Journal ArticleDOI
In Situ Fabrication of Heterostructure on Nickel Foam with Tuned Composition for Enhancing Water-Splitting Performance.
Xuerong Zheng,Yiqi Zhang,Hui Liu,Dongju Fu,Jianjun Chen,Jihui Wang,Cheng Zhong,Yida Deng,Xiaopeng Han,Wenbin Hu +9 more
TLDR
This work should shed light on the controllable synthesis of metal-based hybrid materials and provide a promising direction for developing the highest-performing electrocatalysts based on interfacial and heterostructural regulation for advanced electrochemical energy conversion technologies.Abstract:
Exploiting economical and high-performance bifunctional electrocatalysts toward hydrogen and oxygen evolution reactions (HER/OER) is at the heart of overall water splitting in large-scale application. Herein, an in situ and stepwise strategy for synthesizing core-shell Ni3 (S1-x Sex )2 @NiOOH (0 ≤ x ≤ 1) nanoarray heterostructures on nickel foam with tailored compositions for enhancing water-splitting performance is reported. A series of Ni3 (S1-x Sex )2 nanostructures is firstly grown on nickel foam via an in situ reaction in a heated polyol solution system. Ni3 (S1-x Sex )2 @NiOOH nanocomposites are subsequently prepared via electrochemical oxidation and the oxidation degree is systematically investigated by varying the oxidation time. Benefitting from the vertical standing architecture, abundant exposed active sites, and synergetically interfacial enhancement, Ni3 (S0.25 Se0.75 )2 @NiOOH heterojunctions with electrochemical polarization for 8 h exhibit superior HER and OER behaviors, achieving a water-splitting current density of 10 mA cm-2 at a small overpotential of 320 mV as well as boosted reaction kinetics and long-term stability. This work should shed light on the controllable synthesis of metal-based hybrid materials and provide a promising direction for developing the highest-performing electrocatalysts based on interfacial and heterostructural regulation for advanced electrochemical energy conversion technologies.read more
Citations
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Journal ArticleDOI
Atomically Dispersed Binary Co-Ni Sites in Nitrogen-Doped Hollow Carbon Nanocubes for Reversible Oxygen Reduction and Evolution.
Xiaopeng Han,Xiaofei Ling,Deshuang Yu,Dengyu Xie,Linlin Li,Shengjie Peng,Cheng Zhong,Naiqin Zhao,Yida Deng,Wenbin Hu,Wenbin Hu +10 more
TL;DR: Light is shed on the controlled synthesis of atomically isolated advanced materials, and deeper understanding is provided on the structure-performance relationships of nanocatalysts with multiple active sites for various catalytic applications.
Journal ArticleDOI
Engineering Ni2P-NiSe2 heterostructure interface for highly efficient alkaline hydrogen evolution
Caichi Liu,Tao Gong,Jun Zhang,Xuerong Zheng,Xuerong Zheng,Jing Mao,Hui Liu,Ying Li,Qiuyan Hao +8 more
TL;DR: In this paper, a self-supported heterostructure catalyst in the form of Ni2P-NiSe2, which is obtained by phosphorization of NiSe2 nanosheet arrays grown on the carbon cloth, was reported.
Journal ArticleDOI
Tremella-like Ni3S2/MnS with ultrathin nanosheets and abundant oxygen vacancies directly used for high speed overall water splitting
TL;DR: In this paper, a tremella-like Ni3S2/MnS-O with ultrathin nanosheets and abundant oxygen vacancies was obtained for hydrogen evolution reaction and oxygen evolution reaction bifunctional performances.
Journal ArticleDOI
Anion Etching for Accessing Rapid and Deep Self-Reconstruction of Precatalysts for Water Oxidation
Yang Wang,Yang Wang,Yinlong Zhu,Shenlong Zhao,Sixuan She,Feifei Zhang,Yu Chen,Tim Williams,Thomas R. Gengenbach,Lianhai Zu,Haiyan Mao,Wei Zhou,Zongping Shao,Huanting Wang,Jing Tang,Dongyuan Zhao,Dongyuan Zhao,Cordelia Selomulya,Cordelia Selomulya +18 more
TL;DR: In this article, a new class of transition metal-based nanomaterials for the oxygen evolution reaction (OER) in alkaline electrolyzers has been proposed, which can achieve highly active OER species by a rapid and deep self-reconstruction.
Journal ArticleDOI
Controllable synthesis of nickel sulfide nanocatalysts and their phase-dependent performance for overall water splitting.
Xuerong Zheng,Xiaopeng Han,Xiaopeng Han,Yiqi Zhang,Jihui Wang,Cheng Zhong,Yida Deng,Wenbin Hu +7 more
TL;DR: Electrochemical results reveal that Ni3S2 exhibits superior OER and HER performance to NiS and NiS2, which could be attributed to the intrinsic metallic conductivity, abundant active sites and optimal Gibbs free-energy for catalyst-H* for HER.
References
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Journal ArticleDOI
Enhanced Hydrogen Evolution Catalysis from Chemically Exfoliated Metallic MoS2 Nanosheets
TL;DR: Structural characterization and electrochemical studies confirmed that the nanosheets of the metallic MoS2 polymorph exhibit facile electrode kinetics and low-loss electrical transport and possess a proliferated density of catalytic active sites, which make these metallic nanOSheets a highly competitive earth-abundant HER catalyst.
Journal ArticleDOI
Electrocatalytic Oxygen Evolution Reaction (OER) on Ru, Ir, and Pt Catalysts: A Comparative Study of Nanoparticles and Bulk Materials
TL;DR: In this article, the intrinsic catalytic activity and durability of carbon supported Ru, Ir, and Pt nanoparticles and corresponding bulk materials for the electrocatalytic oxygen evolution reaction (OER) were examined by surface-sensitive cyclic voltammetry.
Journal ArticleDOI
Advancing the Electrochemistry of the Hydrogen-Evolution Reaction through Combining Experiment and Theory
TL;DR: A critical appraisal of both theoretical and experimental studies of HER electrocatalysts with special emphasis on the electronic structure, surface (electro)chemistry, and molecular design addresses the importance of correlating theoretical calculations and electrochemical measurements toward better understanding of Her electrocatalysis at the atomic level.
Journal ArticleDOI
NiSe Nanowire Film Supported on Nickel Foam: An Efficient and Stable 3D Bifunctional Electrode for Full Water Splitting
TL;DR: The growth of NiSe nanowire film on nickel foam (NiSe/NF) in situ by hydrothermal treatment of NF using NaHSe as Se source is presented.
Journal ArticleDOI
Ni2P as a Janus catalyst for water splitting: the oxygen evolution activity of Ni2P nanoparticles
TL;DR: In this paper, the Ni2P nanoparticles were used as both cathode and anode catalysts for an alkaline electrolyzer, which generated 10 mA cm−2 at 1.63 V.
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