Liu Sida, Li Hongkun, Zhong Jing, Xu Kai, Wu Ge, Liu Chang, Zhou Binbin, Yan Yang, Li Lanxi, Cha Wenhao, Chang Keke, Li Yang Yang, Lu Jian
Centre for Advanced Structural Materials, City University of Hong Kong Shenzhen Research Institute, Greater Bay Joint Division, Shenyang National Laboratory for Materials Science, Shenzhen 518057, China.
Hong Kong Branch of National Precious Metals Material Engineering Research Center, City University of Hong Kong, Hong Kong SAR, China.
Sci Adv. 2022 Nov 4;8(44):eadd6421. doi: 10.1126/sciadv.add6421.
Platinum-based catalysts are widely used in hydrogen evolution reactions; however, their applications are restricted because of the cost-efficiency trade-off. Here, we present a thermodynamics-based design strategy for synthesizing an AlMnRu (atomic %) metal catalyst via combinatorial magnetron co-sputtering. The new electrocatalyst is composed of ~2 nanometers of medium-entropy nanocrystals surrounded by ~2 nanometers of amorphous regions. The catalyst exhibits exceptional performance, similar to that of single-atom catalysts and better than that of nanocluster-based catalysts. We use aluminum rather than a noble metal as the principal element of the catalyst and ruthenium, which is cheaper than platinum, as the noble metal component. The design strategy provides an efficient route for the development of electrocatalysts for use in large-scale hydrogen production. Moreover, the superior hydrogen reaction evolution created by the synergistic effect of the nano-dual-phase structure is expected to guide the development of high-performance catalysts in other alloy systems.
铂基催化剂广泛应用于析氢反应；然而，由于成本效益的权衡，它们的应用受到限制。在此，我们提出一种基于热力学的设计策略，通过组合磁控共溅射合成一种AlMnRu（原子百分比）金属催化剂。这种新型电催化剂由约2纳米的中熵纳米晶体组成，周围环绕着约2纳米的非晶区域。该催化剂表现出卓越的性能，类似于单原子催化剂，且优于基于纳米团簇的催化剂。我们使用铝而非贵金属作为催化剂的主要元素，并使用比铂便宜的钌作为贵金属成分。该设计策略为开发用于大规模制氢的电催化剂提供了一条有效途径。此外，由纳米双相结构的协同效应产生的优异析氢性能有望指导其他合金体系中高性能催化剂的开发。
