Author
Xiao Sun
Bio: Xiao Sun is an academic researcher. The author has contributed to research in topics: Catalysis & Electrocatalyst. The author has an hindex of 1, co-authored 1 publications receiving 46 citations.
Topics: Catalysis, Electrocatalyst, Water splitting, Nanosheet
Papers
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TL;DR: In this paper, the authors have successfully loaded MoS2 electrocatalysts onto the Co3O4 nanosheet array to catalyze HER with a low onset potential of ∼76 mV.
59 citations
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TL;DR: In this article, the authors recognized that electrochemical water splitting is a practical strategy for impelling the transformation of sustainable energy sources such as solar energy from electricity to clean hydrogen fuel.
Abstract: Electrochemical water splitting is recognized as a practical strategy for impelling the transformation of sustainable energy sources such as solar energy from electricity to clean hydrogen fuel. To ...
306 citations
TL;DR: In this article, the authors reviewed the activity, stability and durability for hydrogen evolution reaction in alkaline medium of different types of recently reported potential electrocatalysts such as Ni, Co, NiCo, Fe, Cu, W, Mo, Se, Mn, Zn, V, and metal free based earth-abundant-electrocatalyst.
296 citations
TL;DR: In this article, vertically aligned oxygenated-CoS2-MoS2 (O-CoMoS) heteronanosheets grown on flexible carbon fiber cloth as bifunctional electrocatalysts have been produced by use of Anderson-type (NH4)4[CoIIMo6O24H6]·6H2O polyoxometalate as bimetal precursor.
Abstract: To achieve efficient conversion of renewable energy sources through water splitting, low-cost, earth-abundant, and robust electrocatalysts for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are required. Herein, vertically aligned oxygenated-CoS2–MoS2 (O-CoMoS) heteronanosheets grown on flexible carbon fiber cloth as bifunctional electrocatalysts have been produced by use of the Anderson-type (NH4)4[CoIIMo6O24H6]·6H2O polyoxometalate as bimetal precursor. In comparison to different O-FeMoS, O-NiMoS, and MoS2 nanosheet arrays, the O-CoMoS heteronanosheet array exhibited low overpotentials of 97 and 272 mV to reach a current density of 10 mA cm–2 in alkaline solution for the HER and OER, respectively. Assembled as an electrolyzer for overall water splitting, O-CoMoS heteronanosheets as both the anode and cathode deliver a current density of 10 mA cm–2 at a quite low cell voltage of 1.6 V. This O-CoMoS architecture is highly advantageous for a disordered structure, exposure of acti...
243 citations
TL;DR: In this paper, a simple nitrogen treatment strategy was proposed to controllably hybridize Ni5P4 porous nanosheets with amorphous nickel hydr(oxy)oxide [Ni2+δOδ(OH)2−δ] layer and utilize as efficient electrocatalyst for hydrogen evolution reaction (HER) in neutral (real seawater), alkaline and acidic media.
Abstract: Hybrid engineering of electrocatalysts is still very challenging for electrochemical water splitting. Ni5P4 is a promising electrocatalyst for hydrogen evolution reaction (HER) but the formation of phosphide-hydrogen on Ni5P4 (P-Hads) bonds usually weakens the HER activity. Herein, we report a simple nitrogen treatment strategy to controllably hybridize Ni5P4 porous nanosheets with amorphous nickel hydr(oxy)oxide [Ni2+δOδ(OH)2−δ] layer and utilize as efficient electrocatalyst for hydrogen evolution reaction (HER) in neutral (real seawater), alkaline and acidic media. The in situ derived Ni5P4@Ni2+δOδ(OH)2−δ hybrid nanosheets can be obtained by annealing the nickel hydroxide-precursor nanosheets coupled with decomposition of NaH2PO2·H2O in nitrogen atmosphere. Benefiting from the thin amorphous Ni2+δOδ(OH)2−δ coated layer, the optimized Ni5P4@Ni2+δOδ(OH)2−δ with 3 nm amorphous layer achieve a current density of 10 mA cm−2 at low overpotential of 87, 144 and 66 mV in alkaline, seawater and acidic media, respectively. Theoretical and experimental analyses show that the hybridization of Ni5P4 and Ni2+δOδ(OH)2−δ could not only serve as protection to further enhance the electrocatalytic properties and high surface area of the hybrid electrocatalyst but also create good electronic interaction and synergistic properties for suppressing P-Hads bonds, which is beneficial for promoting water adsorption and optimizing the free energy of hydrogen adsorption for triggering the catalytic pathway at all pH range. This work offers new insights for facile designing of non-precious transition metal compound hybrids for HER with enhancing electrocatalytic performance and opens a promising pathway for hydrogen production at all-pH range.
224 citations