Journal ArticleDOI
Fabrication of Nickel–Cobalt Bimetal Phosphide Nanocages for Enhanced Oxygen Evolution Catalysis
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TLDR
In this paper, the Ni0.6Co1.4P nanocages derived from Ni 0.4(OH)2 bimetal compounds were used for oxygen evolution reaction (OER) catalysts.Abstract:
Replacement of precious metals with earth-abundant electrocatalysts for oxygen evolution reaction (OER) holds great promise for realizing practically viable water-splitting systems. It still remains a great challenge to develop low-cost, highly efficient, and durable OER catalysts. Here, the composition and morphology of Ni–Co bimetal phosphide nanocages are engineered for a highly efficient and durable OER electrocatalyst. The nanocage structure enlarges the effective specific area and facilitates the contact between catalyst and electrolyte. The as-prepared Ni–Co bimetal phosphide nanocages show superior OER performance compared with Ni2P and CoP nanocages. By controlling the molar ratio of Ni/Co atoms in Ni–Co bimetal hydroxides, the Ni0.6Co1.4P nanocages derived from Ni0.6Co1.4(OH)2 nanocages exhibit remarkable OER catalytic activity (η = 300 mV at 10 mA cm−2) and long-term stability (10 h for continuous test). The density-functional-theory calculations suggest that the appropriate Co doping concentration increases density of states at the Fermi level and makes the d-states more close to Fermi level, giving rise to high charge carrier density and low intermedia adsorption energy than those of Ni2P and CoP. This work also provides a general approach to optimize the catalysis performance of bimetal compounds.read more
Citations
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Journal ArticleDOI
Nanoarchitectonics for Transition-Metal-Sulfide-Based Electrocatalysts for Water Splitting.
Yanna Guo,Yanna Guo,Teahoon Park,Jin Woo Yi,Joel Henzie,Jeonghun Kim,Zhongli Wang,Bo Jiang,Yoshio Bando,Yoshiyuki Sugahara,Jing Tang,Yusuke Yamauchi +11 more
TL;DR: Insightful insights gathered in the process of studying TMS are provided, and valuable guidelines for engineering other kinds of nanomaterial catalysts for energy conversion and storage technologies are described.
Journal ArticleDOI
Non-noble metal-nitride based electrocatalysts for high-performance alkaline seawater electrolysis
Luo Yu,Qing Zhu,Shaowei Song,Brian McElhenny,Dezhi Wang,Chunzheng Wu,Zhaojun Qin,Jiming Bao,Ying Yu,Shuo Chen,Zhifeng Ren +10 more
TL;DR: A three-dimensional core-shell metal-nitride catalyst consisting of NiFeN nanoparticles uniformly decorated on NiMoN nanorods supported on Ni foam serves as an eminently active and durable oxygen evolution reaction catalyst for alkaline seawater electrolysis.
Journal ArticleDOI
Ultrafast room-temperature synthesis of porous S-doped Ni/Fe (oxy)hydroxide electrodes for oxygen evolution catalysis in seawater splitting
Luo Yu,Luo Yu,Libo Wu,Brian McElhenny,Shaowei Song,Dan Luo,Fanghao Zhang,Ying Yu,Shuo Chen,Zhifeng Ren +9 more
TL;DR: In this article, the surface of Ni foam is engineered into a rough S-doped Ni/Fe (oxy)hydroxide layer, which exhibits extraordinary oxygen evolution reaction (OER) performance in both alkaline salty water and seawater electrolytes.
Journal ArticleDOI
A Simple Synthetic Strategy toward Defect‐Rich Porous Monolayer NiFe‐Layered Double Hydroxide Nanosheets for Efficient Electrocatalytic Water Oxidation
Journal ArticleDOI
Tailoring the d-Band Centers Endows (NixFe1–x)2P Nanosheets with Efficient Oxygen Evolution Catalysis
TL;DR: The rational design of OER catalysts from the perspective of electronic structure is highly desirable to optimize electrocatalytic activity as mentioned in this paper, and it is desirable to design a rational OER catalyst from the point of view of the electronic structure.
References
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Self-Consistent Equations Including Exchange and Correlation Effects
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TL;DR: In this paper, the Hartree and Hartree-Fock equations are applied to a uniform electron gas, where the exchange and correlation portions of the chemical potential of the gas are used as additional effective potentials.
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Resolving surface chemical states in XPS analysis of first row transition metals, oxides and hydroxides: Sc, Ti, V, Cu and Zn
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Journal ArticleDOI
Metal–Organic Framework Derived Hybrid Co3O4-Carbon Porous Nanowire Arrays as Reversible Oxygen Evolution Electrodes
TL;DR: The achieved ultrahigh oxygen evolution activity and strong durability, with superior performance in comparison to the state-of-the-art noble-metal/transition-metal and nonmetal catalysts, originate from the unique nanowire array electrode configuration and in situ carbon incorporation, which lead to the large active surface area, enhanced mass/charge transport capability, easy release of oxygen gas bubbles, and strong structural stability.