MOF-on-MOF-Derived Ultrafine Fe2P-Co2P Heterostructures for High-Efficiency and Durable Anion Exchange Membrane Water Electrolyzers

被引:37
作者
Zhang, Hua [1 ,2 ]
Chen, Anran [1 ]
Bi, Zenghui [1 ]
Wang, Xinzhong [3 ]
Liu, Xijun [4 ]
Kong, Qingquan [5 ]
Zhang, Wei [6 ]
Mai, Liqiang [6 ]
Hu, Guangzhi [1 ,2 ]
机构
[1] Yunnan Univ, Sch Mat & Energy, Sch Ecol & Environm Sci, Kunming 650091, Peoples R China
[2] Donghai Lab, Zhoushan 316021, Peoples R China
[3] Shenzhen Inst Informat Technol, Sch Elect Commun Technol, Shenzhen 518172, Peoples R China
[4] Guangxi Univ, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Guangxi Key Lab Proc Nonferrous Met & Featured Mat, Nanning 530004, Peoples R China
[5] Chengdu Univ, Sch Mech Engn, Chengdu 610106, Peoples R China
[6] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
基金
中国国家自然科学基金;
关键词
Anion exchange membrane; Active site swapping; Ligand exchange; Hydrogenevolution reaction; Solar-to-hydrogen; HYDROGEN EVOLUTION; NANOWIRE ARRAYS; ELECTROCATALYST;
D O I
10.1021/acsnano.3c09020
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The alkaline hydrogen evolution reaction (HER) in an anion exchange membrane water electrolyzer (AEMWE) is considered to be a promising approach for large-scale industrial hydrogen production. Nevertheless, it is severely hampered by the inability to operate tolerable HER catalysts consistently under low overpotentials at ampere-level current densities. Here, we develop a universal ligand-exchange (MOF-on-MOF) modulation strategy to synthesize ultrafine Fe2P and Co2P nanoparticles, which are well anchored on N and P dual-doped carbon porous nanosheets (Fe2P-Co2P/NPC). In addition, benefiting from the downshift of the d-band center and the interfacial Co-P-Fe bridging, the electron-rich P site is triggered, which induces the redistribution of electron density and the swapping of active centers, lowering the energy barrier of the HER. As a result, the Fe2P-Co2P/NPC catalyst only requires a low overpotential of 175 mV to achieve a current density of 1000 mA cm(-2). The solar-driven water electrolysis system presents a record-setting and stable solar-to-hydrogen conversion efficiency of 20.36%. Crucially, the catalyst could stably operate at 1000 mA cm(-2) over 1000 h in a practical AEMWE at an estimated cost of US$0.79 per kilogram of H-2, which achieves the target (US$2 per kg of H-2) set by the U.S. Department of Energy (DOE).
引用
收藏
页码:24070 / 24079
页数:10
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