2D phosphides heterostructures on titanium microfiltration membrane for enhanced ampere-level current density overall seawater splitting  

作　　者：Wenjing Dai Xin Wang Yulong Ma Sisi He Ming Chen Zhaohui Yin Shuheng Tian Maolin Wang Shixiang Yu Hang Zhang Yuanzhe Wang Hong Wang Jianxin Li Faming Gao Bowen Cheng Yun Wang Zhen Yin Ding Ma 

机构地区：[1]Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization,College of Chemical Engineering and Materials Science,Tianjin University of Science and Technology,Tianjin 300457,China [2]State Key Laboratory of Biobased Fiber Manufacturing Technology,Tianjin University of Science and Technology,Tianjin 300457,China [3]Haian Institute of High-Tech Research,Nanjing University,Haian 226600,China [4]Beijing National Laboratory for Molecular Sciences,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China [5]State Key Laboratory of Separation Membranes and Membrane Processes,Separation Membrane Science and Technology International Joint Research Centre,Tiangong University,Tianjin 300387,China [6]Centre for Catalysis and Clean Energy,School of Environment and Science,Gold Coast Campus,Griffith University,Southport,Queensland 4222,Australia

出　　处：《Nano Research》2025年第1期249-259,共11页纳米研究（英文版）

基　　金：support of the Natural Science Foundation of Tianjin for Distinguished Young Scholar(No.20JCJQJC00150);Basic Research Program of Jiangsu Province(No.BK20241845);the National Natural Science Foundation of China(No.21872104);Tianjin Research Innovation Project for Postgraduate Students(No.2022BKY135);the National Key Research and Development Program of China(Nos.2020YFA0211003 and 2020YFA0211002).

摘　　要：The advancement of direct seawater electrolysis is a significant step towards sustainable hydrogen production,addressing the critical need for renewable energy sources and efficient resource utilization.However,direct seawater electrolysis has to face several challenges posed by the corrosiveness of highly concentrated chloride and the competitive chlorine evolution reaction(ClER).To overcome these issues,we designed a novel NiP_(2)@CoP electrocatalyst on a porous titanium microfiltration(Ti MF)membrane.The obtained bifunctional NiP_(2)@CoP catalyst outperforms the Pt/C and IrO_(2),as evidenced by its low overpotentials of 192 and 425 mV at a current density of 500 mA·cm^(-2) for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in alkaline seawater(1 M KOH+0.5 M NaCl),respectively.Especially,only 231 and 569 mV overpotentials are required at the current density of 1500 mA·cm^(-2) towards HER and OER in alkaline seawater,respectively.More importantly,no ClER was observed,demonstrating its excellent selectivity to OER.The selection of porous Ti MF membrane as an electrode substrate further enhances the performance by providing a robust structure that promotes the fast generation and release of gas bubbles.Our promising outcomes obtained with NiP_(2)@CoP catalysts on Ti MF support,therefore,pave the way for the commercial viability of direct seawater electrolysis technologies at industrial-level current densities.

关 键 词：direct seawater electrolysis porous titanium microfiltration membrane phosphides heterostructures NiP_(2)@CoP electrocatalyst excellent selectivity to oxygen evolution reaction(OER) 

分 类 号：O64[理学—物理化学]