The Front Cover shows a strategy consisting of dual metal cocatalysts on nanoparticles of a semiconductor photocatalyst. In their Communication, Q. Liu et al. found that ohmic contact of Ag on ZnO favors electron transfer and charge separation, whereas Schottky junction between Pt or Au and ZnO prevents electron transfer, as shown by an ultrafast mid‐IR transient absorption spectroscopic study of interfacial charge transfer and separation efficiencies for ZnO nanoparticles and metal (Ag, Au and Pt) cocatalysts. The inner‐layer contacting metal of the dual metal cocatalyst effects the efficient charge transfer and acts as electron shuttle, and the outer‐layer metal plays the main role in the optimal chemical catalysis. More information can be found in the Communication by Q. Liu et al.

中文翻译：

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基于ZnO纳米粒子与贵金属助催化剂Ag / Au / Pt之间电荷转移和分离效率的金属助催化剂选择规则

封面显示了一种策略，该策略由半导体光催化剂的纳米颗粒上的双金属助催化剂组成。Q. Liu等人在他们的通讯中。发现Ag在ZnO上的欧姆接触有利于电子转移和电荷分离，而Pt或Au与ZnO之间的肖特基结阻止电子转移，如超快中红外瞬态吸收光谱研究对ZnO纳米颗粒的界面电荷转移和分离效率所显示的以及金属（Ag，Au和Pt）助催化剂。双重金属助催化剂的内层接触金属实现有效的电荷转移并充当电子穿梭，而外层金属在最佳化学催化中起主要作用。有关更多信息，请参见Q. Liu等人的来文。