A solvent-switched in situ confinement approach for immobilizing highly-active ultrafine palladium nanoparticles: boosting catalytic hydrogen evolution

2018 ◽  
Vol 6 (14) ◽  
pp. 5544-5549 ◽  
Author(s):  
Qi-Long Zhu ◽  
Fu-Zhan Song ◽  
Qiu-Ju Wang ◽  
Nobuko Tsumori ◽  
Yuichiro Himeda ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Hydrogen Evolution ◽  
Palladium Nanoparticles ◽  
High Hydrogen ◽  
Highly Active ◽  
Catalytic Hydrogen ◽  
Catalytic Hydrogen Evolution ◽  
Clean Metal

A solvent-switched in situ confinement approach has been developed to synthesize highly active nanocatalysts with ultrafine and clean metal nanoparticles encapsulated within carbon nanopores, over which record-high hydrogen evolution has been achieved under heterogeneous conditions.

A Z-type heterojunction of bimetal sulfide CuNi2S4 and CoWO4 for catalytic hydrogen evolution

2020 ◽  
Vol 49 (19) ◽  
pp. 6457-6470
Author(s):  
Min Mao ◽  
Jing Xu ◽  
Xiaobin Yu ◽  
Ye Liu
Keyword(s):  
Hydrothermal Method ◽  
Hydrogen Evolution ◽  
Photogenerated Electrons ◽  
Catalytic Hydrogen ◽  
Catalytic Hydrogen Evolution ◽  
Effective Transfer

CoWO4 was deposited in situ on CuNi2S4 material by a two-step hydrothermal method. The tight heterogeneous interface formed by the two provides a channel for the effective transfer and utilization of photogenerated electrons.

Highly efficient visible-light-driven catalytic hydrogen evolution from ammonia borane using non-precious metal nanoparticles supported by graphitic carbon nitride

2017 ◽  
Vol 5 (5) ◽  
pp. 2288-2296 ◽  
Author(s):  
Hao Zhang ◽  
Xiaojun Gu ◽  
Penglong Liu ◽  
Jin Song ◽  
Jia Cheng ◽  
...  
Keyword(s):  
Visible Light ◽  
Metal Nanoparticles ◽  
Hydrogen Evolution ◽  
Electron Density ◽  
Precious Metal ◽  
Carbon Nitride ◽  
Room Temperature ◽  
Visible Light Driven ◽  
Catalytic Hydrogen ◽  
Catalytic Hydrogen Evolution

Through enriching the electron density of metal nanoparticles, the non-precious catalysts exhibited ultra-high visible-light-driven activities in room-temperature hydrogen evolution from NH3BH3.

Fabrication of porous nickel–silica composite particles through catalytic hydrogen evolution reaction from aqueous ammonia borane solution

2018 ◽  
Vol 11 (04) ◽  
pp. 1850078
Author(s):  
Tetsuo Umegaki ◽  
Mamoru Takahashi ◽  
Yoshiyuki Kojima
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Evolution ◽  
Sodium Borohydride ◽  
Nickel Content ◽  
Ammonia Borane ◽  
Porous Nickel ◽  
High Hydrogen ◽  
Catalytic Hydrogen ◽  
Catalytic Hydrogen Evolution ◽  
Nickel Species

In this work, we investigated fabrication of porous nickel–silica composite particles through catalytic hydrogen evolution reaction from aqueous solution including sodium borohydride and ammonia borane. Aggregated nickel species were observed in the samples with high nickel content from scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) results, indicating that dispersion of active nickel species was significantly influenced by nickel content. The dispersion influenced hydrogen evolution amount and rate from aqueous solution including sodium borohydride and ammonia borane, and the samples with highly dispersed active nickel species showed high hydrogen evolution amount. The particles after the hydrogen evolution process showed significantly high specific surface area with large number of nanopores. UV-Vis spectra of the samples after the hydrogen evolution process indicated that the particles with high hydrogen evolution amount from aqueous solution including sodium borohydride and ammonia borane included high amount of reduced nickel species.

Chalcogen-vacancy group VI transition metal dichalcogenide nanosheets for electrochemical and photoelectrochemical hydrogen evolution

2021 ◽  
Vol 9 (1) ◽  
pp. 101-109
Author(s):  
In Hye Kwak ◽  
Ik Seon Kwon ◽  
Jong Hyun Lee ◽  
Young Rok Lim ◽  
Jeunghee Park
Keyword(s):  
Transition Metal ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Photoelectrochemical Cells ◽  
Transition Metal Dichalcogenide ◽  
Group Vi ◽  
Catalytic Hydrogen ◽  
Catalytic Hydrogen Evolution

Chalcogen vacancies of MoS2, MoSe2, WS2, and WSe2 nanosheets enhanced the catalytic hydrogen evolution reaction in solar photoelectrochemical cells.

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