Weakening hydrogen adsorption on nickel via interstitial nitrogen doping promotes bifunctional hydrogen electrocatalysis in alkaline solution

2019 ◽  
Vol 12 (12) ◽  
pp. 3522-3529 ◽  
Author(s):  
Tingting Wang ◽  
Miao Wang ◽  
Hao Yang ◽  
Mingquan Xu ◽  
Chuandong Zuo ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
Oxidation Reaction ◽  
Nitrogen Doping ◽  
Hydrogen Adsorption ◽  
Hydrogen Oxidation ◽  
Hydrogen Oxidation Reaction ◽  
Interstitial Nitrogen

Ni3N nanoparticles are promising candidates for the electrocatalytic hydrogen oxidation reaction and hydrogen evolution reaction in alkaline solution.

Amine-ligand modulated ruthenium nanoclusters as a superior bi-functional hydrogen electrocatalyst in alkaline media

2021 ◽  
Author(s):  
Jie Wang ◽  
Jing Liu ◽  
Boyang Zhang ◽  
Jie Gao ◽  
Guangbo Liu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Alkaline Media ◽  
Hydrogen Oxidation Reaction ◽  
Amine Ligand

Amine-ligand modulated Ru nanoclusters (Ru/PEI-XC) as an active and stable bi-functional catalyst for the alkaline hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) are successfully developed.

scholarly journals High Hydrogen Evolution Reaction (HER) and Hydrogen Oxidation Reaction (HOR) Activity RhxSy Catalyst Synthesized with Na2S for Hydrogen-Bromine Fuel Cell

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3971
Author(s):  
Yuanchao Li ◽  
Trung Van Nguyen
Keyword(s):  
Fuel Cell ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
High Mass ◽  
Support Surface ◽  
Sulfur Source ◽  
Hydrogen Oxidation Reaction ◽  
High Hydrogen

A RhxSy/C catalyst with high mass-specific electrochemical surface area (ECSA/mass), high hydrogen oxidation reaction (HOR)/hydrogen evolution reaction (HER) activity, and high Nafion® ionomer-affinity was synthesized and evaluated. A new sulfur source, Na2S instead of (NH4)2S2O3, was applied to prepare the rhodium sulfide precursor Rh2S3 that resulted in a RhxSy catalyst with higher HOR/HER catalytic activity after thermal treatment. The higher activity was attributed to the higher quantity formation of the more active phase Rh3S4, in addition to the other active Rh17S15 phase, in the RhxSy catalyst. Using this new sulfur source, carbon substrate functionalization, and the mass-transfer-controlled nanoparticle growth process, the average particle size of this catalyst was reduced from 13.5 nm to 3.2 nm, and its ECSA/mass was increased from 9.3 m2/g-Rh to 43.0 m2/g-Rh. Finally, by applying the Baeyer–Villiger and ester hydrolysis process to convert the Nafion® ionomer-unfriendly ketone group on the carbon support surface to the Nafion ionomer-friendly carboxylic group, which increases the Nafion® affinity of this catalyst, its use in the hydrogen electrode of an H2-Br2 fuel cell resulted in a performance that is 2.5× higher than that of the fuel cell with a commercial RhxSy catalyst.

Interphase-oxidized ruthenium metal with half-filled d-orbitals for hydrogen oxidation in an alkaline solution

2020 ◽  
Vol 8 (20) ◽  
pp. 10168-10174
Author(s):  
Jinxia Jiang ◽  
Sicheng Tao ◽  
Qian He ◽  
Jian Wang ◽  
Yuanyuan Zhou ◽  
...  
Keyword(s):  
Alkaline Solution ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
High Reactivity ◽  
Metallic Surface ◽  
Hydrogen Oxidation Reaction ◽  
Anodic Potential ◽  
D Orbitals

The interphase-oxidized Ru clusters with half-filled 4d-orbitals can maintain a metallic surface for binding hydrogen at high anodic potential, leading to a high reactivity for hydrogen oxidation reaction in alkaline.

scholarly journals Tuning the electrocatalytic activity of Pt by structurally ordered PdFe/C for the hydrogen oxidation reaction in alkaline media

2018 ◽  
Vol 6 (24) ◽  
pp. 11346-11352 ◽  
Author(s):  
Weiping Xiao ◽  
Wen Lei ◽  
Jie Wang ◽  
Guoying Gao ◽  
Tonghui Zhao ◽  
...  
Keyword(s):  
Adsorption Energy ◽  
Electrocatalytic Activity ◽  
Oxidation Reaction ◽  
Hydrogen Adsorption ◽  
Hydrogen Oxidation ◽  
Alkaline Media ◽  
Hydrogen Oxidation Reaction

Tuning the hydrogen adsorption energy on Pt surface is essential for enhancing the HOR performance in alkaline media.

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