Hollow NiMo-based nitride heterojunction with super-hydrophilic/aerophobic surface for efficient urea-assisted hydrogen production

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外文摘要：Hydrogen evolution reaction(HER)and urea oxidation reaction(UOR)are key reactions of the water-cycling associated catalytic process/device.The design of catalysts with a super-hydrophilic/aerophobic structure and optimized electron distribution holds great promise.Here,we have designed a three-dimensional(3D)hollow Ni/NiMoN hierarchical structure with arrayed-sheet surface based on a one-pot hydrothermal route for efficient urea-assisted HER based on a simple hydrothermal process.The Ni/NiMoN catalyst exhibits super-hydrophilic/aerophobic properties with a small droplet contact angle of 6.07° and an underwater bubble contact angle of 155.7°,thus facilitating an escape of bubbles from the electrodes.Density functional theory calculations and X-ray photoelectron spectroscopy results indi-cate the optimized electronic structure at the interface of Ni and NiMoN,which can promote the adsorp-tion/desorption of reactants and intermediates.The virtues combining with a large specific surface area endow Ni/NiMoN with efficient catalytic activity of low potentials of 25 mV for HER and 1.33 V for UOR at 10 mA cm-2.The coupled HER and UOR system demonstrates a low cell voltage of 1.42 V at 10 mA cm-2,which is approximately 209 mV lower than water electrolysis.

外文关键词：

Hydrogen evolutionTransition metal nitridesHollow heterojunctionsUrea electrooxidationSuper hydrophilic/aerophobic

作者：

Yuying Fan、Ying Gu、Dongxu Wang、Yanqing Jiao、Aiping Wu、Chungui Tian

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作者单位：

Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education of the People's Republic of China,Heilongjiang University,Harbin 150080,Heilongjiang,China

College of Chemistry,Chemical Engineering and Resource Utilization,Northeast Forestry University,Harbin 150040,Heilongjiang,China

基金：

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Heilongjiang ProvinceUniversity Nursing Program for Young Scholars with Creative Talents in Heilongjiang ProvinceBasic Research Fund of Heilongjiang University in Heilongjiang ProvinceHeilongjiang University Excellent Youth Foundation

项目编号：

2022YFA15030039196111122271081ZD2021B003UNPYSCT-20200042021-KYYWF-0039

出版年：

2024

DOI：

10.1016/j.jechem.2024.04.002

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.95(8)