Loading of molecular catalyst on the surface of semiconductors is an attractive way to boost the water oxidation activity. As active sites, molecular water oxidation cocatalysts show increasing attraction and application possibility. In order to compare the advantages between molecular catalysts with non-noble and noble metals, the loading of the Fe(salen) and Ru(salen) as cocatalyst precursors on the surface of Ti−Fe₂O₃ was investigated Quasi-Fe(salen) and Ru(salen) improved the photocurrent density by 1.5 and 1.7 times compared to that of the original Ti−Fe₂O₃ photoanode, respectively. The quasi-Fe(salen) could improve the conductivity and reaction kinetics on the photoanode surface. By contrast, the notable advancements could be attributed to more reaction sites for quasi-Ru(salen) as cocatalysts. Thus, non-noble quasi-Fe(salen) is a promising cocatalyst to replace the noble metal salen, and further optimization can be expected with regard to the precise control of reaction sites.

中文翻译：

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准分子助催化剂对掺钛赤铁矿光阳极的改性：非贵金属与贵金属改善机理的比较

将分子催化剂负载在半导体表面上是提高水氧化活性的一种有吸引力的方法。作为活性位点，分子水氧化助催化剂显示出越来越高的吸引力和应用可能性。为了分子催化剂之间的优点与非贵金属和贵金属比较，所述Fe的负载量（沙仑）和Ru（沙仑）作为钛-铁的表面上的助催化剂的前体₂ ö ₃进行了研究准的Fe（沙仑）和Ru（salen）相较于原始Ti-Fe ₂ O ₃，光电流密度提高了1.5倍和1.7倍分别为光电阳极。准Fe（salen）可以提高光阳极表面的电导率和反应动力学。相比之下，显着的进步可以归因于准Ru（salen）作为助催化剂的更多反应位点。因此，非贵金属准Fe（salen）是替代贵金属salen的有前途的助催化剂，并且在精确控制反应位点方面可以期待进一步的优化。