Molybdenum doping effects for bismuth vanadate photocatalysts on electrochemical performances using the solution process

Yu Shiang Chen, Lu Yin Lin, Hung Yun Lin

研究成果: 雜誌貢獻文章同行評審

3 引文 斯高帕斯(Scopus)

摘要

Metal-doping is widely used to enhance charge generation and reduce carrier recombination of BiVO4 for catalyzing water oxidation. In this work, different Mo-doping levels are applied to synthesize Mo-doped BiVO4 (MBVO) on conductive glasses. Molybdenum plays multiple roles of dopant, structure-confined mediator, and sources for forming additional semiconductor. The MBVO with lower Mo-doping levels presents bi-layered structure with nanowire overlayer and nanorod underlayer, which can develop facile one-dimensional charge-transfer paths and efficient heterojunction. With preferable design of nanowire and nanorod layers, the high light absorption, small charge-transfer resistance and high carrier density are attained for MBVO with 1% Mo-doping, which shows the highest photocurrent density of 2.5 mA/cm2 at 1.23 VRHE, smallest onset potential of 0.22 VRHE and highest maximum photoconversion efficiency of 2.20%. This work carefully illustrates the function of molybdenum and firstly constructs the unique bi-layered structure for MBVO to display outstanding photoelectrochemical performance for catalyzing water oxidation.
原文英語
頁(從 - 到)667-674
頁數8
期刊International Journal of Hydrogen Energy
45
發行號1
DOIs
出版狀態已發佈 - 一月 1 2020

ASJC Scopus subject areas

  • 凝聚態物理學
  • 能源工程與電力技術
  • 燃料技術
  • 可再生能源、永續發展與環境

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