Activating lattice oxygen in NiFe-based (oxy)hydroxide for water electrolysis
Zuyun He,Jun Zhang,Zhiheng Gong,Hang Lei,Deng Zhou,Nian Zhang,Wenjie Mai,Shijun Zhao,Yan Chen +8 more
TL;DR: In this article , a sacrificial template-directed approach was proposed to synthesize Mo-doped NiFe (oxy) hydroxide with modulated oxygen activity as an enhanced electrocatalyst towards oxygen evolution reaction (OER).
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Abstract: Transition metal oxides or (oxy)hydroxides have been intensively investigated as promising electrocatalysts for energy and environmental applications. Oxygen in the lattice was reported recently to actively participate in surface reactions. Herein, we report a sacrificial template-directed approach to synthesize Mo-doped NiFe (oxy)hydroxide with modulated oxygen activity as an enhanced electrocatalyst towards oxygen evolution reaction (OER). The obtained MoNiFe (oxy)hydroxide displays a high mass activity of 1910 A/gmetal at the overpotential of 300 mV. The combination of density functional theory calculations and advanced spectroscopy techniques suggests that the Mo dopant upshifts the O 2p band and weakens the metal-oxygen bond of NiFe (oxy)hydroxide, facilitating oxygen vacancy formation and shifting the reaction pathway for OER. Our results provide critical insights into the role of lattice oxygen in determining the activity of (oxy)hydroxides and demonstrate tuning oxygen activity as a promising approach for constructing highly active electrocatalysts.
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Citations
Heterostructured MoO3 Anchored Defect-Rich NiFe-LDH/NF as a Robust Self-Supporting Electrocatalyst for Overall Water Splitting.
Hualin Jiang,Yunjie Yu,Xu Duan,Ping-Nan Chen,Shuai Wang,Xianhua Qiu,Long Ye,Xinman Tu +7 more
TL;DR: Heteroostructured MoO3 anchored defect-rich NiFe-LDH/NF is a robust self-supporting electrocatalyst for overall water splitting with high catalytic activity and low overpotentials.
27
Protective Cerium Oxide Coating Promoted Ce-Doping and Reconstruction of High-Valence NiFe Sulfide toward Robust Overall Water Splitting.
TL;DR: A CeO2-x coating enhances the stability and activity of a high-valence NiFe sulfide electrocatalyst for oxygen evolution reaction, achieving 260 mV overpotential at 100 mA cm-2 in 1.0 m KOH, and 500 mA cm-2 at 1.73 V cell voltage with 500 h stability.
27
Constructing oxygen vacancies by doping Mo into spinel Co<sub>3</sub>O<sub>4</sub> to trigger a fast oxide path mechanism for acidic oxygen evolution reaction
Xin Yue,Li Sun,Minghui Feng,Yang Peng,Chao Wang,Yiye Shao,Shaoming Huang +6 more
TL;DR: Constructing oxygen vacancies in Mo-doped spinel Co3O4 triggers a fast oxide path mechanism for acidic oxygen evolution reaction, enhancing the catalytic activity and durability of the catalyst.
27
Doping Mo into NiFe LDH/NiSe Heterostructure to Enhance Oxygen Evolution Activity by Synergistically Facilitating Electronic Modulation and Surface Reconstruction.
Yonghao Gan,Zhi Li,Ying Ye,Xiao-qing Dai,Fei Nie,Xu-Wen Yin,Ziteng Ren,Baoqiang Wu,Yihua Cao,Run Zhi Cai,Xin Zhang,Weiyu Song +11 more
TL;DR: In this article , a Mo-doped NiFe LDH/NiSe heterostructure was fabricated for water electrolysis with abundant-earth elements instead of precious metals to realize the sustainable development.
26
Application of heteroatom doping strategy in electrolyzed water catalytic materials
TL;DR: In this article , the application of heteroatom doping strategies in transition metal-based catalytic materials and their latest research progress is reviewed, and the internal relationship of the HOG strategy to the morphology and catalytic activity of electrolyzed water catalytic material is discussed.
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