光电阴极
催化作用
介电谱
四方晶系
材料科学
化学计量学
X射线光电子能谱
太阳能燃料
制氢
电化学
光谱学
氢
化学工程
化学
分析化学(期刊)
光催化
物理化学
电极
结晶学
晶体结构
有机化学
生物化学
物理
量子力学
色谱法
工程类
电子
作者
Miguel García‐Tecedor,Mariam Barawi,Alejandro García‐Eguizábal,Miguel Gomez‐Mendoza,Freddy E. Oropeza,Giulio Gorni,Anatoli Cibotaru,Marta Liras,Víctor A. de la Peña O’Shea
出处
期刊:Solar RRL
[Wiley]
日期:2024-02-09
卷期号:8 (7)
标识
DOI:10.1002/solr.202301069
摘要
CuBi 2 O 4 is one of the most studied potential candidates for photoelectrocatalytic solar fuel generation, from H 2 production, to CO 2 reduction, or even N 2 fixation. Hence, understanding its performance and catalytic behavior is key to use this material under real working conditions. Herein, Ag nanocorals are successfully deposited over CuBi 2 O 4 photocathodes for enhancing its performance as a promising candidate for photoelectrocatalytic reduction reactions. An in‐depth study of this novel structure through a combination of several materials’ characterization techniques, confirming the tetragonal structure and the stoichiometric proportion of the elemental components, is presented. In addition, the different charge transfer processes and catalytic mechanisms behind the performance of Ag‐decorated CuBi 2 O 4 photocathodes are unveiled through a combination of electrochemical impedance spectroscopy and transient absorption spectroscopy. The combination of these advanced spectroscopies reveals that Ag is acts as a true catalyst, enhancing the charge extraction and decreasing the charge accumulation and the recombination at the CuBi 2 O 4 surface, thus boosting the photocathode performance.
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