Pulsed electrocatalysis enables the stabilization and activation of carbon-based catalysts towards H2O2 production

This review focuses on the formation and preparation of defects, the dynamic evolution process of defects, and the influence of defect dynamic evolution on catalytic reactions. The summary of the current advances in the dynamic evolution process of defects in oxygen evolution reaction, hydrogen evolution reaction, nitrogen reduction reaction, oxygen reduction reaction, and carbon dioxide reduction reaction, and the given perspectives are expected to provide a more comprehensive understanding of defective electrocatalysts on the structural evolution process during electrocatalysis and the reaction mechanisms, especially for the defect dynamic evolution on the performance in catalytic reactions.

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Section: Co 2 Rrmentioning

confidence: 99%

mentioning

confidence: 99%

Insights into the Dynamic Evolution of Defects in Electrocatalysts

et al. 2023

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“…Regarding the methods to alleviate the H 2 O 2 decomposition, pulsed electrolysis and unconventional supporting electrolyte have been previously reported [ 38 , 39 ]. Pulsed electrolysis replacing constant current/potential mode may hinder the decomposition thanks to the enhancement of products/reagents toward/from the cathode vicinity during the off-time period and thus, reduce their further reduction on the porous surface [ 40 , 41 ]. In addition, unconventional pyrophosphate supporting electrolyte has been observed to decrease the decomposition rate of H 2 O 2 [ 38 ].…”

Section: Developments In the Ef Process In The Past Two Decadesmentioning

confidence: 99%

“…But its usage in the EF process is still at an early stage. Despite the fact that pulse method favors the in-situ regulation of active sites during 2e − -ORR [ 40 ] and mass transport of cathodic iron reduction [ 37 ], mechanistic research on a molecular level using a time-dependent continuum model is highly desirable, especially involved in the reconstruction of the electrode surface, reaction intermediates, the double-layer effect and mass transport effect.…”

Section: Future Perspectivesmentioning

confidence: 99%

State-of-the-art review and bibliometric analysis on electro-Fenton process

Deng

Jiang²,

Sirés³

2022

Carbon Lett.

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The electro-Fenton (EF) process was first proposed in 1996 and, since then, considerable development has been achieved for its application in wastewater treatment, especially at lab and pilot scale. After more than 25 years, the high efficiency, versatility and environmental compatibility of EF process has been demonstrated. In this review, bibliometrics has been adopted as a tool that allows quantifying the development of EF as well as introducing some useful correlations. As a result, information is summarized in a more visual manner that can be easily analyzed and interpreted as compared to conventional reviewing. During the recent decades under review, 83 countries have contributed to the dramatic growth of EF publications, with China, Spain and France leading the publication output. The top 12 most cited articles, along with the top 32 most productive authors in the EF field, have been screened. Four stages have been identified as main descriptors of the development of EF throughout these years, being each stage characterized by relevant breakthroughs. To conclude, a general cognitive model for the EF process is proposed, including atomic, microscopic and macroscopic views, and future perspectives are discussed. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s42823-022-00420-z.

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“…Coincidentally, compared to normal charging, pulsed charging has been proven to improve the electrochemical performance of electrochemical systems due to its relaxation time advantage. − For example, in electroplating, an alumina coating with a controllable structure and good substrate adhesion can be prepared by pulsed magnetron sputtering. When this material is applied to the anode of a zinc-ion battery, the electrochemical performance of the battery can be significantly improved .…”

Section: Introductionmentioning

confidence: 99%

Pulsed Current Boosts the Stability of the Lithium Metal Anode and the Improvement of Lithium–Oxygen Battery Performance

Zhang

Zhou

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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Lithium–oxygen batteries have received extensive attention due to their high theoretical specific capacity, but problems such as high charging overpotential and poor cycling performance hinder their practical application. Herein, a pulsed current, which merits its relaxation phenomenon, is applied during the charging cycle to address the abovementioned problems. Pulsed charging can not only reduce the charging overpotential, but also control the mass transfer and distribution of lithium ions. As a result, the uniform deposition of lithium ions on the anode surface is realized, the repeated rupture and formation of the solid electrolyte interphase is reduced, and the growth of the lithium dendrites is successfully suppressed, thereby achieving the purpose of protecting lithium metal from excessive consumption. When the pulsed charging duty ratio (T on/T off) is 1:1, after 25 cycles, the lithium–oxygen battery anode still presents a relatively flat and dense deposition surface, which is obviously better than the loose and rough surface after normal cycling. In addition, the protective effect of pulsed charging on the lithium metal anodes of lithium–oxygen batteries is also verified by the construction of other lithium-based batteries.

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Pulsed electrocatalysis enables the stabilization and activation of carbon-based catalysts towards H2O2 production

Cited by 52 publications

References 62 publications

Insights into the Dynamic Evolution of Defects in Electrocatalysts

Insights into the Dynamic Evolution of Defects in Electrocatalysts

State-of-the-art review and bibliometric analysis on electro-Fenton process

Pulsed Current Boosts the Stability of the Lithium Metal Anode and the Improvement of Lithium–Oxygen Battery Performance

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