A strongly coupled Ru–CrOx cluster–cluster heterostructure for efficient alkaline hydrogen electrocatalysis

IF 42.8 1区化学 Q1 CHEMISTRY, PHYSICAL Nature Catalysis Pub Date : 2024-03-11 DOI:10.1038/s41929-024-01126-3

Bingxing Zhang, Jianmei Wang, Guimei Liu, Catherine M. Weiss, Danqing Liu, Yaping Chen, Lixue Xia, Peng Zhou, Mingxia Gao, Yongfeng Liu, Jian Chen, Yushan Yan, Minhua Shao, Hongge Pan, Wenping Sun

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Abstract

Constructing well-defined heterostructure interfaces in catalysts is an efficient strategy to break the so-called scaling relationships and to accelerate the reactions involving multiple intermediates. Here a cluster–cluster heterostructure catalyst composed of crystalline ruthenium cluster and amorphous chromium oxide cluster is designed to realize high-performance alkaline hydrogen electrocatalysis. The strongly coupled cluster–cluster heterostructure interface induces a unique interfacial interpenetration effect, which simultaneously optimizes the adsorption of intermediates on each cluster. The resulting catalyst exhibits impressive catalytic activities for the hydrogen oxidation reaction (exchange current density of 2.8 A mg−1Ru) and the hydrogen evolution reaction (mass activity of 23.0 A mg−1Ru at the overpotential of 100 mV) in alkaline media. The hydroxide exchange membrane fuel cell delivers a mass activity of 22.4 A mg−1Ru at 0.65 V and outstanding durability with no voltage loss over 105 h operation at 500 mA cm−2. The present work demonstrates the superiority of cluster–cluster heterostructure interface towards the development of advanced catalysts. The synthesis of well-defined heterostructure interfaces can be leveraged to design advanced catalysts. Now a catalyst consisting of carbon-supported Janus particles with crystalline Ru and amorphous CrOx sides is shown to achieve high performance for both alkaline hydrogen oxidation and evolution reactions due to the synergy between both sides.

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用于高效碱性氢气电催化的强耦合 Ru-CrOx 簇簇异质结构

在催化剂中构建定义明确的异质结构界面是一种有效的策略，可以打破所谓的比例关系，加速涉及多种中间体的反应。本文设计了一种由结晶钌簇和无定形氧化铬簇组成的簇-簇异质结构催化剂，以实现高性能碱性氢气电催化。强耦合的簇-簇异质结构界面产生了独特的界面互穿效应，同时优化了每个簇上中间产物的吸附。由此产生的催化剂在碱性介质中的氢氧化反应（交换电流密度为 2.8 A mg-1Ru）和氢进化反应（过电位为 100 mV 时的质量活性为 23.0 A mg-1Ru）中表现出惊人的催化活性。氢氧化物交换膜燃料电池在 0.65 V 电压下的质量活度为 22.4 A mg-1Ru，在 500 mA cm-2 下运行 105 小时无电压损失，具有出色的耐用性。本研究成果证明了簇-簇异质结构界面在开发先进催化剂方面的优越性。

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来源期刊

Nature Catalysis Chemical Engineering-Bioengineering

CiteScore

52.10

自引率

1.10%

发文量

140

期刊介绍： Nature Catalysis serves as a platform for researchers across chemistry and related fields, focusing on homogeneous catalysis, heterogeneous catalysis, and biocatalysts, encompassing both fundamental and applied studies. With a particular emphasis on advancing sustainable industries and processes, the journal provides comprehensive coverage of catalysis research, appealing to scientists, engineers, and researchers in academia and industry. Maintaining the high standards of the Nature brand, Nature Catalysis boasts a dedicated team of professional editors, rigorous peer-review processes, and swift publication times, ensuring editorial independence and quality. The journal publishes work spanning heterogeneous catalysis, homogeneous catalysis, and biocatalysis, covering areas such as catalytic synthesis, mechanisms, characterization, computational studies, nanoparticle catalysis, electrocatalysis, photocatalysis, environmental catalysis, asymmetric catalysis, and various forms of organocatalysis.