Photocatalytic water oxidation by a pyrochlore oxide upon irradiation with visible light: rhodium substitution into yttrium titanate.
Photocatalytic water oxidation by a pyrochlore oxide upon irradiation with visible light: rhodium substitution into yttrium titanate.
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DOI：
10.1002/anie.201407179
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发表时间：
2014-12
影响因子：
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通讯作者：
B. Kiss;C. Didier;Timothy Johnson;T. Manning;M. Dyer;Alexander J. Cowan;J. Claridge;J. R. Darwent;M. Rosseinsky
中科院分区：
文献类型：
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作者：
B. Kiss;C. Didier;Timothy Johnson;T. Manning;M. Dyer;Alexander J. Cowan;J. Claridge;J. R. Darwent;M. Rosseinsky
报道了一种稳定的可见光驱动水氧化催化剂（λ≥450 nm）。通过监测单位胞参数随铑含量变化的维加德定律，证明了铑取代成焦绿石y2ti2o7，最大掺杂量为3%。取代使固溶体具有可见光活性。Y2 Ti1.94 Rh0.06 O7的总体析氧速率与WO3相当，但具有更好的光收集和表面积归一化周转率，这使得Y2 Ti1.94 Rh0.06 O7成为z方案水分解体系的优秀候选材料。
A stable visible-light-driven photocatalyst (λ≥450 nm) for water oxidation is reported. Rhodium substitution into the pyrochlore Y2 Ti2 O7 is demonstrated by monitoring Vegard's law evolution of the unit-cell parameters with changing rhodium content, to a maximum content of 3 % dopant. Substitution renders the solid solutions visible-light active. The overall rate of oxygen evolution is comparable to WO3 but with superior light-harvesting and surface-area-normalized turnover rates, making Y2 Ti1.94 Rh0.06 O7 an excellent candidate for use in a Z-scheme water-splitting system.