Boosting bifunctional oxygen electrocatalysis of graphitic C<sub>3</sub>N<sub>4</sub> using non-covalently functionalized non-oxidized graphene aerogels as catalyst supports

Kim, Jin; Tiwari, Anand P.; Choi, Myungwoo; Chen, Qiang; Lee, Jinho; Novak, Travis G.; Park, Minsu; Kim, Ki-Sun; An, Ki‐Seok; Jeon, Seokwoo

doi:10.1039/d2ta02031a

Cited by 10 publications

(1 citation statement)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, great research efforts have been devoted to replacing expensive and noble metal-based electrocatalysts with earth-abundant materials for efficient H 2 production and utilization. In recent years, numerous alternative electrocatalysts including transition-metal-based alloys, − chalcogenides, − nitrides, − and phosphides − have been investigated to replace noble metal electrocatalysts, offering promise given their similar d-band states to those of Pt . Nevertheless, the electrocatalytic HER performance of most alternatives to noble metal-based electrocatalysts remains insufficient for industrial applications in terms of stability and activity.…”

Section: Introductionmentioning

confidence: 99%

MXene Anion Engineering for Efficient Hydrogen Evolution

Tiwari

McBride

Hamlin

et al. 2023

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

MXenes have attracted attention as promising electrocatalysts for performing the hydrogen evolution reaction (HER). However, the poor intrinsic kinetics and inadequate density of active sites restrict MXenes as viable electrocatalysts for efficient hydrogen production. Herein, these hindrances are overcome via tunable doping of anion atoms as electron donors in titanium carbide (Ti3C2T X ) MXenes. By engineering the co-doping of nitrogen and sulfur anions, we achieve efficient electrocatalytic activity through synergistic chemical and structural changes. The modified MXene offers an optimal concentration of Ti–S and Ti–N bonds at the surface of hexagonal nanoplate-decorated nanosheets, resulting in a low overpotential of 260 mV and a Tafel slope of 85 mV/dec in an acidic medium, which is improved 3× over that of the pristine MXene (overpotential of 770 mV). This modified Ti3C2T X catalyst also displays superior durability compared with other earth-abundant catalysts, showing an operation for 60 h of continuous hydrogen evolution without any decay in its performance. The enhanced electrocatalytic activity of anion-co-doped Ti3C2T X MXene is attributed to manipulation of the electronic structure through synergistic N and S bonding, which promotes balanced adsorption/desorption of the intermediate hydrogen H* by lowering the Gibbs free energy (ΔG H* = −0.07 eV). Our strategy to improve the electrocatalytic activity of Ti3C2T X by anion engineering has the potential to enhance the electrocatalytic activity of numerous MXenes as well as other high surface area 2D materials.

show abstract

Section: Introductionmentioning

confidence: 99%

MXene Anion Engineering for Efficient Hydrogen Evolution

Tiwari

McBride

Hamlin

et al. 2023

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

Catalytically Active Carbon for Oxygen Reduction Reaction in Energy Conversion: Recent Advances and Future Perspectives

Liu,

Wang,

Liu

et al. 2024

Advanced Science

View full text Add to dashboard Cite

The shortage and unevenness of fossil energy sources are affecting the development and progress of human civilization. The technology of efficiently converting material resources into energy for utilization and storage is attracting the attention of researchers. Environmentally friendly biomass materials are a treasure to drive the development of new‐generation energy sources. Electrochemical theory is used to efficiently convert the chemical energy of chemical substances into electrical energy. In recent years, significant progress has been made in the development of green and economical electrocatalysts for oxygen reduction reaction (ORR). Although many reviews have been reported around the application of biomass‐derived catalytically active carbon (CAC) catalysts in ORR, these reviews have only selected a single/partial topic (including synthesis and preparation of catalysts from different sources, structural optimization, or performance enhancement methods based on CAC catalysts, and application of biomass‐derived CACs) for discussion. There is no review that systematically addresses the latest progress in the synthesis, performance enhancement, and applications related to biomass‐derived CAC‐based oxygen reduction electrocatalysts synchronously. This review fills the gap by providing a timely and comprehensive review and summary from the following sections: the exposition of the basic catalytic principles of ORR, the summary of the chemical composition and structural properties of various types of biomass, the analysis of traditional and the latest popular biomass‐derived CAC synthesis methods and optimization strategies, and the summary of the practical applications of biomass‐derived CAC‐based oxidative reduction electrocatalysts. This review provides a comprehensive summary of the latest advances to provide research directions and design ideas for the development of catalyst synthesis/optimization and contributes to the industrialization of biomass‐derived CAC electrocatalysis and electric energy storage.

show abstract

Efficient Palladium Catalysts: Application and Challenges of Electrocatalytic Hydrodechlorination Technology in Wastewater Treatment

Li,

Kong

2023

ChemCatChem

View full text Add to dashboard Cite

This review summarizes the research progress of palladium (Pd) catalysts in electrocatalytic hydrodechlorination (ECH) for the removal of chlorinated organic pollutants (COPs). ECH technology is a new type of green water treatment technology without secondary pollution, which has excellent removal effect on COPs. Pd is widely used in the field of ECH due to its excellent catalytic properties. However, the easy deactivation and high price of Pd have limited the application of Pd catalysts in practical wastewater treatment. Researchers have improved the performance of Pd catalysts for ECH by improving the morphological structure (dispersion, particle size, crystalline surface) and electronic states (electron‐rich Pd, electron‐deficient Pd). It is also found that modulation of the adsorption abilities of Pd catalysts can greatly improve the catalytic activity. The factors affecting the stability of Pd catalysts are also investigated, and the future large‐scale mature application of ECH technology is envisioned. The ability to prepare single‐atom Pd catalysts in a relatively simple way is a future direction, which will achieve 100% atom utilization and thus significantly reduce the cost of Pd. This review details the frontier research on Pd catalysts in the field of ECH, which can provide some good strategies for related researchers.

show abstract

Boosting bifunctional oxygen electrocatalysis of graphitic C₃N₄ using non-covalently functionalized non-oxidized graphene aerogels as catalyst supports

Abstract: Doping state of graphene can regulate electron donation and acceptance with the supported active material during electrocatalytic reactions. Effectively doping graphene is thus crucial for inducing ideal electron transfer for...

Cited by 10 publications

References 54 publications

MXene Anion Engineering for Efficient Hydrogen Evolution

MXene Anion Engineering for Efficient Hydrogen Evolution

Catalytically Active Carbon for Oxygen Reduction Reaction in Energy Conversion: Recent Advances and Future Perspectives

Efficient Palladium Catalysts: Application and Challenges of Electrocatalytic Hydrodechlorination Technology in Wastewater Treatment

Contact Info

Product

Resources

About

Boosting bifunctional oxygen electrocatalysis of graphitic C3N4 using non-covalently functionalized non-oxidized graphene aerogels as catalyst supports

Abstract: Doping state of graphene can regulate electron donation and acceptance with the supported active material during electrocatalytic reactions. Effectively doping graphene is thus crucial for inducing ideal electron transfer for...

Cited by 10 publications

References 54 publications

MXene Anion Engineering for Efficient Hydrogen Evolution

MXene Anion Engineering for Efficient Hydrogen Evolution

Catalytically Active Carbon for Oxygen Reduction Reaction in Energy Conversion: Recent Advances and Future Perspectives

Efficient Palladium Catalysts: Application and Challenges of Electrocatalytic Hydrodechlorination Technology in Wastewater Treatment

Contact Info

Product

Resources

About

Boosting bifunctional oxygen electrocatalysis of graphitic C₃N₄ using non-covalently functionalized non-oxidized graphene aerogels as catalyst supports