Fe and Cu dual-doped Ni3S4 nanoarray with less low-valence Ni species for boosting water oxidation reaction

2022 ◽  
Xiaoqiang Du ◽  
Jiaxin Li ◽  
Xiaoshuang Zhang

Transition metal materials with high efficiency and durable electrocatalytic water splitting activity have aroused widespread concern among scientists. In this work, two cation co-doped Ni3S4 nanoarrays grown on Ni foam...

Nanoscale ◽  
2022 ◽  
Zhikai Shi ◽  
Zebin Yu ◽  
Juan Guo ◽  
Ronghua Jiang ◽  
Yanping Hou ◽  

Lattice distortion is an important way to improve the electrocatalytic performance and stability of two-dimensional transition metal materials (2d-TMSs). Herein, a lattice distortion nickel-molybdenum sulfide electrocatalyst on foam nickel (NiMoS4-12/NF)...

Di Li ◽  
Yingying Xing ◽  
Changjian Zhou ◽  
Yikai Lu ◽  
Shengjie Xu ◽  

The high reaction energy barrier of the oxygen evolution reaction (OER) extremely reduces the efficiency of water splitting, which is not conducive to large-scale production of hydrogen. Due to the...

2021 ◽  
Guangjin Zhang ◽  
Victor Charles ◽  
Yong Yang ◽  
Menglei Yuan ◽  
Jitao Zhang ◽  

Water oxidation reaction involves a four electron-proton coupled process that is kinetically sluggish and has hindered the widespread application of water-splitting technology. Metal-MOF-coupled heterostructures serve as good OER electrocatalysts due...

2020 ◽  
Rong Chen ◽  
Gui-Lin Zhuang ◽  
Zhi-Ye Wang ◽  
Yi-Jing Gao ◽  
Zhe Li ◽  

Abstract Photosynthesis in nature uses the Mn4CaO5 cluster as the oxygen-evolving center to catalyze the water oxidation efficiently in photosystem II (PS II). Herein, we demonstrate a bio-inspired heterometallic cluster LnCo3 (Ln = Nd, Eu and Ce) clusters, which can be viewed as synthetic analogs of CaMn4O5 cluster. Anchoring LnCo3 on phosphorus-doped graphitic carbon nitrides (PCN) shows efficient overall water splitting without any sacrificial reagents. The NdCo3/PCN-c photocatalyst exhibits excellent water splitting activity and a quantum efficiency of 2.0% at 350 nm. Ultrafast transient absorption (TA) spectroscopy revealed the transfer of photoexcited electron and hole into the PCN and LnCo3 for hydrogen and oxygen evolution reactions, respectively. DFT calculation showed the cooperative water activation on lanthanide and O-O bond formation on transition metal for water oxidation. This work not only prepares a synthetic model of bio-inspired oxygen-evolving center but also provides an effective strategy to realize light-driven overall water splitting.

2018 ◽  
Vol 6 (1) ◽  
pp. 167-178 ◽  
Zhengcui Wu ◽  
Xia Wang ◽  
Jiansong Huang ◽  
Feng Gao

A Co-doped NiO/NiFe2O4 mesoporous nanosheet array on Ni foam is constructed for highly efficient overall water splitting.

2021 ◽  
Vol 9 ◽  
Jie Ying ◽  
Huan Wang

Electrochemical water splitting involving hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is a greatly promising technology to generate sustainable and renewable energy resources, which relies on the exploration regarding the design of electrocatalysts with high efficiency, high stability, and low cost. Transition metal phosphides (TMPs), as nonprecious metallic electrocatalysts, have been extensively investigated and proved to be high-efficient electrocatalysts in both HER and OER. In this minireview, a general overview of recent progress in developing high-performance TMP electrocatalysts for electrochemical water splitting has been presented. Design strategies including composition engineering by element doping, hybridization, and tuning the molar ratio, structure engineering by porous structures, nanoarray structures, and amorphous structures, and surface/interface engineering by tuning surface wetting states, facet control, and novel substrate are summarized. Key scientific problems and prospective research directions are also briefly discussed.

2016 ◽  
Vol 4 (39) ◽  
pp. 15148-15155 ◽  
Fangwang Ming ◽  
Hanfeng Liang ◽  
Huanhuan Shi ◽  
Xun Xu ◽  
Gui Mei ◽  

Metal organic framework (MOF)-derived Co-doped nickel selenide/C hybrid nanostructure supported on Ni foam can efficiently catalyze the overall water splitting.

2016 ◽  
Vol 18 (42) ◽  
pp. 29561-29570 ◽  
Nongnuch Artrith ◽  
Wutthigrai Sailuam ◽  
Sukit Limpijumnong ◽  
Alexie M. Kolpak

Transition-metal doping can significantly improve the catalytic activity of BaTiO3 for water oxidation. Modification of earth-abundant perovskites can be a promising avenue towards inexpensive catalysts for water electrolysis.

2016 ◽  
Vol 28 (42) ◽  
pp. 9266-9291 ◽  
Lei Han ◽  
Shaojun Dong ◽  
Erkang Wang

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