摘要
以二氰二胺、硒粉和钨酸钠为前驱体,采用一锅法成功制备出Se掺杂WO_(3)·0.5H_(2)O/g-C_(3)N_(4)(Se/WCN)催化剂。并采用X射线衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)和X射线光电子能谱(XPS)对样品的物相结构、形貌及化学组成进行表征。与原始的WO_(3)和g-C_(3)N_(4)相比,Se/WCN催化剂的起始电位降到了-0.75 V(vs RHE),电流密度高达70 mA·cm^(-2),表现出更高的电催化活性。而光照后,Se/WCN的催化性能进一步提升,起始电位从-0.75 V(vs RHE)降至-0.65 V(vs RHE),电荷转移电阻由371.4Ω减小到310.0Ω。
A simple one-pot method was used to prepare the Se doped WO_(3)·0.5H_(2)O/g-C_(3)N_(4)(Se/WCN) electrocatalyst.The crystal phase structure,morphology,and chemical composition were characterized by X-ray diffraction(XRD),field emission scanning electron microscopy(FE-SEM),and X-ray photoelectron spectroscopy(XPS).The electrochemical performance was measured by linear sweep voltammetry,electrochemical impedance,and chronoamperometry in 1 mol·L-1H_(2)SO_(4)solution.The results showed that the prepared Se/WCN-1 had the best electrochemical performance when the mass ratio of Se doping to g-C_(3)N_(4)was 1∶1,and the overpotential was-0.75 V(vs RHE) at the current density of 70 mA·cm^(-2).After exposure to light,the initial potential of Se/WCN-1 decreased from -0.75 to -0.65 V(vs RHE),and charge-transfer resistance decreased from 371.4 to 310.0Ω.
作者
崔慧娜
董文斌
廖港丽
赵震
姚垚
CUI Hui-Na;DONG Wen-Bin;LIAO Gang-Li;ZHAO Zhen;YAO Yao(College of Chemistry and Chemical Engineering,Ningxia Normal University,Guyuan,Ningxia 756000,China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2023年第1期109-116,共8页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.22265025,12164037)
宁夏自然科学基金(No.2021AAC05013,2022AAC03336)
六盘山资源工程技术研究中心(No.HGZD22-14)
无机化学重点学科资助。
