hydroxide catalyst has received wide attention.Based on the natural microorganism corrosion behavior,this work demonstrates the external magnetic field-assisted microbial corrosion strategy to construct advanced transition metal hydroxide OER catalyst,and the prepared biofilm electrode presents superior OER performance in the existence of magnetic field,which needs an overpotential of 287 mV at 100 mA cm^(-2).Experimental and theoretical calculations show the applied magnetic field can accelerate sulfate reducing bacteria(SRB)corrosion and chemical corrosion.The additional magnetic field can promote SRB corrosion to produce FeS,which can facilitate the optimization of O intermediate desorption from the NiOOH catalyst during OER process,reducing the reaction energy barrier for O→OOH.The synergistic effect between the nickel-iron oxyhydroxides originated from the accelerated chemical corrosion and FeS produced from the accelerated SRB corrosion interprets the improved OER activity.This work explores the influence of magnetic field on the construction of advanced OER materials,which can provide an effective magnetic field-assisted corrosion engineering strategy,and promote the development of multidisciplinary fields of physics,biology,and emerging energy conversion technologies.
基金Project supported by the National Natural Science Foundation of China (No. 10671214)the Chongqing Natural Science Foundation of China (No. 2005cc14)Shanghai Shuguang Genzong Project (No.04SGG05)
文摘这篇论文处理为一个非自治的不可思议地使不安的系统在快动力学从限制周期产生的次谐波解决方案和 invarianttori 的分叉。把地图，一系列发作转变和积分的理论基于 Poincare 歧管，为不变的岩山 i 的存在的条件被获得，并且次谐波答案的 saddle-nodebifurcations 被学习。
