A bismuth vanadate(BiVO4)photoanode with a cocatalyst consisting of NiFe layered double‐hydroxide(NiFe‐LDH)nanoparticles was fabricated for photoelectrochemical(PEC)water splitting.NiFe‐LDH nanoparticles,which can ...A bismuth vanadate(BiVO4)photoanode with a cocatalyst consisting of NiFe layered double‐hydroxide(NiFe‐LDH)nanoparticles was fabricated for photoelectrochemical(PEC)water splitting.NiFe‐LDH nanoparticles,which can improve light‐absorption capacities and facilitate efficient hole transfer to the surface,were deposited on the surface of the BiVO4 photoanode by a hydrothermal method.All the samples were characterized using X‐ray diffraction,scanning electron microscopy,and diffuse‐reflectance spectroscopy.Linear sweep voltammetry and current‐time plots were used to investigate the PEC activity.The photocurrent response of NiFe‐LDH/BiVO4 at 1.23 V vs the reversible hydrogen electrode was higher than those of Ni(OH)2/BiVO4,Fe(OH)2/BiVO4 and pure BiVO4 electrodes under visible‐light illumination.NiFe‐LDH/BiVO4 also gave a superior PEC hydrogen evolution performance.Furthermore,the stability of the NiFe‐LDH/BiVO4 photoanode was excellent compared with that of the bare BiVO4 photoanode,and offers a novel method for solar‐assisted water splitting.展开更多
对于二聚合物类(dimer)的双粒子的扩散限制聚集生长(Diffusion-Limited-Aggregation,DLA)现象,我们研究了在不同的边界范围释放双粒子所聚集的粒子簇(cluster),发现对于由相同类粒子即无极性粒子构成的双粒子生成的粒子簇的分形(fractal...对于二聚合物类(dimer)的双粒子的扩散限制聚集生长(Diffusion-Limited-Aggregation,DLA)现象,我们研究了在不同的边界范围释放双粒子所聚集的粒子簇(cluster),发现对于由相同类粒子即无极性粒子构成的双粒子生成的粒子簇的分形(fractal)维数随释放边界离粒子簇中央距离的减少而增大,而且粒子簇形貌更加紧致(compact),但对于由不同类粒子即有极性粒子构成的双粒子簇,其分形维数变化无规律,有极性双粒子的 DLA 是一种新的模拟模型。展开更多
基金supported by the National Natural Science Foundation of China(21663027,51262028,21261021)the Science and Technology Support Project of Gansu Province(1504GKCA027)+2 种基金the Program for the Young Innovative Talents of Longyuanthe Program for Innovative Research Team(NWNULKQN-15-2)the Undergraduate Academic Innovative Research Team of Northwest Normal University~~
文摘A bismuth vanadate(BiVO4)photoanode with a cocatalyst consisting of NiFe layered double‐hydroxide(NiFe‐LDH)nanoparticles was fabricated for photoelectrochemical(PEC)water splitting.NiFe‐LDH nanoparticles,which can improve light‐absorption capacities and facilitate efficient hole transfer to the surface,were deposited on the surface of the BiVO4 photoanode by a hydrothermal method.All the samples were characterized using X‐ray diffraction,scanning electron microscopy,and diffuse‐reflectance spectroscopy.Linear sweep voltammetry and current‐time plots were used to investigate the PEC activity.The photocurrent response of NiFe‐LDH/BiVO4 at 1.23 V vs the reversible hydrogen electrode was higher than those of Ni(OH)2/BiVO4,Fe(OH)2/BiVO4 and pure BiVO4 electrodes under visible‐light illumination.NiFe‐LDH/BiVO4 also gave a superior PEC hydrogen evolution performance.Furthermore,the stability of the NiFe‐LDH/BiVO4 photoanode was excellent compared with that of the bare BiVO4 photoanode,and offers a novel method for solar‐assisted water splitting.
文摘对于二聚合物类(dimer)的双粒子的扩散限制聚集生长(Diffusion-Limited-Aggregation,DLA)现象,我们研究了在不同的边界范围释放双粒子所聚集的粒子簇(cluster),发现对于由相同类粒子即无极性粒子构成的双粒子生成的粒子簇的分形(fractal)维数随释放边界离粒子簇中央距离的减少而增大,而且粒子簇形貌更加紧致(compact),但对于由不同类粒子即有极性粒子构成的双粒子簇,其分形维数变化无规律,有极性双粒子的 DLA 是一种新的模拟模型。
