Platinum (Pt) is a widely used co‐catalyst with excellent performance for photocatalytic hydrogen evolution. However, it is not suitable for industrial production because of its prohibitive cost. Currently, there are two means to overcome this challenge. One is to, find alternative cocatalysts for Pt. The other is to develop ultrasmall of noble metal clusters, which reduces the amount of noble metal loading required. This reduces the loading amount of noble metals and improves their atomic efficiency. In this work, we have integrated both these approaches to generate a non‐noble metal co‐catalyst nickel nitride (Ni₃N) and Au clusters (Au_c). The composite cocatalyst (Ni₃N−Au_c) thus obtained promotes photocatalytic hydrogen production of TiO₂. The (Ni₃N−Au_c−TiO₂) composite with an ultralow amount of Au_c (0.00025 wt%) shows photocatalytic hydrogen production rates that are even higher than that of Pt−TiO₂. The loading requirement of noble metal is reduced by 99.95 wt% compared to the optimal load of Pt; further indicating the cost efficiency possible through this method.

中文翻译：

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氮化镍上金团簇的超低负荷有效地促进了钛白粉对光催化氢的生产

铂（Pt）是一种广泛使用的助催化剂，具有出色的光催化制氢性能。但是，由于成本过高，因此不适合工业生产。当前，有两种方法可以克服这一挑战。一种是寻找铂的替代助催化剂。另一种是开发超小型的贵金属簇，从而减少所需的贵金属负载量。这减少了贵金属的负载量并提高了其原子效率。在这项工作中，我们结合了这两种方法来生成非贵金属助催化剂氮化镍（Ni ₃ N）和金簇（Au _c）。复合助催化剂（Ni ₃ N-Au _c如此获得的）促进了TiO _2的光催化制氢。具有极低的Au _c（0.00025 wt％）的（Ni ₃ N-Au _c -TiO ₂）复合材料显示出的光催化制氢速率甚至高于Pt-TiO ₂。与Pt的最佳负载相比，贵金属的负载需求降低了99.95 wt％；进一步表明通过此方法可能实现的成本效率。