B-doping-induced amorphization of LDH for large-current-density hydrogen evolution reaction

Yang, Hongyuan; Chen, Ziliang; Guo, Peifang; Fei, Ben; Wu, Renbing

doi:10.1016/j.apcatb.2019.118240

Cited by 232 publications

(157 citation statements)

References 71 publications

Supporting

Mentioning

156

Contrasting

Order By: Relevance

“…The electronic negativity of borate is much higher than that of Ni, leading to a higher binding energy of Ni 2p in B‐Ni 3 S 4 . Wu and co‐workers reported [ 26 ] that borate can improve proton accepting property. Additionally, the formative NiB bond is favorable to the dissociation of the absorbed water molecule thanks to the modulated OH adsorption energy (Figure 1g), and thus promoting the evolution of H 2 .…”

Section: The Her Catalytic Behaviormentioning

confidence: 99%

Water Dissociation Kinetic‐Oriented Design of Nickel Sulfides via Tailored Dual Sites for Efficient Alkaline Hydrogen Evolution

Wang

Zhang

Song

et al. 2020

Adv Funct Materials

168

View full text Add to dashboard Cite

The reaction kinetics of alkaline hydrogen evolution reactions (HER) is a trade‐off between adsorption and desorption for intermediate species (H2O, OH, and Hads). However, due to the complicated correlation between the intermediates adsorption energy and electronic states, targeted regulating the adsorption energy at the atomic level is not comprehensive. Herein, nonmetals (B, N, O, and F) are used to modulate the adsorption energy and electronic structure of Ni3S4, and propose that H2O and OH adsorption energy are correlate directly with d‐band center (εd) of transition metal Ni, and Hads adsorption energy has a linear dependence on p‐band center (εp) of nonmetal S. Direct experimental evidence is offered that in all nonmetals doping samples, Tafel slope and exchange current density can be improved regularly with the εd and εp, and F‐Ni3S4 shows the optimum activity with tiny overpotential 29 and 92 mV for harvesting current density 10 and 100 mA cm−2, respectively. Furthermore, the micro‐kinetics analysis and density functional theory calculations verify that F‐doping can efficiently reduce the energy barrier of the Volmer step, eventually accelerating the HER kinetics. This work provides atomic‐level insight into the structure‐properties relationship, and opens an avenue for kinetic‐oriented design of alkaline HER and beyond.

show abstract

Section: The Her Catalytic Behaviormentioning

confidence: 99%

Water Dissociation Kinetic‐Oriented Design of Nickel Sulfides via Tailored Dual Sites for Efficient Alkaline Hydrogen Evolution

Wang

Zhang

Song

et al. 2020

Adv Funct Materials

168

View full text Add to dashboard Cite

show abstract

“…[4,5] Thus, it is crucialt od evelop non-precious catalysts that could efficientlyc atalyzew ater splitting. The non-preciousm etal catalysts are recognizeda sh aving broad developmentp rospects and can compensatef or the disadvantages of precious metal catalysts shortage of bifunctionality.A tp resent, low-cost efficient catalysts mainly focus on transition metal (TM) materials [6][7][8][9][10] including layered double hydroxides, [11][12][13][14] nitrides, [15][16][17] sulfides [18][19][20][21][22] and phosphides. [23][24][25][26] In addition, heteroatomdopedm aterials, such as N, Sa nd P-doped carbon, [27][28][29][30] were developed for HER and OER catalysts.…”

Section: Introductionmentioning

confidence: 99%

Hollow Porous MnFe₂O₄ Sphere Grown on Elm‐Money‐Derived Biochar towards Energy‐Saving Full Water Electrolysis

Liu

Huo

Yan

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

The development of inexpensive and efficient bifunctional electrocatalysts is significant for widespreadp ractical applications of overall water splittingt echnology. Herein,aone-pot solvothermal method is used to prepare hollow porousM nFe 2 O 4 spheres, which are grown on natural-abundant elm-money-derived biocharm aterial to construct MnFe 2 O 4 /BC composite. When the overpotential is 156 mV for both the oxygen evolution reaction and the hydrogen evolution reaction, the current density reaches up to 10 mA cm À2 ,a nd its duration is 10 h. At 1.51 V, the overall waterd ecomposition currentd ensity of 10 mA cm À2 can be obtained in 1 m KOH. This work proves that elm-money-derived biochar is av alid substrate for growingh ollow porous spheres.M nFe 2 O 4 /BC give ap romising general strategy for preparing the effective and stable bifunctional catalysis that can be expand to multiple transition metal oxide.

show abstract

“…The corresponding EIS results and their parameters errors are also displayed in Table S2. [28][29][30][31][32] The R ct of Cu (OH) 2 @Co(OH) 2 (4.6 Ω) is smaller than that of Cu(OH) 2 (9.7 Ω), suggesting the smaller charge-diffusion resistance of Cu (OH) 2 @Co(OH) 2 at the interface, and thus resulting in the faster charge diffusion kinetics and higher reaction rates. Combining with overpotential and Tafel results, it reveals that the OER activity of Cu(OH) 2 nanowires are remarkably improved by the electrodeposition of Co(OH) 2 nanoflakes.…”

mentioning

confidence: 98%

Hierarchical Cu(OH)₂@Co(OH)₂ Nanotrees for Water Oxidation Electrolysis

Tang

Courté

et al. 2020

ChemCatChem

View full text Add to dashboard Cite

In order to achieve highly‐efficient water electrolysis, an effective strategy is to design three‐dimensional hierarchical nanostructures by decorating the surface of the main catalysts with co‐catalytic metal compounds. Herein, leave‐like ultrathin Co(OH)2 nanoflakes are grown on branch‐like Cu(OH)2 nanowires via the combination of an anodization process together with an electrodeposition process. The resulting hierarchical Cu(OH)2@Co(OH)2 nanotrees can be used as efficient OER electrocatalysts with an overpotential as low as 283 mV to reach 10 mA cm−2. After 20 hours of multi‐current density stability test, the electrode shows negligible degradation while retaining an overpotential of 290 mV to reach 10 mA cm−2, thus showing a high electrocatalytic capability and stability. This work provides a new strategy to improve transition metal electrocatalysts in view of low‐cost water oxidation in alkaline media.

show abstract

B-doping-induced amorphization of LDH for large-current-density hydrogen evolution reaction

Cited by 232 publications

References 71 publications

Water Dissociation Kinetic‐Oriented Design of Nickel Sulfides via Tailored Dual Sites for Efficient Alkaline Hydrogen Evolution

Water Dissociation Kinetic‐Oriented Design of Nickel Sulfides via Tailored Dual Sites for Efficient Alkaline Hydrogen Evolution

Hollow Porous MnFe₂O₄ Sphere Grown on Elm‐Money‐Derived Biochar towards Energy‐Saving Full Water Electrolysis

Hierarchical Cu(OH)₂@Co(OH)₂ Nanotrees for Water Oxidation Electrolysis

Contact Info

Product

Resources

About

B-doping-induced amorphization of LDH for large-current-density hydrogen evolution reaction

Cited by 232 publications

References 71 publications

Water Dissociation Kinetic‐Oriented Design of Nickel Sulfides via Tailored Dual Sites for Efficient Alkaline Hydrogen Evolution

Water Dissociation Kinetic‐Oriented Design of Nickel Sulfides via Tailored Dual Sites for Efficient Alkaline Hydrogen Evolution

Hollow Porous MnFe2O4 Sphere Grown on Elm‐Money‐Derived Biochar towards Energy‐Saving Full Water Electrolysis

Hierarchical Cu(OH)2@Co(OH)2 Nanotrees for Water Oxidation Electrolysis

Contact Info

Product

Resources

About

Hollow Porous MnFe₂O₄ Sphere Grown on Elm‐Money‐Derived Biochar towards Energy‐Saving Full Water Electrolysis

Hierarchical Cu(OH)₂@Co(OH)₂ Nanotrees for Water Oxidation Electrolysis