首页|3D-Printed Monolith Metallic Ni-Mo Electrodes for Ultrahigh Current Hydrogen Evolution

3D-Printed Monolith Metallic Ni-Mo Electrodes for Ultrahigh Current Hydrogen Evolution

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In this work,we reported a series of monolithic 3D-printed Ni-Mo alloy electrodes for highly efficient water splitting at high current density(1500 mA cm-2)with excellent stability,which provides a solution to scale up Ni-Mo catalysts for HER to industry use.All possible Ni-Mo metal/alloy phases were achieved by tuning the atomic composition and heat treatment procedure,and they were investigated through both experiment and simulation,and the optimal NiMo phase shows the best performance.Density functional theory(DFT)calculations elucidate that the NiMo phase has the lowest H2O dissociation energy,which further explains the exceptional performance of NiMo.In addition,the microporosity was modulated via controlled thermal treatment,indicating that the 1100 ℃ sintered sample has the best catalytic performance,which is attributed to the high electrochemically active surface area(ECSA).Finally,the four different macrostructures were achieved by 3D printing,and they further improved the catalytic performance.The gyroid structure exhibits the best catalytic performance of driving 500 mA cm-2 at a low overpotential of 228 mV and 1500 mA cm-2 at 325 mV,as it maximizes the efficient bubble removal from the electrode surface,which offers the great potential for high current density water splitting.

3D-printed electrodeNi-Mo catalystphase tuningultra-high current density HER

Yanran Xun、Hongmei Jin、Yuemeng Li、Shixiang Zhou、Kaixi Zhang、Xi Xu、Win Jonhson、Shuai Chang、Teck Leong Tan、Jun Ding

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Department of Materials Science and Engineering,National University of Singapore,Singapore 117574,Singapore

Institute of High Performance Computing(IHPC),Agency for Science,Technology and Research(A*STAR),1 Fusionopolis Way,#16-16 Connexis,Singapore 138632,Singapore

Key Laboratory of Flexible Electronics of Zhejiang Province,Ningbo Institute of Northwestern Polytechnical University,Ningbo 315103,China

State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China

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2024

10.1002/eem2.12714

能源与环境材料(英文)

能源与环境材料(英文)

ISSN：
年,卷(期)：2024.7(5)