Constructing Adjustable Heterointerface for Enhancing Acidic Oxygen Evolution Performances of RuO2@CoMnO3 Nanosheets Electrocatalysts

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Materials Letters Pub Date : 2024-06-13 DOI:10.1021/acsmaterialslett.4c00778

Jinyang Zhang, Hongye Qin, Xuejie Cao, Wenqi Jia, Rongpeng Ma, Xiaojie Chen, Wei Xia, Guangliang Lin and Lifang Jiao*,

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Abstract

Developing ruthenium-based (Ru-based) catalysts with a heterointerface is essential to improving the acidic oxygen evolution reaction (OER) performance. In this study, we first prepared RuO₂/CoMnO₃ nanosheet catalysts by solid-phase pyrolysis, featuring a low Ru content, and presented a high OER mass activity (1742.9 A g_Ru^–1 at 1.53 V) and superior stability (500 h at 10 mA cm^–2) in 0.5 M H₂SO₄ under a three-electrode system. Notably, Co and Mn sites facilitated electron transfer to Ru sites through bridge oxygen to avoid Ru overoxidation, as proved by the increase in the average surface oxidation state (SOS) of Mn and Co and the insignificant change in the average SOS of Ru after the chronopotentiometry test. Moreover, the heterointerface can reduce the OER energy barrier and restrain the participation of lattice oxygen. This work indicates the significant potential of employing well-supported catalysts with an adjustable heterointerface to prominently improve the activity and stability of Ru-based catalysts.

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构建可调节的异质界面以提高 RuO2@CoMnO3 纳米片电催化剂的酸性氧进化性能

开发具有异质界面的钌基 (Ru) 催化剂对于提高酸性氧进化反应 (OER) 性能至关重要。在本研究中，我们首先通过固相热解法制备了 RuO2/CoMnO3 纳米片催化剂，该催化剂的 Ru 含量较低，在三电极体系下，在 0.5 M H2SO4 中具有较高的 OER 质量活性（1.53 V 时为 1742.9 A gRu-1）和卓越的稳定性（10 mA cm-2 时为 500 h）。值得注意的是，Mn 和 Co 的平均表面氧化态（SOS）增加，而 Ru 的平均表面氧化态（SOS）在计时电位测试后变化不大，这证明 Co 和 Mn 的位点通过桥氧促进了电子转移到 Ru 位点，从而避免了 Ru 的过氧化。此外，异质界面还能降低 OER 能垒，抑制晶格氧的参与。这项工作表明，采用具有可调异质界面的良好支撑催化剂具有极大的潜力，可显著提高 Ru 基催化剂的活性和稳定性。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.