期刊
NANO RESEARCH
卷 12, 期 3, 页码 575-580出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-018-2256-9
关键词
bismuth vanadate; photoelectrochemistry; solar water splitting; oxygen evolution
类别
资金
- Fundamental Research Funds for the Central Universities [xjj2016039]
Oxygen evolving catalyst (OEC) is a critical determinant for the efficiency of photoelectrochemical (PEC) water splitting. Here we report an approach to depositing a novel manganese borate (Mn-Bi) OER catalyst on BiVO4 nanocone photoanode by photodeposition in sodium borate buffer solution containing Mn(II) ions. Due to the spontaneous photo-electric-field-enhancement effect at the vertically oriented BiVO4 nanocone structure, spherical Mn-Bi nanoparticle was selectively photodeposited at the apex of BiVO4 nanocone. Significant improvement of photocurrent was observed for the obtained hierarchical Mn-Bi/BiVO4 photoanode which could be ascribed to enhanced hole injection efficiency, especially in low bias region. It was observed that the injection efficiency of Mn-Bi/BiVO4 is 98% which gave a photocurrent of 0.94 mA/cm(2) at 1.5 V vs. RHE.
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