Balancing electron transfer and intermediate adsorption ability of metallic Ni-Fe-RE-P bifunctional catalysts via 4f-2p-3d electron interaction for enhanced water splitting

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外文摘要：Balancing electron transfer and intermediate adsorption ability of bifunctional catalysts via tailoring elec-tronic structures is crucial for green hydrogen production,while it still remains challenging due to lack-ing efficient strategies.Herein,one efficient and universal strategy is developed to greatly regulate electronic structures of the metallic Ni-Fe-P catalysts via in-situ introducing the rare earth(RE)atoms(Ni-Fe-RE-P,RE=La,Ce,Pr,and Nd).Accordingly,the as-prepared optimal Ni-Fe-Ce-P/CC self-supported bifunctional electrodes exhibited superior electrocatalytic activity and excellent stability with the low overpotentials of 247 and 331 mV at 100 mA cm-2 for HER and OER,respectively.In the assem-bled electrolyzer,the Ni-Fe-Ce-P/CC as bifunctional electrodes displayed low operation potential of 1.49 V to achieve a current density of 10 mA cm-2,and the catalytic performance can be maintained for 100 h.Experimental results combined with density functional theory(DFT)calculation reveal that Ce doping leads to electron decentralization and crystal structure distortion,which can tailor the band structures and d-band center of Ni-Fe-P,further increasing conductivity and optimizing intermediate adsorption energy.Our work not only proposes a valuable strategy to regulate the electron transfer and intermediate adsorption of electrocatalysts via RE atoms doping,but also provides a deep under-standing of regulation mechanism of metallic electrocatalysts for enhanced water splitting.

外文关键词：

RE atomsElectron transferAdsorption energyOxygen evolutionHydrogen evolution

作者：

Hong-Rui Zhao、Cheng-Zong Yuan、Chenliang Zhou、Wenkai Zhao、Lunliang Zhang、Cong-Hui Li、Lei Xin、Fuling Wu、Shufeng Ye、Xiaomeng Zhang、Yunfa Chen

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作者单位：

School of Rare Earths,University of Science and Technology of China,Hefei 230026,Anhui,China

Jiangxi Province Research Institute of Rare Earths,Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341119,Jiangxi,China

State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China

基金：

National Key Technology R&D Program of ChinaNational Key Technology R&D Program of ChinaNational Key Technology R&D Program of ChinaDouble Thousand Plan of Jiangxi ProvinceNatural Science Foundation and Overseas Talent Projects of Jiangxi ProvinceNatural Science Foundation and Overseas Talent Projects of Jiangxi Province

项目编号：

2021YFB35008012022YFC39015032022YFB3504302jxsq202320100220232BAB21402520232BCJ25044

出版年：

2024

DOI：

10.1016/j.jechem.2024.03.005

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)：2024.94(7)