Solar-Driven Interfacial Evaporation Accelerated Electrocatalytic Water Splitting on 2D Perovskite Oxide/MXene Heterostructure

Yi Lu; Hao Zhang; Yida WangXiaorong ZhuWeiping XiaoHaolan XuGaoran LiYafei LiDeqi FanHaibo ZengZupeng ChenXiaofei Yang

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Solar-Driven Interfacial Evaporation Accelerated Electrocatalytic Water Splitting on 2D Perovskite Oxide/MXene Heterostructure

机译：Solar-Driven Interfacial Evaporation Accelerated Electrocatalytic Water Splitting on 2D Perovskite Oxide/MXene Heterostructure

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The rational design of economic and high-performance electrocatalytic water-splitting systems is of great significance for energy and environmental sustainability. Developing a sustainable energy conversion-assisted electrocatalytic process provides a promising novel approach to effectively boost its performance. Herein, a self-sustained water-splitting system originated from the heterostructure of perovskite oxide with 2D Ti_3C_2T_x MXene on Ni foam (La_(1-x)Sr_xCoO_3/Ti_3C_2T_x MXene/Ni) that shows high activity for solarpowered water evaporation and simultaneous electrocatalytic water splitting is presented. The all-in-one interfacial electrocatalyst exhibits highly improved oxygen evolution reaction (OER) performance with a low overpotential of 279 mV at 10 mA cm~(?2) and a small Tafel slope of 74.3 mV dec~(?1), superior to previously reported perovskite oxide-based electrocatalysts. Density functional theory calculations reveal that the integration of La_(0.9)Sr_(0.1)CoO_3 with Ti_3C_2T_x MXene can lower the energy barrier for the electron transfer and decrease the OER overpotential, while COMSOL simulations unveil that interfacial solar evaporation could induce OH~? enrichment near the catalyst surfaces and enhance the convection flow above the catalysts to remove the generated gas, remarkably accelerating the kinetics of electrocatalytic water splitting.

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来源
《Advanced functional materials》 |2023年第21期|2215061.1-2215061.10|共10页
作者
Yi Lu; Hao Zhang; Yida WangXiaorong ZhuWeiping XiaoHaolan XuGaoran LiYafei LiDeqi FanHaibo ZengZupeng ChenXiaofei Yang;
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Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials College of Science Nanjing Forestry University Nanjing 210037, China;

Future Industries Institute UniSA STEM University of South Australia Mawson Lakes Campus, Adelaide, South Australia 5095, Australia;

Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials Science Nanjing Normal University Nanjing, Jiangsu 210023, ChinaInstitute of Optoelectronics & Nanomaterials MIIT Key Laboratory of Advanced Display Materials and Devices School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094, China;

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2D MXenes; electrocatalytic water splitting; heterostructures; interfacial solar evaporation; perovskite oxides;

Solar-Driven Interfacial Evaporation Accelerated Electrocatalytic Water Splitting on 2D Perovskite Oxide/MXene Heterostructure

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