Decorating WSe2 nanosheets with ultrafine Ru nanoparticles for boosting electrocatalytic hydrogen evolution in alkaline electrolytes

2019 ◽  
Vol 6 (6) ◽  
pp. 1382-1387 ◽  
Author(s):  
Yuanmeng Zhao ◽  
Guixiang Mao ◽  
Chaozhang Huang ◽  
Ping Cai ◽  
Gongzhen Cheng ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Media ◽  
Synthetic Approach ◽  
Synergy Effect ◽  
Ru Nanoparticles ◽  
Alkaline Electrolytes

Ultrafine Ru nanoparticle decorated WSe2 nanosheets have been synthesized through a colloidal synthetic approach, which exhibit superior hydrogen evolution reaction (HER) performance in alkaline media due to the interfacial synergy effect.

Ultralow loading of ruthenium nanoparticles on nitrogen-doped porous carbon enables ultrahigh mass activity for the hydrogen evolution reaction in alkaline media

2021 ◽  
Author(s):  
Qianjun Zhi ◽  
Shuaibo Qin ◽  
Wenping Liu ◽  
Rong Jiang ◽  
Tingting Sun ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Porous Carbon ◽  
Alkaline Media ◽  
Ruthenium Nanoparticles ◽  
Nitrogen Doped ◽  
Ru Nanoparticles ◽  
Mass Activity

Carbon-supported ultrafine Ru nanoparticles with 0.44 wt% Ru loading displayed ultrahigh activity towards hydrogen evolution reaction in alkaline media.

scholarly journals Preparation of Robust Hydrogen Evolution Reaction Electrocatalyst WC/C by Molten Salt

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1621
Author(s):  
Pengpeng Yan ◽  
Yuchen Wu ◽  
Xiaofeng Wei ◽  
Xuewei Zhu ◽  
Wei Su
Keyword(s):  
Molten Salt ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Low Cost ◽  
Alkaline Media ◽  
Synthetic Approach ◽  
Highly Active ◽  
Tafel Slopes ◽  
One Step ◽  
A Current

Tungsten carbide (WC) is an alternative to the costly and resource-constrained Pt-based catalysts for hydrogen evolution reaction (HER). In this work, a one-step facile and easily scalable approach is reported, to synthesize ultrafine WC by molten salt. Benefiting from the ideal synergistic catalytic effect between the highly active WC nanoparticles and the conductive graphitic carbon, and strong charge transfer ability, the unique WC/C hybrids demonstrated excellent HER performance in both acid and alkaline medias with overpotentials of 112 and 122 mV, at a current density of 10 mA cm−2 and Tafel slopes of 54.4 and 68.8 mV dec−1, in acid and alkaline media, and remarkable stability. With the simplicity and low-cost of the synthetic approach, the strategy presented here can be extendable to the preparation of other transition metal-based/carbon hybrids for versatile applications.

scholarly journals Oxygen Reduction Reaction and Hydrogen Evolution Reaction Catalyzed by Pd–Ru Nanoparticles Encapsulated in Porous Carbon Nanosheets

Catalysts ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 329 ◽  
Author(s):  
Juntai Tian ◽  
Wen Wu ◽  
Zhenghua Tang ◽  
Yuan Wu ◽  
Robert Burns ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Porous Carbon ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Carbon Nanosheets ◽  
X Ray ◽  
Ru Nanoparticles

Developing bi-functional electrocatalysts for both oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) is crucial for enhancing the energy transfer efficiency of metal–air batteries and fuel cells, as well as producing hydrogen with a high purity. Herein, a series of Pd–Ru alloyed nanoparticles encapsulated in porous carbon nanosheets (CNs) were synthesized and employed as a bifunctional electrocatalyst for both ORR and HER. The TEM measurements showed that Pd–Ru nanoparticles, with a size of approximately 1–5 nm, were uniformly dispersed on the carbon nanosheets. The crystal and electronic structures of the PdxRu100−x/CNs series were revealed by powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The as-prepared samples exhibited effective ORR activity in alkaline media and excellent HER activity in both alkaline and acid solutions. The Pd50Ru50/CNs sample displayed the best activity and stability among the series, which is comparable and superior to that of commercial 10% Pd/C. For ORR, the Pd50Ru50/CNs catalyst exhibited an onset potential of 0.903 V vs. RHE (Reversible Hydrogen Electrode) and 11.4% decrease of the current density after 30,000 s of continuous operation in stability test. For HER, the Pd50Ru50/CNs catalyst displayed an overpotential of 37.3 mV and 45.1 mV at 10 mA cm−2 in 0.1 M KOH and 0.5 M H2SO4, respectively. The strategy for encapsulating bimetallic alloys within porous carbon materials is promising for fabricating sustainable energy toward electrocatalysts with multiple electrocatalytic activities for energy related applications.

Surface Strain Engineered Ni-NiO for Boosting Hydrogen Evolution Reaction in Alkaline Media

2021 ◽  
pp. 138985
Author(s):  
Xuerui Yi ◽  
Xiaobo He ◽  
Fengxiang Yin ◽  
Guoru Li ◽  
Zhichun Li
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Surface Strain ◽  
Alkaline Media

Oxygen-deficient TiO2 and carbon coupling synergistically boost the activity of Ru nanoparticles for the alkaline hydrogen evolution reaction

2021 ◽  
Vol 9 (16) ◽  
pp. 10160-10168
Author(s):  
Zhongzhe Wei ◽  
Zijiang Zhao ◽  
Jing Wang ◽  
Qiang Zhou ◽  
Chenxia Zhao ◽  
...  
Keyword(s):  
Band Gap ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
One Pot ◽  
Carbon Nanocomposites ◽  
Ru Nanoparticles

Ru nanoparticles/oxygen-deficient TiO2@carbon nanocomposites are efficiently fabricated via one-pot pyrolysis. TiO2-VO and carbon narrow the band gap, optimize ΔGH2O and ΔGH* and synergistically boost the activity of Ru for the alkaline HER.

Nickel-based electrodes as catalysts for hydrogen evolution reaction in alkaline media

Ionics ◽  
2017 ◽  
Vol 24 (4) ◽  
pp. 1121-1127 ◽  
Author(s):  
Yanbing Zhu ◽  
Tao Liu ◽  
Liming Li ◽  
Shili Song ◽  
Rui Ding
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Media ◽  
Nickel Based Electrodes
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