本文利用一种简单的化学配体控制氧化方法,将NiFeCoAlOOH纳米颗粒负载在钛掺杂的纳米多孔赤铁矿光阳极上(Ti-PH),并将其用于光电催化水分解、由于NiFeCoAlOOH能够帮助提升Ti-PH光阳极的析氧反应动力学并且降低表面电荷转移电阻,修饰后...本文利用一种简单的化学配体控制氧化方法,将NiFeCoAlOOH纳米颗粒负载在钛掺杂的纳米多孔赤铁矿光阳极上(Ti-PH),并将其用于光电催化水分解、由于NiFeCoAlOOH能够帮助提升Ti-PH光阳极的析氧反应动力学并且降低表面电荷转移电阻,修饰后的光阳极相对于1.23 V us.RHE时具有2.46 mA/cm^(2)的光电流密度,并且与Ti-PH或空白赤铁矿光阳极相比具有更好的稳定性.此外,对比钛掺杂的纳米多孔赤铁矿光阳极,NiFeCoAlOOH修饰后的光电流的起始电位负移了~60 mV.这项工作为设计高性能、稳定、廉价的光电化学电池提供了一种具有潜力的催化剂修饰方法.展开更多
近年来,基于BiVO_(4)光阳极的光电催化分解水技术引起人们的关注.我们通过水热-氨化法制备出Ni_(3)N纳米颗粒,首次将其作为助催化剂修饰到BiVO_(4)光阳极上光电催化分解水.实验表明, Ni_(3)N纳米颗粒成功负载到BiVO_(4)光阳极表面并可...近年来,基于BiVO_(4)光阳极的光电催化分解水技术引起人们的关注.我们通过水热-氨化法制备出Ni_(3)N纳米颗粒,首次将其作为助催化剂修饰到BiVO_(4)光阳极上光电催化分解水.实验表明, Ni_(3)N纳米颗粒成功负载到BiVO_(4)光阳极表面并可有效抑制表面电荷复合以及提高光电催化分解水性能.在1.23 V v. RHE处光电流密度可达3.23mA/cm^(2).此外, Ni_(3)N/BiVO_(4)光阳极的最大值ABPE值达0.88%,并呈现出良好的稳定性.展开更多
Oxygen evolution reaction is one of the key processes in the promising renewable energy technique of electrocatalytic water splitting.Developing high ecient oxygen evolution reaction(OER)catalysts requires determinati...Oxygen evolution reaction is one of the key processes in the promising renewable energy technique of electrocatalytic water splitting.Developing high ecient oxygen evolution reaction(OER)catalysts requires determination of the optimal values of the descriptor parameters.Using spinel CoFe2O4 as the model catalyst,this work demonstrates that irradiation with pulsed UV laser can control the quantity of surface oxygen vacancy and thus modify the OER activity,in a volcano-shape evolution trend.This strategy sheds light on quantita-tively investigation of the relationship between surface cation valence,anion vacancy,and physicochemical properties of transition-metal-based compounds.展开更多
基金supported by the National Key Research and Development Program of China(No.2017YFA0402800)the National Natural Science Foundation of China(No.51772285 and No.21971229)the Fundamental Research Funds for the Central Universities,and CAS Belt and Road Scholarship for International Students.
文摘本文利用一种简单的化学配体控制氧化方法,将NiFeCoAlOOH纳米颗粒负载在钛掺杂的纳米多孔赤铁矿光阳极上(Ti-PH),并将其用于光电催化水分解、由于NiFeCoAlOOH能够帮助提升Ti-PH光阳极的析氧反应动力学并且降低表面电荷转移电阻,修饰后的光阳极相对于1.23 V us.RHE时具有2.46 mA/cm^(2)的光电流密度,并且与Ti-PH或空白赤铁矿光阳极相比具有更好的稳定性.此外,对比钛掺杂的纳米多孔赤铁矿光阳极,NiFeCoAlOOH修饰后的光电流的起始电位负移了~60 mV.这项工作为设计高性能、稳定、廉价的光电化学电池提供了一种具有潜力的催化剂修饰方法.
文摘近年来,基于BiVO_(4)光阳极的光电催化分解水技术引起人们的关注.我们通过水热-氨化法制备出Ni_(3)N纳米颗粒,首次将其作为助催化剂修饰到BiVO_(4)光阳极上光电催化分解水.实验表明, Ni_(3)N纳米颗粒成功负载到BiVO_(4)光阳极表面并可有效抑制表面电荷复合以及提高光电催化分解水性能.在1.23 V v. RHE处光电流密度可达3.23mA/cm^(2).此外, Ni_(3)N/BiVO_(4)光阳极的最大值ABPE值达0.88%,并呈现出良好的稳定性.
基金supported by the National Key Basic Research Program of China (2016YFA0300102)the National Natural Science Foundation of China (No.11675179,No.U1532142,and No.11434009)the Fundamental Research Funds for the Central Universities
文摘Oxygen evolution reaction is one of the key processes in the promising renewable energy technique of electrocatalytic water splitting.Developing high ecient oxygen evolution reaction(OER)catalysts requires determination of the optimal values of the descriptor parameters.Using spinel CoFe2O4 as the model catalyst,this work demonstrates that irradiation with pulsed UV laser can control the quantity of surface oxygen vacancy and thus modify the OER activity,in a volcano-shape evolution trend.This strategy sheds light on quantita-tively investigation of the relationship between surface cation valence,anion vacancy,and physicochemical properties of transition-metal-based compounds.
基金Project supported by the National Key Research and Development Program of China(No.2017YFA0402800)the National Natural Science Foundation of China(Nos.21971229,51925206,U1932214)the Zhejiang Provincial Natural Science Foundation(No.LR19B010001)。
