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首页> 外文期刊>Catalysis science & technology >Highly conformal deposition of ultrathin cobalt acetate on a bismuth vanadate nanostructure for solar water splitting
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Highly conformal deposition of ultrathin cobalt acetate on a bismuth vanadate nanostructure for solar water splitting

机译：高保形沉积超薄钴乙酸在钒酸铋纳米结构太阳能水分裂

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摘要

In this work, the effect of photochemically modifying nanoporous bismuth vanadate in Co2+ solution in acetate buffer (abbreviated as Co-Ac) on water oxidation was thoroughly studied. Modification of photoanode surfaces with the electrocatalyst Co-Ac has yielded a similar to 450 mV cathodic shift in the onset potential and more than threefold higher photocurrent density at 1.23 V than that of pristine BiVO4. Structural and mechanistic studies indicate that Co-Ac effectively acts as a true catalyst on BiVO4 in that Co-Ac can boost the photoelectrochemical properties of the BiVO4 underlayer by mediating hole extraction across the photoexcited semiconductor-electrolyte interface. With Co-Ac as the catalyst, water oxidation becomes much more facile by overcoming the unproductive surface electron-hole recombination. This work considers the potential application of this simple surface modification approach for other candidate photoanodes.
机译：在这个工作中,光化学地的影响修改在Co2 +纳米多孔铋钒酸在醋酸缓冲溶液(缩写为Co-Ac)水氧化是彻底的研究。修改的光电阳极表面electrocatalyst Co-Ac已经产生了一个类似的450年爆发的潜力和mV阴极转移高出三倍光电流密度在1.23 V比原始BiVO4。和机械的研究表明Co-Ac有效地在BiVO4作为一个真正的催化剂Co-Ac可以提高光电化学通过中介的属性BiVO4下层洞在光激的提取semiconductor-electrolyte接口。氧化催化剂,水变得太多更容易克服的表面电子空穴复合。考虑了潜在的应用简单的表面改性方法候选人光电阳极。

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