Effects of Structure and Constituent of Prussian Blue Analogs on Their Application in Oxygen Evolution Reaction

Zhao, Dongni; Lu, Yuezhen; Ma, Dongge

doi:10.3390/molecules25102304

Cited by 33 publications

(20 citation statements)

References 124 publications

(162 reference statements)

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“…Moreover, the contents of iron, zinc, lead, and other heavy metal salts are lower than the limits of impurities in the Chinese Pharmacopoeia, indicating that the adsorbent will not cause related diseases, such as liver failure, hypertension, reduced autoimmune function, and delayed development of the central nervous system [29]. Meanwhile, the contents of uncarbonized and dissolved matter in acid also fulfilled the standards of Chinese Pharmacopoeia, indicating that the adsorbent prepared in this study has excellent stability under acid-base conditions [30]. In addition, the adsorption capacity of the adsorbent prepared in this study was much higher than that prescribed by the Chinese Pharmacopoeia.…”

Section: Quality Inspection Analysis Of Racmentioning

confidence: 64%

Adsorption of uremic toxins using biochar for dialysate regeneration

Wang

et al. 2021

Biomass Conv. Bioref.

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Numerous studies have shown that patients with COVID-19 have a high incidence of renal dysfunction. However, the dialysis supplies, including dialysates, are also severely inadequate in hospitals at the pandemic centers. Therefore, there is an urgent need to develop materials that can efficiently and rapidly remove toxins and thus regenerate dialysate to make this vital resource remains readily available. In this work, by simple carbonization and activation treatment, the porous activated carbon from waste rubber seed shell (RAC) was prepared. The adsorption results showed that the maximum adsorption capacities of the obtained RAC for creatinine and uric acid were 430 mg/g and 504 mg/g, respectively. Significantly, the adsorption process can be close to the equilibrium state within 0.5 h, which proved the ultra-fast adsorption response capacity of RAC. Further, the thermodynamics analysis results showed that both the creatinine and uric acid adsorption processes were monolayer, exothermic, and spontaneous. The adsorption kinetics results indicated that the adsorption process of the two uremic toxins followed the pseudo-second-order rate model and was dominated by chemisorption. The instrument analysis results reflected the efficient adsorption of the RAC for the above uremic toxins which might be due to the dipole-dipole interaction between the dipolar oxygen-containing groups of the surface of RAC and the dipoles of the toxins. Moreover, the formed hydrogen bonds between the oxygen groups and the toxins also played an important role. In all, the as-prepared RAC has the potential to efficiently remove major toxins from the dialysate and can be used in in vitro dialysis of numerous patients during the current COVID-19 pandemic.

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Section: Quality Inspection Analysis Of Racmentioning

confidence: 64%

Adsorption of uremic toxins using biochar for dialysate regeneration

Wang

et al. 2021

Biomass Conv. Bioref.

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“…Meanwhile, noble-metal-based electrocatalysts are greatly limited when used in commercial applications due to their scarcity and high cost. Therefore, tremendous efforts have been devoted to the development of efficient OER catalysts that cost less [ 17 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Tuning Reconstruction Level of Precatalysts to Design Advanced Oxygen Evolution Electrocatalysts

2021

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Surface reconstruction engineering is an effective strategy to promote the catalytic activities of electrocatalysts, especially for water oxidation. Taking advantage of the physicochemical properties of precatalysts by manipulating their structural self-reconstruction levels provide a promising methodology for achieving suitable catalysts. In this review, we focus on recent advances in research related to the rational control of the process and level of surface transformation ultimately to design advanced oxygen evolution electrocatalysts. We start by discussing the original contributions to surface changes during electrochemical reactions and related factors that can influence the electrocatalytic properties of materials. We then present an overview of current developments and a summary of recently proposed strategies to boost electrochemical performance outcomes by the controlling structural self-reconstruction process. By conveying these insights, processes, general trends, and challenges, this review will further our understanding of surface reconstruction processes and facilitate the development of high-performance electrocatalysts beyond water oxidation.

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“…[11] For this reason, the combination of PBA with other nanomaterials has attracted considerable attention in order to further improve their electrocatalytic activity. [10,12] Recent studies have shown that electrocatalysts based on Co, Ni and Fe are oxidized before the onset of oxygen evolution, being the oxidized metals the active species in the pathway for O2 evolution. [13][14][15] Thus, a possibility to enhance the electrocatalytic activity could be done by combining efficient electrocatalysts with highly electronegative metals.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Electrocatalytic Activity and Stability of Prussian Blue Analogues Through the Introduction of Au Nanoparticles in a Core@shell Heterostructure

Sanchis‐Gual

Otero²,

Coronado‐Puchau³

et al. 2021

Preprint

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Prussian blue analogues (PBAs) have shown to be useful as earth-abundant electrocatalysts for the Oxygen Evolution Reaction (OER) in acidic, neutral and alkaline media. Still, further improvements can be achieved by increasing their electrical conductivity. In this work, we have obtained and fully characterized a variety of monodisperse core@shell hybrid nanoparticles of Au@PBA (PBA of NiIIFeII and CoIIFeII) with different shell sizes. Their electrocatalytical activity is evaluated by studying the OER, which is compared to the pristine PBA and other Au-PBA heterostructures. It was observed that the introduction in a core@shell of 5-10 % of Au in weight leads to an increment in the electroactive mass able to be reduced or oxidized and thus, to a higher number of sites capable to take part in the OER. This larger amount of electroactive sites leads to a significant decrease in the onset potential (a reduction of the onset potential up to 100 mV and an increase up to 420 % of the current density recorded at an overpotential of 350 mV), while the Tafel slope remains unchanged, suggesting that Au reduces the limiting potential of the catalyst with no variation in the reaction kinetics. These effects are not experimented in the other Au-PBA nanostructures mainly due to the lower contact between both compounds and the oxidation of Au. Hence, an Au core activates the PBA shell and increases the conductivity of the resulting hybrid while the PBA shell prevents Au oxidation. These improvements come from the strong synergistic effect existing in the core@shell structure and evidence the importance of the chemical design for preparing PBA-based nanostructures displaying better electrocatalytic performances and higher electrochemical stabilities.

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Effects of Structure and Constituent of Prussian Blue Analogs on Their Application in Oxygen Evolution Reaction

Cited by 33 publications

References 124 publications

Adsorption of uremic toxins using biochar for dialysate regeneration

Adsorption of uremic toxins using biochar for dialysate regeneration

Tuning Reconstruction Level of Precatalysts to Design Advanced Oxygen Evolution Electrocatalysts

Enhancing the Electrocatalytic Activity and Stability of Prussian Blue Analogues Through the Introduction of Au Nanoparticles in a Core@shell Heterostructure

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