Affiliation:
1. Key Laboratory for Colloid and Interface Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shandong University Jinan Shandong 250100 China
2. Suzhou Research Institute Shandong University Suzhou Jiangsu 215123 China
3. School of Materials Science and Engineering University of Science and Technology Beijing 30 Xueyuan Road Beijing 100083 China
4. Zhongguancun Institute of Human Settlements Engineering and Materials Beijing 100083 China
5. Shunde Innovation School University of Science and Technology Beijing Foshan 528399 China
Abstract
AbstractConstructing and manipulating hetero‐interfaces for the electrocatalytic hydrogen evolution reaction (HER) is highly desirable, but still poses a significant challenge. Herein, this work adopts a facile way to controllably synthesize three different hetero‐interfaces by anchoring ultrafine Ru nanoparticles on various MoOx nanotube (NT) substrates, including MoO2, MoO2/MoO3, and MoO3. Remarkably, MoO2@Ru NT displays excellent HER activity with tiny overpotentials of 89 and 131 mV delivering large current densities of 500 and 1000 mA cm−2, respectively, far surpassing two other hetero‐interfaces, commercial Ru/C, Pt/C catalysts. Impressively, this hetero‐interface even achieves an exceptionally large current density of 4000 mA cm−2 at an overpotential of 322 mV. Moreover, MoO2@Ru NT presents exceptional stability for at least 100 h at 1000 mA cm−2 with negligible degradation. Both experimental observations and theoretical calculations suggest that moderate electron transfer from Ru to MoO2 enhances the water dissociation kinetics, and optimizes the hydrogen adsorption/desorption, thus simultaneously speeding up the HER kinetics. Furthermore, an anion exchange membrane electrolyzer assembled by obtained MoO2@Ru NT as a cathode electrocatalyst, shows attractive activity and excellent durability, with a low voltage of 1.78 V at 1000 mA cm−2, and a prolonged time period for 200 h at 1000 mA cm−2.
Funder
Natural Science Foundation of Jiangsu Province
National Natural Science Foundation of China
Natural Science Foundation of Shandong Province
Fundamental Research Funds for the Central Universities
Subject
General Materials Science,Renewable Energy, Sustainability and the Environment
Cited by
7 articles.
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