In-situ Formation of Amorphous Co-Al-P Layer on CoAl Layered Double Hydroxide Nanoarray as Neutral Electrocatalysts for Hydrogen Evolution Reaction

Teng, Wanqing; Sun, Zhimin; Xie, Junfeng; Wang, Ziqiang; Zheng, Xiaoting; Tang, Bo

doi:10.3389/fchem.2020.552795

Cited by 9 publications

(5 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be observed that the nanolayer was nicely orientated along the <01-11> zone axis and the analysis provided interplanar distances of 0.14 nm, 0.19 nm and 0.25 nm ascribed to (110), ( 112) and (102) planes, respectively. These values were consistent with those reported in the literature [78,79]. Selected area electron diffraction (SAED) pattern involving many of these nanosheets, shown at the bottom-left inset Figure 5a.…”

Section: Resultssupporting

confidence: 91%

Zn-Cr Layered Double Hydroxides for Photocatalytic Transformation of CO2 under Visible Light Irradiation: The Effect of the Metal Ratio and Interlayer Anion

Gil-Gavilán,

Cosano,

Amaro-Gahete

et al. 2023

Catalysts

View full text Add to dashboard Cite

Carbon dioxide is the main gas responsible for the greenhouse effect. Over the last few years, the research focus of many studies has been to transform CO2 into valuable products (CO, HCOOH, HCHO, CH3OH and CH4), since it would contribute to mitigating global warming and environmental pollution. Layered double hydroxides (LDHs) are two-dimensional materials with high CO2 adsorption capacity and compositional flexibility with potential catalytic properties to be applied in CO2 reduction processes. Herein, Zn-Cr LDH-based materials with different metal ratio and interlayer anions, i.e., chloride (Cl−), graphene quantum dots (GQDs), sodium dodecyl sulfate (SDS) and sodium deoxycholate (SDC), have been prepared by a co-precipitation method and characterized by different techniques. The influence of the interlayer inorganic and organic anions and the metal ratio on the application of Zn-Cr LDHs as catalysts for the photocatalytic CO2 reduction reaction under visible light irradiation is unprecedentedly reported. The catalytic tests have been carried out with Ru(bpy)32+ as photosensitizer (PS) and triethanolamine as sacrificial electron donor (ED) at λ = 450 nm. All LDHs materials exhibited good photocatalytic activity towards CO. Among them, LDH3-SDC showed the best catalytic performance, achieving 10,977 µmol CO g−1 at 24 h under visible light irradiation with a CO selectivity of 88%. This study provides pertinent findings about the modified physicochemical features of Zn-Cr LDHs, such as particle size, surface area and the nature of the interlayer anion, and how they influence the catalytic activity in CO2 photoreduction.

show abstract

Section: Resultssupporting

confidence: 91%

Zn-Cr Layered Double Hydroxides for Photocatalytic Transformation of CO2 under Visible Light Irradiation: The Effect of the Metal Ratio and Interlayer Anion

Gil-Gavilán,

Cosano,

Amaro-Gahete

et al. 2023

Catalysts

View full text Add to dashboard Cite

show abstract

“…Figure S1 exhibited the XRD spectra of USY zeolite and CoAl‐LDH@USY precursor. Compared with USY, additional characteristic diffraction peaks at 11.5°, 34.6°, and 60.0° which were attributed to the formation of CoAl‐LDH were observed in CoAl‐LDH@USY, and the structure of USY was retained after in‐situ growth, suggesting the formation of CoAl‐LDH on USY surface [25] . Figure 1(b) showed the XRD patterns of the Co‐based catalysts.…”

Section: Resultsmentioning

confidence: 99%

“…Compared with USY, additional characteristic diffraction peaks at 11.5°, 34.6°, and 60.0°which were attributed to the formation of CoAl-LDH were observed in CoAl-LDH@USY, and the structure of USY was retained after in-situ growth, suggesting the formation of CoAl-LDH on USY surface. [25] ChemCatChem lattice planes of Co (JCPDS 05-0527). The results indicated that Co nanoparticles were successfully formed on the catalysts.…”

Section: Characterizationmentioning

confidence: 99%

Fabricating Bifunctional Co−Al₂O₃@USY Catalyst via In‐Situ Growth Method for Mild Hydrodeoxygenation of Lignin to Naphthenes

Cheng

Jia

et al. 2022

ChemCatChem

View full text Add to dashboard Cite

To enhance the catalytic activity and stability of metal catalysts in the hydrodeoxygenation of lignin derivatives into naphthenes, a bifunctional Co−Al2O3@USY catalyst was fabricated by the reduction of CoAl layered double hydroxide in‐situ grown on the USY zeolite. In the hydrodeoxygenation of guaiacol, a 100.0 % conversion with cyclohexane yield up to 93.6 % was achieved at 180 °C, 3 MPa for 4 h, which should be the hitherto lowest reaction temperature that has been reported over Co‐based metal catalysts. This catalyst was also relatively stable with 5 runs and exhibited excellent catalytic performance in the hydrodeoxygenation of other lignin model compounds and even real lignin feedstock into naphthenes. The high‐efficiency of Co−Al2O3@USY was attributed to the synergistic effect between well‐dispersed small Co nanoparticles and abundant acidic sites on the USY surface, while the outstanding stability was attributed to the anchoring effect of Al2O3 matrix to Co nanoparticles which avoided the leaching of Co species and particle agglomeration. This work provides a potential strategy for the design of an efficient and stable catalyst for lignin utilization.

show abstract

“…On the other hand, some noble metal-free based − and carbon-loaded transition metal electrocatalysts for chlorine evolution have been developed, − but their catalytic efficiency and durability still cannot meet the requirements. Amorphous alloys, due to their unique disordered structure, surface inhomogeneity, and wide compositional adjustability range, have been proved to have excellent performance in catalytic processes such as hydrogen and oxygen evolution. − In the chlorine evolution reaction, amorphous alloys also have great catalytic potential. However, amorphous alloys have a complicated compositional space; just take a simple binary alloy as an example, there are 10 15 compositional schemes for clusters of 150 atoms, which have caused a great obstacle for researchers to explore the catalytic mechanism of chlorine evolution in amorphous alloys.…”

Section: Introductionmentioning

confidence: 99%

Machine-Learning Accelerated DFT to Predict Activation Energies on Amorphous Nanocatalysts for the Chlorine Evolution Reaction

Zhang,

Chen,

et al. 2024

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

In order to improve the production efficiency of chlorine (Cl 2 ) and reduce production costs, electrocatalysts with high activity are essential. The conventional catalysts such as dimensionally stable anode (DSA) have the disadvantages of high cost and poor selectivity. Amorphous alloy is a promising candidate for a low-cost and efficient chlorine evolution reaction (CER) electrocatalyst. In this letter, we predicted an efficient amorphous NiFeP catalyst by using machine-learning (ML) accelerated density functional theory (DFT). There is a problem of insufficient adsorption sites in traditional DFT calculations. To deal with this insufficiency, we developed a distance contribution descriptor for ML feature engineering and calculated the Gibbs free energies (ΔG Cl ) of 50400 Cl* binding sites on the surface of Ni 40 Fe 40 P 20 by ML-accelerated DFT. At the same time, the analysis of catalytic reaction pathways, bonding configurations, and surface adsorption capacity shows that the CER is more inclined to the Volmer−Heyrovsky pathway, and the Ni and Fe atoms contribute to the adsorption of Cl − , while the P atom contributes to the desorption of Cl − . These research methods provide an idea for predicting the activation energies of amorphous nanocatalysts.

show abstract

In-situ Formation of Amorphous Co-Al-P Layer on CoAl Layered Double Hydroxide Nanoarray as Neutral Electrocatalysts for Hydrogen Evolution Reaction

Cited by 9 publications

References 55 publications

Zn-Cr Layered Double Hydroxides for Photocatalytic Transformation of CO2 under Visible Light Irradiation: The Effect of the Metal Ratio and Interlayer Anion

Zn-Cr Layered Double Hydroxides for Photocatalytic Transformation of CO2 under Visible Light Irradiation: The Effect of the Metal Ratio and Interlayer Anion

Fabricating Bifunctional Co−Al₂O₃@USY Catalyst via In‐Situ Growth Method for Mild Hydrodeoxygenation of Lignin to Naphthenes

Machine-Learning Accelerated DFT to Predict Activation Energies on Amorphous Nanocatalysts for the Chlorine Evolution Reaction

Contact Info

Product

Resources

About

In-situ Formation of Amorphous Co-Al-P Layer on CoAl Layered Double Hydroxide Nanoarray as Neutral Electrocatalysts for Hydrogen Evolution Reaction

Cited by 9 publications

References 55 publications

Zn-Cr Layered Double Hydroxides for Photocatalytic Transformation of CO2 under Visible Light Irradiation: The Effect of the Metal Ratio and Interlayer Anion

Zn-Cr Layered Double Hydroxides for Photocatalytic Transformation of CO2 under Visible Light Irradiation: The Effect of the Metal Ratio and Interlayer Anion

Fabricating Bifunctional Co−Al2O3@USY Catalyst via In‐Situ Growth Method for Mild Hydrodeoxygenation of Lignin to Naphthenes

Machine-Learning Accelerated DFT to Predict Activation Energies on Amorphous Nanocatalysts for the Chlorine Evolution Reaction

Contact Info

Product

Resources

About

Fabricating Bifunctional Co−Al₂O₃@USY Catalyst via In‐Situ Growth Method for Mild Hydrodeoxygenation of Lignin to Naphthenes