Carbon Catalysts Empowering Sustainable Chemical Synthesis via Electrochemical CO2 Conversion and Two‐Electron Oxygen Reduction Reaction DOI Creative Commons
Yuying Zhao, Jithu Raj, Xiang Xu

и другие.

Small, Год журнала: 2024, Номер unknown

Опубликована: Фев. 2, 2024

Abstract Carbon materials hold significant promise in electrocatalysis, particularly electrochemical CO 2 reduction reaction (eCO RR) and two‐electron oxygen (2e − ORR). The pivotal factor achieving exceptional overall catalytic performance carbon catalysts is the strategic design of specific active sites nanostructures. This work presents a comprehensive overview recent developments electrocatalysts for eCO RR 2e ORR. creation through single/dual heteroatom doping, functional group decoration, topological defect, micro‐nano structuring, along with their synergistic effects, thoroughly examined. Elaboration on mechanisms structure‐activity relationships these provided. In addition to directly serving as electrocatalysts, this review explores role matrix support finely adjusting reactivity single‐atom molecular catalysts. Finally, addresses challenges prospects associated designing fabricating providing valuable insights into future trajectory dynamic field.

Язык: Английский

Enhancing H2O2 Electrosynthesis at Industrial-Relevant Current in Acidic Media on Diatomic Cobalt Sites DOI
Helai Huang, Mingze Sun, Shuwei Li

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(13), С. 9434 - 9443

Опубликована: Март 20, 2024

Electrocatalytic synthesis of hydrogen peroxide (H2O2) in acidic media is an efficient and eco-friendly approach to produce inherently stable H2O2, but limited by the lack selective catalysts under industrial-relevant current densities. Herein, we report a diatomic cobalt catalyst for two-electron oxygen reduction efficiently H2O2 at 50–400 mA cm–2 acid. Electrode kinetics study shows >95% selectivity on sites. In flow cell device, record-high production rate 11.72 mol gcat–1 h–1 exceptional long-term stability (100 h) are realized high situ spectroscopic studies theoretical calculations reveal that introducing second metal into coordination sphere site can optimize binding strength key intermediates due downshifted d-band center cobalt. We also demonstrate feasibility processing municipal plastic wastes through decentralized production.

Язык: Английский

Процитировано

62

Defect Engineering in Nanocatalysts: From Design and Synthesis to Applications DOI
Pir Muhammad, Amir Zada, Jamshaid Rashid

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер 34(29)

Опубликована: Фев. 13, 2024

Abstract Defect engineering is an emerging technology for tailoring nanomaterials' characteristics and catalytic performance in various applications. Recently, defect‐engineered nanoparticles have emerged as highly researched materials applications because of their exceptional redox reaction capabilities physicochemical optical properties. The properties nanomaterials can be readily adjusted by controlling the nature concentration defects within nanoparticles, avoiding need intricate design strategies. This review investigates defect nanocatalysts, including design, fabrication, Initially, categories strategies nanomaterial impacts on nanocatalysts' electronic surface properties, activity, selectivity, stability are summarized. Then, processes uses, gas sensing, hydrogen (H 2 ) evolutions, water splitting, reductions carbon dioxide (CO nitrogen to value‐aided products, pollutant degradation, biomedical (oncotherapy, antibacterial wound healing, biomolecular sensing) discussed. Finally, limitations prospective paths allowing logical optimization nanocatalytic long‐term efficient also examined. comprehensive gives unique insights into current state nanocatalysts inspires future research exploiting shortcomings improve customize performance.

Язык: Английский

Процитировано

59

Boosting Oxygen Reduction Reaction Kinetics by Designing Rich Vacancy Coupling Pentagons in the Defective Carbon DOI

Hongyin Xia,

Ruoyu Pang,

Xieyiming Dong

и другие.

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(47), С. 25695 - 25704

Опубликована: Ноя. 9, 2023

In the energy conversion context, design and synthesis of high-performance metal-free carbon nanomaterials with topological defects for oxygen reduction reaction (ORR) are essential. Herein, we first report a template-assisted strategy to fabricate defect electrocatalysts rich vacancy coupling pentagons (VP) as active sites in two-dimensional (2D) nanosheets (VP/CNs). Experimental characterizations verify presence abundant VP VP/CNs electrocatalyst, ORR activity is linearly related amounts sites. situ spectroscopic results identify that can catalyze direct O-O bond cleavage, bypassing formation traditional *OOH intermediates, resulting fast kinetics via dissociative pathway. The as-prepared show outstanding intrinsic alkaline (half-wave potential 0.86 V vs reversible hydrogen electrode) an almost 99% efficiency four-electron selectivity, outperforming using benchmark Pt/C. Density functional theory calculations further reveal cooperative effect between adjacent significantly increases charge transfer achieves lower barrier compared counterpart or single pentagon. well-designed pave new avenue rational high efficiency.

Язык: Английский

Процитировано

48

Understanding Advanced Transition Metal‐Based Two Electron Oxygen Reduction Electrocatalysts from the Perspective of Phase Engineering DOI Creative Commons
Hongyuan Yang, Na An, Zhenhui Kang

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(25)

Опубликована: Март 8, 2024

Abstract Non‐noble transition metal (TM)‐based compounds have recently become a focal point of extensive research interest as electrocatalysts for the two electron oxygen reduction (2e − ORR) process. To efficiently drive this reaction, these TM‐based must bear unique physiochemical properties, which are strongly dependent on their phase structures. Consequently, adopting engineering strategies toward structure has emerged cutting‐edge scientific pursuit, crucial achieving high activity, selectivity, and stability in electrocatalytic This comprehensive review addresses intricate field applied to non‐noble 2e ORR. First, connotation fundamental concepts related kinetics thermodynamics succinctly elucidated. Subsequently, focus shifts detailed discussion various approaches, including elemental doping, defect creation, heterostructure construction, coordination tuning, crystalline design, polymorphic transformation boost or revive ORR performance (selectivity, stability) catalysts, accompanied by an insightful exploration phase‐performance correlation. Finally, proposes fresh perspectives current challenges opportunities burgeoning field, together with several critical directions future development electrocatalysts.

Язык: Английский

Процитировано

33

General Design Concept of High‐Performance Single‐Atom‐Site Catalysts for H2O2 Electrosynthesis DOI

Mingyang Deng,

Dingsheng Wang, Yadong Li

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(24)

Опубликована: Март 5, 2024

Hydrogen peroxide (H

Язык: Английский

Процитировано

31

Selective oxygen reduction reaction: mechanism understanding, catalyst design and practical application DOI Creative Commons
Shilong Li, Lei Shi, Yingjie Guo

и другие.

Chemical Science, Год журнала: 2024, Номер 15(29), С. 11188 - 11228

Опубликована: Янв. 1, 2024

The oxygen reduction reaction (ORR) is a key component for many clean energy technologies and other industrial processes. However, the low selectivity sluggish kinetics of ORR catalysts have hampered conversion efficiency real application these new mentioned before. Recently, tremendous efforts been made in mechanism understanding, electrocatalyst development system design. Here, comprehensive critical review provided to present recent advances field electrocatalytic ORR. two-electron four-electron transfer catalytic mechanisms evaluation parameters are discussed first. Then, up-to-date synthetic strategies

Язык: Английский

Процитировано

29

Carbon nanolayer-mounted single metal sites enable dipole polarization loss under electromagnetic field DOI Creative Commons

Siyao Cheng,

Daohu Sheng,

Soumya Mukherjee

и другие.

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Окт. 21, 2024

Surface modulation strategies have spurred great interest with regard to regulating the morphology, dispersion and flexible processability of materials. Unsurprisingly, customized surfaces is primed offer a route control their electronic functions. To regulate electromagnetic wave (EMW) absorption applications by surface engineering an unmet challenge. Thanks pyrolyzing surface-anchored metal-porphyrin, here we report on four-nitrogen atoms-confined single metal site nitrogen-doped carbon layer (sM(N4)@NC, M = Ni, Co, Cu, Ni/Cu) (sM=single metal; NC= layer) that registers absorption. Surface-anchored metal-porphyrins are afforded attaching them onto polypyrrole via prototypical click reaction. Further, sM(N4)@NC experimentally found elicit identical dipole polarization loss mechanism, overcoming handicaps conductivity loss, defects, interfacial among current EMW absorber models. Importantly, exhibit effective bandwidth 6.44 reflection −51.7 dB, preceding state-of-the-art carbon-based absorbers. This study introduces strategy design absorbers based sites enable fine-tunable controlled mechanism atomistic precision. In this work, Cheng et al. unique dipole-dominated model excluding other redundant opening avenue for exploring future academic studies industrially applicable absorbing

Язык: Английский

Процитировано

29

Oxygen-containing functional groups in Fe3O4@three-dimensional graphene nanocomposites for enhancing H2O2 production and orientation to 1O2 in electro-Fenton DOI
Yi Chen,

Ruidian Su,

Fei Xu

и другие.

Journal of Hazardous Materials, Год журнала: 2024, Номер 470, С. 134162 - 134162

Опубликована: Март 29, 2024

Язык: Английский

Процитировано

28

Recent Advances on Carbon‐Based Metal‐Free Electrocatalysts for Energy and Chemical Conversions DOI Creative Commons
Qingfeng Zhai,

Hetaishan Huang,

Tom Lawson

и другие.

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 25, 2024

Over the last decade, carbon-based metal-free electrocatalysts (C-MFECs) have become important in electrocatalysis. This field is started thanks to initial discovery that nitrogen atom doped carbon can function as a electrode alkaline fuel cells. A wide variety of nanomaterials, including 0D dots, 1D nanotubes, 2D graphene, and 3D porous carbons, has demonstrated high electrocatalytic performance across applications. These include clean energy generation storage, green chemistry, environmental remediation. The applicability C-MFECs facilitated by effective synthetic approaches, e.g., heteroatom doping, physical/chemical modification. methods enable creation catalysts with properties useful for sustainable transformation storage (e.g., cells, Zn-air batteries, Li-O

Язык: Английский

Процитировано

28

Advancing H2O2 electrosynthesis: enhancing electrochemical systems, unveiling emerging applications, and seizing opportunities DOI
Zhiping Deng, Seung Joon Choi, Ge Li

и другие.

Chemical Society Reviews, Год журнала: 2024, Номер 53(16), С. 8137 - 8181

Опубликована: Янв. 1, 2024

Hydrogen peroxide (H

Язык: Английский

Процитировано

27