Defect‐Driven Atomic Engineering: Oxygen Vacancy‐Stabilized Co Single Atoms on Ordered Ultrathin TiO2 Nanowires for Efficient CO2‐to‐Syngas Photoreduction DOI
Jiawei Yan,

Yalan Lin,

Mingxiong Lin

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Abstract Single‐atom catalysts (SACs) anchored on defective supports offer exceptional catalytic efficiency but face challenges in stabilizing isolated metal atoms and optimizing metal‐support interactions. Here, a defect‐driven strategy is reported to construct 3D dendritic SAC comprising interwoven ultrathin TiO 2 nanowires (NWs) with abundant oxygen vacancies (OVs) that stabilize atomically dispersed cobalt (Co) sites. Using hydrothermal synthesis followed by acid etching calcination, Ti─Co─Ti motifs are engineered at OVs site. The architecture provides multiscale porosity charge transport, achieving syngas production rates of 28.4 mmol g −1 ·h (CO) 13.9 (H ) high turnover frequency (TOF) 10.6 min , surpassing many other state‐of‐the‐art Co‐based SACs. In situ Raman electron paramagnetic resonance (EPR) analysis reveal consumption during Co anchoring, while density functional theory (DFT) validates redistribution from Ti Co, enabling efficient transfer inducing strong electronic interactions enhance CO adsorption activation. results highlight the interplay between atomic‐scale coordination environments macroscale architectural order harnessing potential SACs 1D NWs.

Language: Английский

Structural Regulation Strategies of Atomic Cobalt Catalysts for Oxygen Electrocatalysis DOI Open Access
Mengyu Chen, Jingqi Guan

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Abstract Oxygen electrocatalysis is a core reaction in renewable energy devices, greatly promoting the transformation and upgrading of structure. Nonetheless, performance conversion devices hindered by large overpotential slow kinetics oxygen electrocatalytic reactions. Recently, single‐atom catalysts (SACs) have emerged as promising contenders field because their exceptional metal atom utilization, distinctive coordination environment, adjustable electronic properties. This review presents latest advancements design Co‐based SACs for electrocatalysis. First, OER ORR mechanisms are introduced. Subsequently, strategies regulating structure summarized three aspects, including centers, support carriers. A particular emphasis given to relationship between properties catalysts. Afterward, applications explored. Ultimately, challenges prospects prospected.

Language: Английский

Citations

2
Boosting the Hydrogen Evolution Activity of a Low‐Coordinated Co─N─C Catalyst via Vacancy Defect‐Mediated Alteration of the Intermediate Adsorption Configuration DOI Creative Commons

Qianwei Song,

Zhichao Gong, Jianbin Liu

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Abstract The cobalt‐nitrogen‐carbon (Co─N─C) single‐atom catalysts (SACs) are promising alternatives to precious metals for catalyzing the hydrogen evolution reaction (HER) and their activity is highly dependent on coordination environments of metal centers. Herein, a NaHCO 3 etching strategy developed introduce abundant in‐plane pores within carbon substrates that further enable construction low‐coordinated asymmetric Co─N sites with nearby vacancy defects in Co─N─C catalyst. This catalyst exhibits high HER an overpotential ( η ) merely 78 mV deliver current density 10 mA cm −2 , Tafel slope 45.2 dec −1 turnover frequency 1.67 s (at = 100 mV). Experimental investigations theoretical calculations demonstrate neighboring can modulate electronic structure alter adsorption configuration H intermediate from typical atop mode side mode, resulting weakened strength thus improved activity. work provides efficient regulate environment SACs catalytic performance sheds light atomic‐level understanding structure‐activity relationships.

Language: Английский

Citations

1
Preparation of Fe, Co, Ni-based single atom catalysts and the progress of their application in electrocatalysis DOI Open Access

Yuquan Yang,

Meifang Huang,

Bin-Bin Gao

et al.

Microstructures, Journal Year: 2025, Volume and Issue: 5(1)

Published: Jan. 8, 2025

Single-atom catalysts (SACs) have garnered considerable attention owing to their profound potential in promoting the efficient utilization of metal resources and attaining atomic-level economy. Fe, Co, Ni SACs demonstrated broad application prospects electrocatalysis due tunable composition structure, as well unique electronic properties. Firstly, various preparation methods for are outlined this review, including high-temperature pyrolysis, impregnation, chemical vapor deposition, atomic layer deposition. These not only enhance efficiency atoms but also ensure stability catalysts. Subsequently, review summarizes recent progress applications electrocatalysis, with a particular focus on efficacy hydrogen evolution reaction, oxygen reduction carbon dioxide nitrogen reaction. Despite remarkable advancements, still face challenges related large-scale production, enhancement, comprehensive characterization, mechanistic exploration. Finally, discusses these proposes strategies address them order fully realize high-performance

Language: Английский

Citations

0
Group VIII elements-based single-atom electrocatalysts for energy conversion: a mini review DOI
Lei Zhang, Maolin Li,

Sanshuang Gao

et al.

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

Language: Английский

Citations

0
Defect‐Driven Atomic Engineering: Oxygen Vacancy‐Stabilized Co Single Atoms on Ordered Ultrathin TiO2 Nanowires for Efficient CO2‐to‐Syngas Photoreduction DOI
Jiawei Yan,

Yalan Lin,

Mingxiong Lin

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Abstract Single‐atom catalysts (SACs) anchored on defective supports offer exceptional catalytic efficiency but face challenges in stabilizing isolated metal atoms and optimizing metal‐support interactions. Here, a defect‐driven strategy is reported to construct 3D dendritic SAC comprising interwoven ultrathin TiO 2 nanowires (NWs) with abundant oxygen vacancies (OVs) that stabilize atomically dispersed cobalt (Co) sites. Using hydrothermal synthesis followed by acid etching calcination, Ti─Co─Ti motifs are engineered at OVs site. The architecture provides multiscale porosity charge transport, achieving syngas production rates of 28.4 mmol g −1 ·h (CO) 13.9 (H ) high turnover frequency (TOF) 10.6 min , surpassing many other state‐of‐the‐art Co‐based SACs. In situ Raman electron paramagnetic resonance (EPR) analysis reveal consumption during Co anchoring, while density functional theory (DFT) validates redistribution from Ti Co, enabling efficient transfer inducing strong electronic interactions enhance CO adsorption activation. results highlight the interplay between atomic‐scale coordination environments macroscale architectural order harnessing potential SACs 1D NWs.

Language: Английский

Citations

0